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van Putten MJAM, Ruijter BJ, Horn J, van Rootselaar AF, Tromp SC, van Kranen-Mastenbroek V, Gaspard N, Hofmeijer J. Quantitative Characterization of Rhythmic and Periodic EEG Patterns in Patients in a Coma After Cardiac Arrest and Association With Outcome. Neurology 2024; 103:e209608. [PMID: 38991197 DOI: 10.1212/wnl.0000000000209608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/13/2024] Open
Abstract
OBJECTIVES Rhythmic and periodic patterns (RPPs) on EEG in patients in a coma after cardiac arrest are associated with a poor neurologic outcome. We characterize RPPs using qEEG in relation to outcomes. METHODS Post hoc analysis was conducted on 172 patients in a coma after cardiac arrest from the TELSTAR trial, all with RPPs. Quantitative EEG included corrected background continuity index (BCI*), relative discharge power (RDP), discharge frequency, and shape similarity. Neurologic outcomes at 3 months after arrest were categorized as poor (CPC = 3-5) or good (CPC = 1-2). RESULTS A total of 16 patients (9.3%) had a good outcome. Patients with good outcomes showed later RPP onset (28.5 vs 20.1 hours after arrest, p < 0.05) and higher background continuity at RPP onset (BCI* = 0.83 vs BCI* = 0.59, p < 0.05). BCI* <0.45 at RPP onset, maximum BCI* <0.76, RDP >0.47, or shape similarity >0.75 were consistently associated with poor outcomes, identifying 36%, 22%, 40%, or 24% of patients with poor outcomes, respectively. In patients meeting both BCI* >0.44 at RPP onset and BCI* >0.75 within 72 hours, the probability of good outcomes doubled to 18%. DISCUSSION Sufficient EEG background continuity before and during RPPs is crucial for meaningful recovery. Background continuity, discharge power, and shape similarity can help select patients with relevant chances of recovery and may guide treatment. TRIAL REGISTRATION INFORMATION February 4, 2014, ClinicalTrial.gov, NCT02056236.
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Affiliation(s)
- Michel J A M van Putten
- From the Clinical Neurophysiology Group and Department of Clinical Neurophysiology (M.J.A.M.v.P.), University of Twente and Medisch Spectrum Twente; Department of Neurology (B.J.R.), OLVG, Amsterdam; Department of Intensive Care (Janneke Horn); Department of Neurology and Clinical Neurophysiology (A.-F.v.R.), Amsterdam Neuroscience, Amsterdam UMC, the Netherlands; Department of Clinical Neurophysiology (S.C.T.), St Antonius Hospital, Nieuwegein and Department of Neurology, LUMC, Leiden; Department of Neurology (V.v.K.-M.), Maastricht UMC+, the Netherlands; Department of Neurology (N.G.), Hôpital Universitaire de Bruxelles - Hôpital Erasme, Brussels, Belgium and Department of Neurology, Yale University School of Medicine, New Haven, CT; and Department of Neurology (Jeannette Hofmeijer), Rijnstate Hospital and Clinical Neurophysiology Group, University of Twente, the Netherlands
| | - Barry J Ruijter
- From the Clinical Neurophysiology Group and Department of Clinical Neurophysiology (M.J.A.M.v.P.), University of Twente and Medisch Spectrum Twente; Department of Neurology (B.J.R.), OLVG, Amsterdam; Department of Intensive Care (Janneke Horn); Department of Neurology and Clinical Neurophysiology (A.-F.v.R.), Amsterdam Neuroscience, Amsterdam UMC, the Netherlands; Department of Clinical Neurophysiology (S.C.T.), St Antonius Hospital, Nieuwegein and Department of Neurology, LUMC, Leiden; Department of Neurology (V.v.K.-M.), Maastricht UMC+, the Netherlands; Department of Neurology (N.G.), Hôpital Universitaire de Bruxelles - Hôpital Erasme, Brussels, Belgium and Department of Neurology, Yale University School of Medicine, New Haven, CT; and Department of Neurology (Jeannette Hofmeijer), Rijnstate Hospital and Clinical Neurophysiology Group, University of Twente, the Netherlands
| | - Janneke Horn
- From the Clinical Neurophysiology Group and Department of Clinical Neurophysiology (M.J.A.M.v.P.), University of Twente and Medisch Spectrum Twente; Department of Neurology (B.J.R.), OLVG, Amsterdam; Department of Intensive Care (Janneke Horn); Department of Neurology and Clinical Neurophysiology (A.-F.v.R.), Amsterdam Neuroscience, Amsterdam UMC, the Netherlands; Department of Clinical Neurophysiology (S.C.T.), St Antonius Hospital, Nieuwegein and Department of Neurology, LUMC, Leiden; Department of Neurology (V.v.K.-M.), Maastricht UMC+, the Netherlands; Department of Neurology (N.G.), Hôpital Universitaire de Bruxelles - Hôpital Erasme, Brussels, Belgium and Department of Neurology, Yale University School of Medicine, New Haven, CT; and Department of Neurology (Jeannette Hofmeijer), Rijnstate Hospital and Clinical Neurophysiology Group, University of Twente, the Netherlands
| | - Anne-Fleur van Rootselaar
- From the Clinical Neurophysiology Group and Department of Clinical Neurophysiology (M.J.A.M.v.P.), University of Twente and Medisch Spectrum Twente; Department of Neurology (B.J.R.), OLVG, Amsterdam; Department of Intensive Care (Janneke Horn); Department of Neurology and Clinical Neurophysiology (A.-F.v.R.), Amsterdam Neuroscience, Amsterdam UMC, the Netherlands; Department of Clinical Neurophysiology (S.C.T.), St Antonius Hospital, Nieuwegein and Department of Neurology, LUMC, Leiden; Department of Neurology (V.v.K.-M.), Maastricht UMC+, the Netherlands; Department of Neurology (N.G.), Hôpital Universitaire de Bruxelles - Hôpital Erasme, Brussels, Belgium and Department of Neurology, Yale University School of Medicine, New Haven, CT; and Department of Neurology (Jeannette Hofmeijer), Rijnstate Hospital and Clinical Neurophysiology Group, University of Twente, the Netherlands
| | - Selma C Tromp
- From the Clinical Neurophysiology Group and Department of Clinical Neurophysiology (M.J.A.M.v.P.), University of Twente and Medisch Spectrum Twente; Department of Neurology (B.J.R.), OLVG, Amsterdam; Department of Intensive Care (Janneke Horn); Department of Neurology and Clinical Neurophysiology (A.-F.v.R.), Amsterdam Neuroscience, Amsterdam UMC, the Netherlands; Department of Clinical Neurophysiology (S.C.T.), St Antonius Hospital, Nieuwegein and Department of Neurology, LUMC, Leiden; Department of Neurology (V.v.K.-M.), Maastricht UMC+, the Netherlands; Department of Neurology (N.G.), Hôpital Universitaire de Bruxelles - Hôpital Erasme, Brussels, Belgium and Department of Neurology, Yale University School of Medicine, New Haven, CT; and Department of Neurology (Jeannette Hofmeijer), Rijnstate Hospital and Clinical Neurophysiology Group, University of Twente, the Netherlands
| | - Vivianne van Kranen-Mastenbroek
- From the Clinical Neurophysiology Group and Department of Clinical Neurophysiology (M.J.A.M.v.P.), University of Twente and Medisch Spectrum Twente; Department of Neurology (B.J.R.), OLVG, Amsterdam; Department of Intensive Care (Janneke Horn); Department of Neurology and Clinical Neurophysiology (A.-F.v.R.), Amsterdam Neuroscience, Amsterdam UMC, the Netherlands; Department of Clinical Neurophysiology (S.C.T.), St Antonius Hospital, Nieuwegein and Department of Neurology, LUMC, Leiden; Department of Neurology (V.v.K.-M.), Maastricht UMC+, the Netherlands; Department of Neurology (N.G.), Hôpital Universitaire de Bruxelles - Hôpital Erasme, Brussels, Belgium and Department of Neurology, Yale University School of Medicine, New Haven, CT; and Department of Neurology (Jeannette Hofmeijer), Rijnstate Hospital and Clinical Neurophysiology Group, University of Twente, the Netherlands
| | - Nicolas Gaspard
- From the Clinical Neurophysiology Group and Department of Clinical Neurophysiology (M.J.A.M.v.P.), University of Twente and Medisch Spectrum Twente; Department of Neurology (B.J.R.), OLVG, Amsterdam; Department of Intensive Care (Janneke Horn); Department of Neurology and Clinical Neurophysiology (A.-F.v.R.), Amsterdam Neuroscience, Amsterdam UMC, the Netherlands; Department of Clinical Neurophysiology (S.C.T.), St Antonius Hospital, Nieuwegein and Department of Neurology, LUMC, Leiden; Department of Neurology (V.v.K.-M.), Maastricht UMC+, the Netherlands; Department of Neurology (N.G.), Hôpital Universitaire de Bruxelles - Hôpital Erasme, Brussels, Belgium and Department of Neurology, Yale University School of Medicine, New Haven, CT; and Department of Neurology (Jeannette Hofmeijer), Rijnstate Hospital and Clinical Neurophysiology Group, University of Twente, the Netherlands
| | - Jeannette Hofmeijer
- From the Clinical Neurophysiology Group and Department of Clinical Neurophysiology (M.J.A.M.v.P.), University of Twente and Medisch Spectrum Twente; Department of Neurology (B.J.R.), OLVG, Amsterdam; Department of Intensive Care (Janneke Horn); Department of Neurology and Clinical Neurophysiology (A.-F.v.R.), Amsterdam Neuroscience, Amsterdam UMC, the Netherlands; Department of Clinical Neurophysiology (S.C.T.), St Antonius Hospital, Nieuwegein and Department of Neurology, LUMC, Leiden; Department of Neurology (V.v.K.-M.), Maastricht UMC+, the Netherlands; Department of Neurology (N.G.), Hôpital Universitaire de Bruxelles - Hôpital Erasme, Brussels, Belgium and Department of Neurology, Yale University School of Medicine, New Haven, CT; and Department of Neurology (Jeannette Hofmeijer), Rijnstate Hospital and Clinical Neurophysiology Group, University of Twente, the Netherlands
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Tewarie PKB, Tjepkema-Cloostermans MC, Abeysuriya RG, Hofmeijer J, van Putten MJAM. Preservation of thalamocortical circuitry is essential for good recovery after cardiac arrest. PNAS NEXUS 2023; 2:pgad119. [PMID: 37143862 PMCID: PMC10153639 DOI: 10.1093/pnasnexus/pgad119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 03/10/2023] [Accepted: 04/04/2023] [Indexed: 05/06/2023]
Abstract
Continuous electroencephalographam (EEG) monitoring contributes to prediction of neurological outcome in comatose cardiac arrest survivors. While the phenomenology of EEG abnormalities in postanoxic encephalopathy is well known, the pathophysiology, especially the presumed role of selective synaptic failure, is less understood. To further this understanding, we estimate biophysical model parameters from the EEG power spectra from individual patients with a good or poor recovery from a postanoxic encephalopathy. This biophysical model includes intracortical, intrathalamic, and corticothalamic synaptic strengths, as well as synaptic time constants and axonal conduction delays. We used continuous EEG measurements from hundred comatose patients recorded during the first 48 h postcardiac arrest, 50 with a poor neurological outcome [cerebral performance category ( CPC = 5 ) ] and 50 with a good neurological outcome ( CPC = 1 ). We only included patients that developed (dis-)continuous EEG activity within 48 h postcardiac arrest. For patients with a good outcome, we observed an initial relative excitation in the corticothalamic loop and corticothalamic propagation that subsequently evolved towards values observed in healthy controls. For patients with a poor outcome, we observed an initial increase in the cortical excitation-inhibition ratio, increased relative inhibition in the corticothalamic loop, delayed corticothalamic propagation of neuronal activity, and severely prolonged synaptic time constants that did not return to physiological values. We conclude that the abnormal EEG evolution in patients with a poor neurological recovery after cardiac arrest may result from persistent and selective synaptic failure that includes corticothalamic circuitry and also delayed corticothalamic propagation.
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Affiliation(s)
| | - Marleen C Tjepkema-Cloostermans
- Clinical Neurophysiology Group, University of Twente, 7522 NH Enschede, Netherlands
- Department of Neurology and Clinical Neurophysiology, Medisch Spectrum Twente, 7512 KZ Enschede, Netherlands
| | - Romesh G Abeysuriya
- Computational Epidemic Modelling, Burnet Institute, 3004 Melbourne, Australia
| | - Jeannette Hofmeijer
- Clinical Neurophysiology Group, University of Twente, 7522 NH Enschede, Netherlands
- Department of Neurology, Rijnstate Hospital, 6815 AD Arnhem, Netherlands
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3
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Misirocchi F, Bernabè G, Zinno L, Spallazzi M, Zilioli A, Mannini E, Lazzari S, Tontini V, Mutti C, Parrino L, Picetti E, Florindo I. Epileptiform patterns predicting unfavorable outcome in postanoxic patients: A matter of time? Neurophysiol Clin 2023; 53:102860. [PMID: 37011480 DOI: 10.1016/j.neucli.2023.102860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2022] [Revised: 03/17/2023] [Accepted: 03/18/2023] [Indexed: 04/03/2023] Open
Abstract
OBJECTIVE Historically, epileptiform malignant EEG patterns (EMPs) have been considered to anticipate an unfavorable outcome, but an increasing amount of evidence suggests that they are not always or invariably associated with poor prognosis. We evaluated the prognostic significance of an EMP onset in two different timeframes in comatose patients after cardiac arrest (CA): early-EMPs and late-EMPs, respectively. METHODS We included all comatose post-CA survivors admitted to our intensive care unit (ICU) between 2016 and 2018 who underwent at least two 30-minute EEGs, collected at T0 (12-36 h after CA) and T1 (36-72 h after CA). All EEGs recordings were re-analyzed following the 2021 ACNS terminology by two senior EEG specialists, blinded to outcome. Malignant EEGs with abundant sporadic spikes/sharp waves, rhythmic and periodic patterns, or electrographic seizure/status epilepticus, were included in the EMP definition. The primary outcome was the cerebral performance category (CPC) score at 6 months, dichotomized as good (CPC 1-2) or poor (CPC 3-5) outcome. RESULTS A total of 58 patients and 116 EEG recording were included in the study. Poor outcome was seen in 28 (48%) patients. In contrast to late-EMPs, early-EMPs were associated with a poor outcome (p = 0.037), persisting after multiple regression analysis. Moreover, a multivariate binomial model coupling the timing of EMP onset with other EEG predictors such as T1 reactivity and T1 normal voltage background can predict outcome in the presence of an otherwise non-specific malignant EEG pattern with quite high specificity (82%) and moderate sensitivity (77%). CONCLUSIONS The prognostic significance of EMPs seems strongly time-dependent and only their early-onset may be associated with an unfavorable outcome. The time of onset of EMP combined with other EEG features could aid in defining prognosis in patients with intermediate EEG patterns.
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Lapalme-Remis S. A Cry for Survival? Rhythmic and Periodic EEG Discharges as Treatment Targets Following Cardiac Arrest. Epilepsy Curr 2022; 22:294-296. [PMID: 36285207 PMCID: PMC9549238 DOI: 10.1177/15357597221120486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Treating Rhythmic and Periodic EEG Patterns in Comatose Survivors of Cardiac
Arrest Ruijter BJ, Keijzer HM, Tjepkema-Cloostermans MC, Blans MJ, Beishuizen A, Tromp SC,
Scholten E, Horn J, van Rootselaar AF, Admiraal MM, van den Bergh WM, Elting JJ,
Foudraine NA, Kornips FHM, van Kranen-Mastenbroek VHJM, Rouhl RPW, Thomeer EC,
Moudrous W, Nijhuis FAP, Booij SJ, Hoedemaekers CWE, Doorduin J, Taccone FS, van der
Palen J, van Putten MJAM, Hofmeijer J. N Engl J Med.
2022;386(8):724-734. doi:10.1056/NEJMoa2115998 Background: Whether the treatment of rhythmic and periodic electroencephalographic (EEG)
patterns in comatose survivors of cardiac arrest improves outcomes is uncertain. Methods: We conducted an open-label trial of suppressing rhythmic and periodic EEG patterns
detected on continuous EEG monitoring in comatose survivors of cardiac arrest.
Patients were randomly assigned in a 1:1 ratio to a stepwise strategy of antiseizure
medications to suppress this activity for at least 48 consecutive hours plus
standard care (antiseizure-treatment group) or to standard care alone (control
group); standard care included targeted temperature management in both groups. The
primary outcome was neurologic outcome according to the score on the Cerebral
Performance Category (CPC) scale at 3 months, dichotomized as a good outcome (CPC
score indicating no, mild, or moderate disability) or a poor outcome (CPC score
indicating severe disability, coma, or death). Secondary outcomes were mortality,
length of stay in the intensive care unit (ICU), and duration of mechanical
ventilation. Results: We enrolled 172 patients, with 88 assigned to the antiseizure-treatment group and
84 to the control group. Rhythmic or periodic EEG activity was detected a median of
35 hours after cardiac arrest; 98 of 157 patients (62%) with available data had
myoclonus. Complete suppression of rhythmic and periodic EEG activity for 48
consecutive hours occurred in 49 of 88 patients (56%) in the antiseizure-treatment
group and in 2 of 83 patients (2%) in the control group. At 3 months, 79 of 88
patients (90%) in the antiseizure-treatment group and 77 of 84 patients (92%) in the
control group had a poor outcome (difference, 2 percentage points; 95% confidence
interval, −7 to 11; P = 0.68). Mortality at 3 months was 80% in the
antiseizure-treatment group and 82% in the control group. The mean length of stay in
the ICU and mean duration of mechanical ventilation were slightly longer in the
antiseizure-treatment group than in the control group. Conclusions: In comatose survivors of cardiac arrest, the incidence of a poor neurologic outcome
at 3 months did not differ significantly between a strategy of suppressing rhythmic
and periodic EEG activity with the use of antiseizure medication for at least 48
hours plus standard care and standard care alone.
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Keijzer HM, Lange PAM, Meijer FJA, Tonino BAR, Blans MJ, Klijn CJM, Hoedemaekers CWE, Hofmeijer J, Helmich RC. MRI markers of brain network integrity relate to neurological outcome in postanoxic coma. Neuroimage Clin 2022; 36:103171. [PMID: 36058165 PMCID: PMC9446009 DOI: 10.1016/j.nicl.2022.103171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 08/18/2022] [Accepted: 08/23/2022] [Indexed: 12/14/2022]
Abstract
AIM Current multimodal approaches leave approximately half of the comatose patients after cardiac arrest with an indeterminate prognosis. Here we investigated whether early MRI markers of brain network integrity can distinguish between comatose patients with a good versus poor neurological outcome six months later. METHODS We performed a prospective cohort study in 48 patients after cardiac arrest submitted in a comatose state to the Intensive Care Unit of two Dutch hospitals. MRI was performed at three days after cardiac arrest, including resting state functional MRI and diffusion-tensor imaging (DTI). Resting state fMRI was used to quantify functional connectivity within ten resting-state networks, and DTI to assess mean diffusivity (MD) in these same networks. We contrasted two groups of patients, those with good (n = 29, cerebral performance category 1-2) versus poor (n = 19, cerebral performance category 3-5) outcome at six months. Mutual associations between functional connectivity, MD, and clinical outcome were studied. RESULTS Patients with good outcome show higher within-network functional connectivity (fMRI) and higher MD (DTI) than patients with poor outcome across 8/10 networks, most prominent in the default mode network, salience network, and visual network. While the anatomical distribution of outcome-related changes was similar for functional connectivity and MD, the pattern of inter-individual differences was very different: functional connectivity showed larger inter-individual variability in good versus poor outcome, while the opposite was observed for MD. Exploratory analyses suggested that it is possible to define network-specific cut-off values that could help in outcome prediction: (1) high functional connectivity and high MD, associated with good outcome; (2) low functional connectivity and low MD, associated with poor outcome; (3) low functional connectivity and high MD, associated with uncertain outcome. DISCUSSION Resting-state functional connectivity and mean diffusivity-three days after cardiac arrest are strongly associated with neurological recovery-six months later in a complementary fashion. The combination of fMRI and MD holds potential to improve prediction of outcome.
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Affiliation(s)
- Hanneke M Keijzer
- Department of Neurology, Rijnstate Hospital, 6800 TA Arnhem, the Netherlands; Department of Neurology, Donders Institute for Brain, Cognition, and Behaviour, Radboud University Medical Centre, 6500 HC Nijmegen, the Netherlands.
| | - Puck A M Lange
- Department of Neurology, Donders Institute for Brain, Cognition, and Behaviour, Radboud University Medical Centre, 6500 HC Nijmegen, the Netherlands
| | - Frederick J A Meijer
- Department of Medical Imaging, Radboud University Medical Centre, 6500 HC Nijmegen, the Netherlands
| | - Bart A R Tonino
- Department of Radiology, Rijnstate Hospital, 6800 TA Arnhem, the Netherlands
| | - Michiel J Blans
- Department of Intensive Care Medicine, Rijnstate Hospital, Arnhem, the Netherlands
| | - Catharina J M Klijn
- Department of Neurology, Donders Institute for Brain, Cognition, and Behaviour, Radboud University Medical Centre, 6500 HC Nijmegen, the Netherlands
| | - Cornelia W E Hoedemaekers
- Department of Intensive Care Medicine, Radboud University Medical Centre, 6500 HC Nijmegen, the Netherlands
| | - Jeannette Hofmeijer
- Department of Neurology, Rijnstate Hospital, 6800 TA Arnhem, the Netherlands; Department of Clinical Neurophysiology, University of Twente, Faculty of Science and Technology, 7522 NB Enschede, the Netherlands
| | - Rick C Helmich
- Department of Neurology, Donders Institute for Brain, Cognition, and Behaviour, Radboud University Medical Centre, 6500 HC Nijmegen, the Netherlands
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Grindegård L, Cronberg T, Backman S, Blennow K, Dankiewicz J, Friberg H, Hassager C, Horn J, Kjaer TW, Kjaergaard J, Kuiper M, Mattsson-Carlgren N, Nielsen N, van Rootselaar AF, Rossetti AO, Stammet P, Ullén S, Zetterberg H, Westhall E, Moseby-Knappe M. Association Between EEG Patterns and Serum Neurofilament Light After Cardiac Arrest. Neurology 2022; 98:e2487-e2498. [PMID: 35470143 PMCID: PMC9231840 DOI: 10.1212/wnl.0000000000200335] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Accepted: 02/21/2022] [Indexed: 01/09/2023] Open
Abstract
Background and Objectives EEG is widely used for prediction of neurologic outcome after cardiac arrest. To better understand the relationship between EEG and neuronal injury, we explored the association between EEG and neurofilament light (NfL) as a marker of neuroaxonal injury, evaluated whether highly malignant EEG patterns are reflected by high NfL levels, and explored the association of EEG backgrounds and EEG discharges with NfL. Methods We performed a post hoc analysis of the Target Temperature Management After Out-of-Hospital Cardiac Arrest trial. Routine EEGs were prospectively performed after the temperature intervention ≥36 hours postarrest. Patients who awoke or died prior to 36 hours postarrest were excluded. EEG experts blinded to clinical information classified EEG background, amount of discharges, and highly malignant EEG patterns according to the standardized American Clinical Neurophysiology Society terminology. Prospectively collected serum samples were analyzed for NfL after trial completion. The highest available concentration at 48 or 72 hours postarrest was used. Results A total of 262/939 patients with EEG and NfL data were included. Patients with highly malignant EEG patterns had 2.9 times higher NfL levels than patients with malignant patterns and NfL levels were 13 times higher in patients with malignant patterns than those with benign patterns (95% CI 1.4–6.1 and 6.5–26.2, respectively; effect size 0.47; p < 0.001). Both background and the amount of discharges were independently strongly associated with NfL levels (p < 0.001). The EEG background had a stronger association with NfL levels than EEG discharges (R2 = 0.30 and R2 = 0.10, respectively). NfL levels in patients with a continuous background were lower than for any other background (95% CI for discontinuous, burst-suppression, and suppression, respectively: 2.26–18.06, 3.91–41.71, and 5.74–41.74; effect size 0.30; p < 0.001 for all). NfL levels did not differ between suppression and burst suppression. Superimposed discharges were only associated with higher NfL levels if the EEG background was continuous. Discussion Benign, malignant, and highly malignant EEG patterns reflect the extent of brain injury as measured by NfL in serum. The extent of brain injury is more strongly related to the EEG background than superimposed discharges. Combining EEG and NfL may be useful to better identify patients misclassified by single methods. Trial Registration Information ClinicalTrials.gov NCT01020916.
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Affiliation(s)
- Linnéa Grindegård
- From Neurology (L.G., T.C., N.M.-C., M.M.-K.), Clinical Neurophysiology (S.B., E.W.), Cardiology (J.D.), and Anaesthesia and Intensive Care (H.F.), Department of Clinical Sciences Lund, Lund University, Skåne University Hospital, Malmö; Department of Psychiatry and Neurochemistry (K.B., H.Z.), Institute of Neuroscience and Physiology, the Sahlgrenska Academy, University of Gothenburg; Clinical Neurochemistry Laboratory (K.B., H.Z.), Sahlgrenska University Hospital, Mölndal, Sweden; Department of Cardiology (C.H.), Rigshospitalet and Department of Clinical Medicine, University of Copenhagen, Denmark; Departments of Intensive Care (J.H.) and Neurology/Clinical Neurophysiology (A.-F-V.R.), Amsterdam Neuroscience, Amsterdam UMC, Academic Medical Center, University of Amsterdam, the Netherlands; Departments of Clinical Neurophysiology (T.W.K.) and Cardiology (J.K.), Rigshospitalet University Hospital, Copenhagen, Denmark; Department of Intensive Care (M.K.), Medical Center Leeuwarden, the Netherlands; Clinical Memory Research Unit, Faculty of Medicine (N.M.-C.), and Wallenberg Centre for Molecular Medicine (N.M.-C.), Lund University; Anaesthesia and Intensive Care, Department of Clinical Sciences Lund (N.N.), Lund University, Helsingborg Hospital, Sweden; Department of Neurology (A.O.R.), CHUV and University of Lausanne, Switzerland; Department of Anesthesia and Intensive Care (P.S.), Centre Hospitalier de Luxembourg; Department of Life Sciences and Medicine (P.S.), Faculty of Science, Technology and Medicine, University of Luxembourg; Clinical Studies Sweden (S.U.), Skåne University Hospital, Lund; Department of Neurodegenerative Disease (H.Z.), UCL Institute of Neurology; UK Dementia Research Institute at UCL (H.Z.), London, UK; and Hong Kong Center for Neurodegenerative Diseases (H.Z.), China.
| | - Tobias Cronberg
- From Neurology (L.G., T.C., N.M.-C., M.M.-K.), Clinical Neurophysiology (S.B., E.W.), Cardiology (J.D.), and Anaesthesia and Intensive Care (H.F.), Department of Clinical Sciences Lund, Lund University, Skåne University Hospital, Malmö; Department of Psychiatry and Neurochemistry (K.B., H.Z.), Institute of Neuroscience and Physiology, the Sahlgrenska Academy, University of Gothenburg; Clinical Neurochemistry Laboratory (K.B., H.Z.), Sahlgrenska University Hospital, Mölndal, Sweden; Department of Cardiology (C.H.), Rigshospitalet and Department of Clinical Medicine, University of Copenhagen, Denmark; Departments of Intensive Care (J.H.) and Neurology/Clinical Neurophysiology (A.-F-V.R.), Amsterdam Neuroscience, Amsterdam UMC, Academic Medical Center, University of Amsterdam, the Netherlands; Departments of Clinical Neurophysiology (T.W.K.) and Cardiology (J.K.), Rigshospitalet University Hospital, Copenhagen, Denmark; Department of Intensive Care (M.K.), Medical Center Leeuwarden, the Netherlands; Clinical Memory Research Unit, Faculty of Medicine (N.M.-C.), and Wallenberg Centre for Molecular Medicine (N.M.-C.), Lund University; Anaesthesia and Intensive Care, Department of Clinical Sciences Lund (N.N.), Lund University, Helsingborg Hospital, Sweden; Department of Neurology (A.O.R.), CHUV and University of Lausanne, Switzerland; Department of Anesthesia and Intensive Care (P.S.), Centre Hospitalier de Luxembourg; Department of Life Sciences and Medicine (P.S.), Faculty of Science, Technology and Medicine, University of Luxembourg; Clinical Studies Sweden (S.U.), Skåne University Hospital, Lund; Department of Neurodegenerative Disease (H.Z.), UCL Institute of Neurology; UK Dementia Research Institute at UCL (H.Z.), London, UK; and Hong Kong Center for Neurodegenerative Diseases (H.Z.), China
| | - Sofia Backman
- From Neurology (L.G., T.C., N.M.-C., M.M.-K.), Clinical Neurophysiology (S.B., E.W.), Cardiology (J.D.), and Anaesthesia and Intensive Care (H.F.), Department of Clinical Sciences Lund, Lund University, Skåne University Hospital, Malmö; Department of Psychiatry and Neurochemistry (K.B., H.Z.), Institute of Neuroscience and Physiology, the Sahlgrenska Academy, University of Gothenburg; Clinical Neurochemistry Laboratory (K.B., H.Z.), Sahlgrenska University Hospital, Mölndal, Sweden; Department of Cardiology (C.H.), Rigshospitalet and Department of Clinical Medicine, University of Copenhagen, Denmark; Departments of Intensive Care (J.H.) and Neurology/Clinical Neurophysiology (A.-F-V.R.), Amsterdam Neuroscience, Amsterdam UMC, Academic Medical Center, University of Amsterdam, the Netherlands; Departments of Clinical Neurophysiology (T.W.K.) and Cardiology (J.K.), Rigshospitalet University Hospital, Copenhagen, Denmark; Department of Intensive Care (M.K.), Medical Center Leeuwarden, the Netherlands; Clinical Memory Research Unit, Faculty of Medicine (N.M.-C.), and Wallenberg Centre for Molecular Medicine (N.M.-C.), Lund University; Anaesthesia and Intensive Care, Department of Clinical Sciences Lund (N.N.), Lund University, Helsingborg Hospital, Sweden; Department of Neurology (A.O.R.), CHUV and University of Lausanne, Switzerland; Department of Anesthesia and Intensive Care (P.S.), Centre Hospitalier de Luxembourg; Department of Life Sciences and Medicine (P.S.), Faculty of Science, Technology and Medicine, University of Luxembourg; Clinical Studies Sweden (S.U.), Skåne University Hospital, Lund; Department of Neurodegenerative Disease (H.Z.), UCL Institute of Neurology; UK Dementia Research Institute at UCL (H.Z.), London, UK; and Hong Kong Center for Neurodegenerative Diseases (H.Z.), China
| | - Kaj Blennow
- From Neurology (L.G., T.C., N.M.-C., M.M.-K.), Clinical Neurophysiology (S.B., E.W.), Cardiology (J.D.), and Anaesthesia and Intensive Care (H.F.), Department of Clinical Sciences Lund, Lund University, Skåne University Hospital, Malmö; Department of Psychiatry and Neurochemistry (K.B., H.Z.), Institute of Neuroscience and Physiology, the Sahlgrenska Academy, University of Gothenburg; Clinical Neurochemistry Laboratory (K.B., H.Z.), Sahlgrenska University Hospital, Mölndal, Sweden; Department of Cardiology (C.H.), Rigshospitalet and Department of Clinical Medicine, University of Copenhagen, Denmark; Departments of Intensive Care (J.H.) and Neurology/Clinical Neurophysiology (A.-F-V.R.), Amsterdam Neuroscience, Amsterdam UMC, Academic Medical Center, University of Amsterdam, the Netherlands; Departments of Clinical Neurophysiology (T.W.K.) and Cardiology (J.K.), Rigshospitalet University Hospital, Copenhagen, Denmark; Department of Intensive Care (M.K.), Medical Center Leeuwarden, the Netherlands; Clinical Memory Research Unit, Faculty of Medicine (N.M.-C.), and Wallenberg Centre for Molecular Medicine (N.M.-C.), Lund University; Anaesthesia and Intensive Care, Department of Clinical Sciences Lund (N.N.), Lund University, Helsingborg Hospital, Sweden; Department of Neurology (A.O.R.), CHUV and University of Lausanne, Switzerland; Department of Anesthesia and Intensive Care (P.S.), Centre Hospitalier de Luxembourg; Department of Life Sciences and Medicine (P.S.), Faculty of Science, Technology and Medicine, University of Luxembourg; Clinical Studies Sweden (S.U.), Skåne University Hospital, Lund; Department of Neurodegenerative Disease (H.Z.), UCL Institute of Neurology; UK Dementia Research Institute at UCL (H.Z.), London, UK; and Hong Kong Center for Neurodegenerative Diseases (H.Z.), China
| | - Josef Dankiewicz
- From Neurology (L.G., T.C., N.M.-C., M.M.-K.), Clinical Neurophysiology (S.B., E.W.), Cardiology (J.D.), and Anaesthesia and Intensive Care (H.F.), Department of Clinical Sciences Lund, Lund University, Skåne University Hospital, Malmö; Department of Psychiatry and Neurochemistry (K.B., H.Z.), Institute of Neuroscience and Physiology, the Sahlgrenska Academy, University of Gothenburg; Clinical Neurochemistry Laboratory (K.B., H.Z.), Sahlgrenska University Hospital, Mölndal, Sweden; Department of Cardiology (C.H.), Rigshospitalet and Department of Clinical Medicine, University of Copenhagen, Denmark; Departments of Intensive Care (J.H.) and Neurology/Clinical Neurophysiology (A.-F-V.R.), Amsterdam Neuroscience, Amsterdam UMC, Academic Medical Center, University of Amsterdam, the Netherlands; Departments of Clinical Neurophysiology (T.W.K.) and Cardiology (J.K.), Rigshospitalet University Hospital, Copenhagen, Denmark; Department of Intensive Care (M.K.), Medical Center Leeuwarden, the Netherlands; Clinical Memory Research Unit, Faculty of Medicine (N.M.-C.), and Wallenberg Centre for Molecular Medicine (N.M.-C.), Lund University; Anaesthesia and Intensive Care, Department of Clinical Sciences Lund (N.N.), Lund University, Helsingborg Hospital, Sweden; Department of Neurology (A.O.R.), CHUV and University of Lausanne, Switzerland; Department of Anesthesia and Intensive Care (P.S.), Centre Hospitalier de Luxembourg; Department of Life Sciences and Medicine (P.S.), Faculty of Science, Technology and Medicine, University of Luxembourg; Clinical Studies Sweden (S.U.), Skåne University Hospital, Lund; Department of Neurodegenerative Disease (H.Z.), UCL Institute of Neurology; UK Dementia Research Institute at UCL (H.Z.), London, UK; and Hong Kong Center for Neurodegenerative Diseases (H.Z.), China
| | - Hans Friberg
- From Neurology (L.G., T.C., N.M.-C., M.M.-K.), Clinical Neurophysiology (S.B., E.W.), Cardiology (J.D.), and Anaesthesia and Intensive Care (H.F.), Department of Clinical Sciences Lund, Lund University, Skåne University Hospital, Malmö; Department of Psychiatry and Neurochemistry (K.B., H.Z.), Institute of Neuroscience and Physiology, the Sahlgrenska Academy, University of Gothenburg; Clinical Neurochemistry Laboratory (K.B., H.Z.), Sahlgrenska University Hospital, Mölndal, Sweden; Department of Cardiology (C.H.), Rigshospitalet and Department of Clinical Medicine, University of Copenhagen, Denmark; Departments of Intensive Care (J.H.) and Neurology/Clinical Neurophysiology (A.-F-V.R.), Amsterdam Neuroscience, Amsterdam UMC, Academic Medical Center, University of Amsterdam, the Netherlands; Departments of Clinical Neurophysiology (T.W.K.) and Cardiology (J.K.), Rigshospitalet University Hospital, Copenhagen, Denmark; Department of Intensive Care (M.K.), Medical Center Leeuwarden, the Netherlands; Clinical Memory Research Unit, Faculty of Medicine (N.M.-C.), and Wallenberg Centre for Molecular Medicine (N.M.-C.), Lund University; Anaesthesia and Intensive Care, Department of Clinical Sciences Lund (N.N.), Lund University, Helsingborg Hospital, Sweden; Department of Neurology (A.O.R.), CHUV and University of Lausanne, Switzerland; Department of Anesthesia and Intensive Care (P.S.), Centre Hospitalier de Luxembourg; Department of Life Sciences and Medicine (P.S.), Faculty of Science, Technology and Medicine, University of Luxembourg; Clinical Studies Sweden (S.U.), Skåne University Hospital, Lund; Department of Neurodegenerative Disease (H.Z.), UCL Institute of Neurology; UK Dementia Research Institute at UCL (H.Z.), London, UK; and Hong Kong Center for Neurodegenerative Diseases (H.Z.), China
| | - Christian Hassager
- From Neurology (L.G., T.C., N.M.-C., M.M.-K.), Clinical Neurophysiology (S.B., E.W.), Cardiology (J.D.), and Anaesthesia and Intensive Care (H.F.), Department of Clinical Sciences Lund, Lund University, Skåne University Hospital, Malmö; Department of Psychiatry and Neurochemistry (K.B., H.Z.), Institute of Neuroscience and Physiology, the Sahlgrenska Academy, University of Gothenburg; Clinical Neurochemistry Laboratory (K.B., H.Z.), Sahlgrenska University Hospital, Mölndal, Sweden; Department of Cardiology (C.H.), Rigshospitalet and Department of Clinical Medicine, University of Copenhagen, Denmark; Departments of Intensive Care (J.H.) and Neurology/Clinical Neurophysiology (A.-F-V.R.), Amsterdam Neuroscience, Amsterdam UMC, Academic Medical Center, University of Amsterdam, the Netherlands; Departments of Clinical Neurophysiology (T.W.K.) and Cardiology (J.K.), Rigshospitalet University Hospital, Copenhagen, Denmark; Department of Intensive Care (M.K.), Medical Center Leeuwarden, the Netherlands; Clinical Memory Research Unit, Faculty of Medicine (N.M.-C.), and Wallenberg Centre for Molecular Medicine (N.M.-C.), Lund University; Anaesthesia and Intensive Care, Department of Clinical Sciences Lund (N.N.), Lund University, Helsingborg Hospital, Sweden; Department of Neurology (A.O.R.), CHUV and University of Lausanne, Switzerland; Department of Anesthesia and Intensive Care (P.S.), Centre Hospitalier de Luxembourg; Department of Life Sciences and Medicine (P.S.), Faculty of Science, Technology and Medicine, University of Luxembourg; Clinical Studies Sweden (S.U.), Skåne University Hospital, Lund; Department of Neurodegenerative Disease (H.Z.), UCL Institute of Neurology; UK Dementia Research Institute at UCL (H.Z.), London, UK; and Hong Kong Center for Neurodegenerative Diseases (H.Z.), China
| | - Janneke Horn
- From Neurology (L.G., T.C., N.M.-C., M.M.-K.), Clinical Neurophysiology (S.B., E.W.), Cardiology (J.D.), and Anaesthesia and Intensive Care (H.F.), Department of Clinical Sciences Lund, Lund University, Skåne University Hospital, Malmö; Department of Psychiatry and Neurochemistry (K.B., H.Z.), Institute of Neuroscience and Physiology, the Sahlgrenska Academy, University of Gothenburg; Clinical Neurochemistry Laboratory (K.B., H.Z.), Sahlgrenska University Hospital, Mölndal, Sweden; Department of Cardiology (C.H.), Rigshospitalet and Department of Clinical Medicine, University of Copenhagen, Denmark; Departments of Intensive Care (J.H.) and Neurology/Clinical Neurophysiology (A.-F-V.R.), Amsterdam Neuroscience, Amsterdam UMC, Academic Medical Center, University of Amsterdam, the Netherlands; Departments of Clinical Neurophysiology (T.W.K.) and Cardiology (J.K.), Rigshospitalet University Hospital, Copenhagen, Denmark; Department of Intensive Care (M.K.), Medical Center Leeuwarden, the Netherlands; Clinical Memory Research Unit, Faculty of Medicine (N.M.-C.), and Wallenberg Centre for Molecular Medicine (N.M.-C.), Lund University; Anaesthesia and Intensive Care, Department of Clinical Sciences Lund (N.N.), Lund University, Helsingborg Hospital, Sweden; Department of Neurology (A.O.R.), CHUV and University of Lausanne, Switzerland; Department of Anesthesia and Intensive Care (P.S.), Centre Hospitalier de Luxembourg; Department of Life Sciences and Medicine (P.S.), Faculty of Science, Technology and Medicine, University of Luxembourg; Clinical Studies Sweden (S.U.), Skåne University Hospital, Lund; Department of Neurodegenerative Disease (H.Z.), UCL Institute of Neurology; UK Dementia Research Institute at UCL (H.Z.), London, UK; and Hong Kong Center for Neurodegenerative Diseases (H.Z.), China
| | - Troels W Kjaer
- From Neurology (L.G., T.C., N.M.-C., M.M.-K.), Clinical Neurophysiology (S.B., E.W.), Cardiology (J.D.), and Anaesthesia and Intensive Care (H.F.), Department of Clinical Sciences Lund, Lund University, Skåne University Hospital, Malmö; Department of Psychiatry and Neurochemistry (K.B., H.Z.), Institute of Neuroscience and Physiology, the Sahlgrenska Academy, University of Gothenburg; Clinical Neurochemistry Laboratory (K.B., H.Z.), Sahlgrenska University Hospital, Mölndal, Sweden; Department of Cardiology (C.H.), Rigshospitalet and Department of Clinical Medicine, University of Copenhagen, Denmark; Departments of Intensive Care (J.H.) and Neurology/Clinical Neurophysiology (A.-F-V.R.), Amsterdam Neuroscience, Amsterdam UMC, Academic Medical Center, University of Amsterdam, the Netherlands; Departments of Clinical Neurophysiology (T.W.K.) and Cardiology (J.K.), Rigshospitalet University Hospital, Copenhagen, Denmark; Department of Intensive Care (M.K.), Medical Center Leeuwarden, the Netherlands; Clinical Memory Research Unit, Faculty of Medicine (N.M.-C.), and Wallenberg Centre for Molecular Medicine (N.M.-C.), Lund University; Anaesthesia and Intensive Care, Department of Clinical Sciences Lund (N.N.), Lund University, Helsingborg Hospital, Sweden; Department of Neurology (A.O.R.), CHUV and University of Lausanne, Switzerland; Department of Anesthesia and Intensive Care (P.S.), Centre Hospitalier de Luxembourg; Department of Life Sciences and Medicine (P.S.), Faculty of Science, Technology and Medicine, University of Luxembourg; Clinical Studies Sweden (S.U.), Skåne University Hospital, Lund; Department of Neurodegenerative Disease (H.Z.), UCL Institute of Neurology; UK Dementia Research Institute at UCL (H.Z.), London, UK; and Hong Kong Center for Neurodegenerative Diseases (H.Z.), China
| | - Jesper Kjaergaard
- From Neurology (L.G., T.C., N.M.-C., M.M.-K.), Clinical Neurophysiology (S.B., E.W.), Cardiology (J.D.), and Anaesthesia and Intensive Care (H.F.), Department of Clinical Sciences Lund, Lund University, Skåne University Hospital, Malmö; Department of Psychiatry and Neurochemistry (K.B., H.Z.), Institute of Neuroscience and Physiology, the Sahlgrenska Academy, University of Gothenburg; Clinical Neurochemistry Laboratory (K.B., H.Z.), Sahlgrenska University Hospital, Mölndal, Sweden; Department of Cardiology (C.H.), Rigshospitalet and Department of Clinical Medicine, University of Copenhagen, Denmark; Departments of Intensive Care (J.H.) and Neurology/Clinical Neurophysiology (A.-F-V.R.), Amsterdam Neuroscience, Amsterdam UMC, Academic Medical Center, University of Amsterdam, the Netherlands; Departments of Clinical Neurophysiology (T.W.K.) and Cardiology (J.K.), Rigshospitalet University Hospital, Copenhagen, Denmark; Department of Intensive Care (M.K.), Medical Center Leeuwarden, the Netherlands; Clinical Memory Research Unit, Faculty of Medicine (N.M.-C.), and Wallenberg Centre for Molecular Medicine (N.M.-C.), Lund University; Anaesthesia and Intensive Care, Department of Clinical Sciences Lund (N.N.), Lund University, Helsingborg Hospital, Sweden; Department of Neurology (A.O.R.), CHUV and University of Lausanne, Switzerland; Department of Anesthesia and Intensive Care (P.S.), Centre Hospitalier de Luxembourg; Department of Life Sciences and Medicine (P.S.), Faculty of Science, Technology and Medicine, University of Luxembourg; Clinical Studies Sweden (S.U.), Skåne University Hospital, Lund; Department of Neurodegenerative Disease (H.Z.), UCL Institute of Neurology; UK Dementia Research Institute at UCL (H.Z.), London, UK; and Hong Kong Center for Neurodegenerative Diseases (H.Z.), China
| | - Michael Kuiper
- From Neurology (L.G., T.C., N.M.-C., M.M.-K.), Clinical Neurophysiology (S.B., E.W.), Cardiology (J.D.), and Anaesthesia and Intensive Care (H.F.), Department of Clinical Sciences Lund, Lund University, Skåne University Hospital, Malmö; Department of Psychiatry and Neurochemistry (K.B., H.Z.), Institute of Neuroscience and Physiology, the Sahlgrenska Academy, University of Gothenburg; Clinical Neurochemistry Laboratory (K.B., H.Z.), Sahlgrenska University Hospital, Mölndal, Sweden; Department of Cardiology (C.H.), Rigshospitalet and Department of Clinical Medicine, University of Copenhagen, Denmark; Departments of Intensive Care (J.H.) and Neurology/Clinical Neurophysiology (A.-F-V.R.), Amsterdam Neuroscience, Amsterdam UMC, Academic Medical Center, University of Amsterdam, the Netherlands; Departments of Clinical Neurophysiology (T.W.K.) and Cardiology (J.K.), Rigshospitalet University Hospital, Copenhagen, Denmark; Department of Intensive Care (M.K.), Medical Center Leeuwarden, the Netherlands; Clinical Memory Research Unit, Faculty of Medicine (N.M.-C.), and Wallenberg Centre for Molecular Medicine (N.M.-C.), Lund University; Anaesthesia and Intensive Care, Department of Clinical Sciences Lund (N.N.), Lund University, Helsingborg Hospital, Sweden; Department of Neurology (A.O.R.), CHUV and University of Lausanne, Switzerland; Department of Anesthesia and Intensive Care (P.S.), Centre Hospitalier de Luxembourg; Department of Life Sciences and Medicine (P.S.), Faculty of Science, Technology and Medicine, University of Luxembourg; Clinical Studies Sweden (S.U.), Skåne University Hospital, Lund; Department of Neurodegenerative Disease (H.Z.), UCL Institute of Neurology; UK Dementia Research Institute at UCL (H.Z.), London, UK; and Hong Kong Center for Neurodegenerative Diseases (H.Z.), China
| | - Niklas Mattsson-Carlgren
- From Neurology (L.G., T.C., N.M.-C., M.M.-K.), Clinical Neurophysiology (S.B., E.W.), Cardiology (J.D.), and Anaesthesia and Intensive Care (H.F.), Department of Clinical Sciences Lund, Lund University, Skåne University Hospital, Malmö; Department of Psychiatry and Neurochemistry (K.B., H.Z.), Institute of Neuroscience and Physiology, the Sahlgrenska Academy, University of Gothenburg; Clinical Neurochemistry Laboratory (K.B., H.Z.), Sahlgrenska University Hospital, Mölndal, Sweden; Department of Cardiology (C.H.), Rigshospitalet and Department of Clinical Medicine, University of Copenhagen, Denmark; Departments of Intensive Care (J.H.) and Neurology/Clinical Neurophysiology (A.-F-V.R.), Amsterdam Neuroscience, Amsterdam UMC, Academic Medical Center, University of Amsterdam, the Netherlands; Departments of Clinical Neurophysiology (T.W.K.) and Cardiology (J.K.), Rigshospitalet University Hospital, Copenhagen, Denmark; Department of Intensive Care (M.K.), Medical Center Leeuwarden, the Netherlands; Clinical Memory Research Unit, Faculty of Medicine (N.M.-C.), and Wallenberg Centre for Molecular Medicine (N.M.-C.), Lund University; Anaesthesia and Intensive Care, Department of Clinical Sciences Lund (N.N.), Lund University, Helsingborg Hospital, Sweden; Department of Neurology (A.O.R.), CHUV and University of Lausanne, Switzerland; Department of Anesthesia and Intensive Care (P.S.), Centre Hospitalier de Luxembourg; Department of Life Sciences and Medicine (P.S.), Faculty of Science, Technology and Medicine, University of Luxembourg; Clinical Studies Sweden (S.U.), Skåne University Hospital, Lund; Department of Neurodegenerative Disease (H.Z.), UCL Institute of Neurology; UK Dementia Research Institute at UCL (H.Z.), London, UK; and Hong Kong Center for Neurodegenerative Diseases (H.Z.), China
| | - Niklas Nielsen
- From Neurology (L.G., T.C., N.M.-C., M.M.-K.), Clinical Neurophysiology (S.B., E.W.), Cardiology (J.D.), and Anaesthesia and Intensive Care (H.F.), Department of Clinical Sciences Lund, Lund University, Skåne University Hospital, Malmö; Department of Psychiatry and Neurochemistry (K.B., H.Z.), Institute of Neuroscience and Physiology, the Sahlgrenska Academy, University of Gothenburg; Clinical Neurochemistry Laboratory (K.B., H.Z.), Sahlgrenska University Hospital, Mölndal, Sweden; Department of Cardiology (C.H.), Rigshospitalet and Department of Clinical Medicine, University of Copenhagen, Denmark; Departments of Intensive Care (J.H.) and Neurology/Clinical Neurophysiology (A.-F-V.R.), Amsterdam Neuroscience, Amsterdam UMC, Academic Medical Center, University of Amsterdam, the Netherlands; Departments of Clinical Neurophysiology (T.W.K.) and Cardiology (J.K.), Rigshospitalet University Hospital, Copenhagen, Denmark; Department of Intensive Care (M.K.), Medical Center Leeuwarden, the Netherlands; Clinical Memory Research Unit, Faculty of Medicine (N.M.-C.), and Wallenberg Centre for Molecular Medicine (N.M.-C.), Lund University; Anaesthesia and Intensive Care, Department of Clinical Sciences Lund (N.N.), Lund University, Helsingborg Hospital, Sweden; Department of Neurology (A.O.R.), CHUV and University of Lausanne, Switzerland; Department of Anesthesia and Intensive Care (P.S.), Centre Hospitalier de Luxembourg; Department of Life Sciences and Medicine (P.S.), Faculty of Science, Technology and Medicine, University of Luxembourg; Clinical Studies Sweden (S.U.), Skåne University Hospital, Lund; Department of Neurodegenerative Disease (H.Z.), UCL Institute of Neurology; UK Dementia Research Institute at UCL (H.Z.), London, UK; and Hong Kong Center for Neurodegenerative Diseases (H.Z.), China
| | - Anne-Fleur van Rootselaar
- From Neurology (L.G., T.C., N.M.-C., M.M.-K.), Clinical Neurophysiology (S.B., E.W.), Cardiology (J.D.), and Anaesthesia and Intensive Care (H.F.), Department of Clinical Sciences Lund, Lund University, Skåne University Hospital, Malmö; Department of Psychiatry and Neurochemistry (K.B., H.Z.), Institute of Neuroscience and Physiology, the Sahlgrenska Academy, University of Gothenburg; Clinical Neurochemistry Laboratory (K.B., H.Z.), Sahlgrenska University Hospital, Mölndal, Sweden; Department of Cardiology (C.H.), Rigshospitalet and Department of Clinical Medicine, University of Copenhagen, Denmark; Departments of Intensive Care (J.H.) and Neurology/Clinical Neurophysiology (A.-F-V.R.), Amsterdam Neuroscience, Amsterdam UMC, Academic Medical Center, University of Amsterdam, the Netherlands; Departments of Clinical Neurophysiology (T.W.K.) and Cardiology (J.K.), Rigshospitalet University Hospital, Copenhagen, Denmark; Department of Intensive Care (M.K.), Medical Center Leeuwarden, the Netherlands; Clinical Memory Research Unit, Faculty of Medicine (N.M.-C.), and Wallenberg Centre for Molecular Medicine (N.M.-C.), Lund University; Anaesthesia and Intensive Care, Department of Clinical Sciences Lund (N.N.), Lund University, Helsingborg Hospital, Sweden; Department of Neurology (A.O.R.), CHUV and University of Lausanne, Switzerland; Department of Anesthesia and Intensive Care (P.S.), Centre Hospitalier de Luxembourg; Department of Life Sciences and Medicine (P.S.), Faculty of Science, Technology and Medicine, University of Luxembourg; Clinical Studies Sweden (S.U.), Skåne University Hospital, Lund; Department of Neurodegenerative Disease (H.Z.), UCL Institute of Neurology; UK Dementia Research Institute at UCL (H.Z.), London, UK; and Hong Kong Center for Neurodegenerative Diseases (H.Z.), China
| | - Andrea O Rossetti
- From Neurology (L.G., T.C., N.M.-C., M.M.-K.), Clinical Neurophysiology (S.B., E.W.), Cardiology (J.D.), and Anaesthesia and Intensive Care (H.F.), Department of Clinical Sciences Lund, Lund University, Skåne University Hospital, Malmö; Department of Psychiatry and Neurochemistry (K.B., H.Z.), Institute of Neuroscience and Physiology, the Sahlgrenska Academy, University of Gothenburg; Clinical Neurochemistry Laboratory (K.B., H.Z.), Sahlgrenska University Hospital, Mölndal, Sweden; Department of Cardiology (C.H.), Rigshospitalet and Department of Clinical Medicine, University of Copenhagen, Denmark; Departments of Intensive Care (J.H.) and Neurology/Clinical Neurophysiology (A.-F-V.R.), Amsterdam Neuroscience, Amsterdam UMC, Academic Medical Center, University of Amsterdam, the Netherlands; Departments of Clinical Neurophysiology (T.W.K.) and Cardiology (J.K.), Rigshospitalet University Hospital, Copenhagen, Denmark; Department of Intensive Care (M.K.), Medical Center Leeuwarden, the Netherlands; Clinical Memory Research Unit, Faculty of Medicine (N.M.-C.), and Wallenberg Centre for Molecular Medicine (N.M.-C.), Lund University; Anaesthesia and Intensive Care, Department of Clinical Sciences Lund (N.N.), Lund University, Helsingborg Hospital, Sweden; Department of Neurology (A.O.R.), CHUV and University of Lausanne, Switzerland; Department of Anesthesia and Intensive Care (P.S.), Centre Hospitalier de Luxembourg; Department of Life Sciences and Medicine (P.S.), Faculty of Science, Technology and Medicine, University of Luxembourg; Clinical Studies Sweden (S.U.), Skåne University Hospital, Lund; Department of Neurodegenerative Disease (H.Z.), UCL Institute of Neurology; UK Dementia Research Institute at UCL (H.Z.), London, UK; and Hong Kong Center for Neurodegenerative Diseases (H.Z.), China
| | - Pascal Stammet
- From Neurology (L.G., T.C., N.M.-C., M.M.-K.), Clinical Neurophysiology (S.B., E.W.), Cardiology (J.D.), and Anaesthesia and Intensive Care (H.F.), Department of Clinical Sciences Lund, Lund University, Skåne University Hospital, Malmö; Department of Psychiatry and Neurochemistry (K.B., H.Z.), Institute of Neuroscience and Physiology, the Sahlgrenska Academy, University of Gothenburg; Clinical Neurochemistry Laboratory (K.B., H.Z.), Sahlgrenska University Hospital, Mölndal, Sweden; Department of Cardiology (C.H.), Rigshospitalet and Department of Clinical Medicine, University of Copenhagen, Denmark; Departments of Intensive Care (J.H.) and Neurology/Clinical Neurophysiology (A.-F-V.R.), Amsterdam Neuroscience, Amsterdam UMC, Academic Medical Center, University of Amsterdam, the Netherlands; Departments of Clinical Neurophysiology (T.W.K.) and Cardiology (J.K.), Rigshospitalet University Hospital, Copenhagen, Denmark; Department of Intensive Care (M.K.), Medical Center Leeuwarden, the Netherlands; Clinical Memory Research Unit, Faculty of Medicine (N.M.-C.), and Wallenberg Centre for Molecular Medicine (N.M.-C.), Lund University; Anaesthesia and Intensive Care, Department of Clinical Sciences Lund (N.N.), Lund University, Helsingborg Hospital, Sweden; Department of Neurology (A.O.R.), CHUV and University of Lausanne, Switzerland; Department of Anesthesia and Intensive Care (P.S.), Centre Hospitalier de Luxembourg; Department of Life Sciences and Medicine (P.S.), Faculty of Science, Technology and Medicine, University of Luxembourg; Clinical Studies Sweden (S.U.), Skåne University Hospital, Lund; Department of Neurodegenerative Disease (H.Z.), UCL Institute of Neurology; UK Dementia Research Institute at UCL (H.Z.), London, UK; and Hong Kong Center for Neurodegenerative Diseases (H.Z.), China
| | - Susann Ullén
- From Neurology (L.G., T.C., N.M.-C., M.M.-K.), Clinical Neurophysiology (S.B., E.W.), Cardiology (J.D.), and Anaesthesia and Intensive Care (H.F.), Department of Clinical Sciences Lund, Lund University, Skåne University Hospital, Malmö; Department of Psychiatry and Neurochemistry (K.B., H.Z.), Institute of Neuroscience and Physiology, the Sahlgrenska Academy, University of Gothenburg; Clinical Neurochemistry Laboratory (K.B., H.Z.), Sahlgrenska University Hospital, Mölndal, Sweden; Department of Cardiology (C.H.), Rigshospitalet and Department of Clinical Medicine, University of Copenhagen, Denmark; Departments of Intensive Care (J.H.) and Neurology/Clinical Neurophysiology (A.-F-V.R.), Amsterdam Neuroscience, Amsterdam UMC, Academic Medical Center, University of Amsterdam, the Netherlands; Departments of Clinical Neurophysiology (T.W.K.) and Cardiology (J.K.), Rigshospitalet University Hospital, Copenhagen, Denmark; Department of Intensive Care (M.K.), Medical Center Leeuwarden, the Netherlands; Clinical Memory Research Unit, Faculty of Medicine (N.M.-C.), and Wallenberg Centre for Molecular Medicine (N.M.-C.), Lund University; Anaesthesia and Intensive Care, Department of Clinical Sciences Lund (N.N.), Lund University, Helsingborg Hospital, Sweden; Department of Neurology (A.O.R.), CHUV and University of Lausanne, Switzerland; Department of Anesthesia and Intensive Care (P.S.), Centre Hospitalier de Luxembourg; Department of Life Sciences and Medicine (P.S.), Faculty of Science, Technology and Medicine, University of Luxembourg; Clinical Studies Sweden (S.U.), Skåne University Hospital, Lund; Department of Neurodegenerative Disease (H.Z.), UCL Institute of Neurology; UK Dementia Research Institute at UCL (H.Z.), London, UK; and Hong Kong Center for Neurodegenerative Diseases (H.Z.), China
| | - Henrik Zetterberg
- From Neurology (L.G., T.C., N.M.-C., M.M.-K.), Clinical Neurophysiology (S.B., E.W.), Cardiology (J.D.), and Anaesthesia and Intensive Care (H.F.), Department of Clinical Sciences Lund, Lund University, Skåne University Hospital, Malmö; Department of Psychiatry and Neurochemistry (K.B., H.Z.), Institute of Neuroscience and Physiology, the Sahlgrenska Academy, University of Gothenburg; Clinical Neurochemistry Laboratory (K.B., H.Z.), Sahlgrenska University Hospital, Mölndal, Sweden; Department of Cardiology (C.H.), Rigshospitalet and Department of Clinical Medicine, University of Copenhagen, Denmark; Departments of Intensive Care (J.H.) and Neurology/Clinical Neurophysiology (A.-F-V.R.), Amsterdam Neuroscience, Amsterdam UMC, Academic Medical Center, University of Amsterdam, the Netherlands; Departments of Clinical Neurophysiology (T.W.K.) and Cardiology (J.K.), Rigshospitalet University Hospital, Copenhagen, Denmark; Department of Intensive Care (M.K.), Medical Center Leeuwarden, the Netherlands; Clinical Memory Research Unit, Faculty of Medicine (N.M.-C.), and Wallenberg Centre for Molecular Medicine (N.M.-C.), Lund University; Anaesthesia and Intensive Care, Department of Clinical Sciences Lund (N.N.), Lund University, Helsingborg Hospital, Sweden; Department of Neurology (A.O.R.), CHUV and University of Lausanne, Switzerland; Department of Anesthesia and Intensive Care (P.S.), Centre Hospitalier de Luxembourg; Department of Life Sciences and Medicine (P.S.), Faculty of Science, Technology and Medicine, University of Luxembourg; Clinical Studies Sweden (S.U.), Skåne University Hospital, Lund; Department of Neurodegenerative Disease (H.Z.), UCL Institute of Neurology; UK Dementia Research Institute at UCL (H.Z.), London, UK; and Hong Kong Center for Neurodegenerative Diseases (H.Z.), China
| | - Erik Westhall
- From Neurology (L.G., T.C., N.M.-C., M.M.-K.), Clinical Neurophysiology (S.B., E.W.), Cardiology (J.D.), and Anaesthesia and Intensive Care (H.F.), Department of Clinical Sciences Lund, Lund University, Skåne University Hospital, Malmö; Department of Psychiatry and Neurochemistry (K.B., H.Z.), Institute of Neuroscience and Physiology, the Sahlgrenska Academy, University of Gothenburg; Clinical Neurochemistry Laboratory (K.B., H.Z.), Sahlgrenska University Hospital, Mölndal, Sweden; Department of Cardiology (C.H.), Rigshospitalet and Department of Clinical Medicine, University of Copenhagen, Denmark; Departments of Intensive Care (J.H.) and Neurology/Clinical Neurophysiology (A.-F-V.R.), Amsterdam Neuroscience, Amsterdam UMC, Academic Medical Center, University of Amsterdam, the Netherlands; Departments of Clinical Neurophysiology (T.W.K.) and Cardiology (J.K.), Rigshospitalet University Hospital, Copenhagen, Denmark; Department of Intensive Care (M.K.), Medical Center Leeuwarden, the Netherlands; Clinical Memory Research Unit, Faculty of Medicine (N.M.-C.), and Wallenberg Centre for Molecular Medicine (N.M.-C.), Lund University; Anaesthesia and Intensive Care, Department of Clinical Sciences Lund (N.N.), Lund University, Helsingborg Hospital, Sweden; Department of Neurology (A.O.R.), CHUV and University of Lausanne, Switzerland; Department of Anesthesia and Intensive Care (P.S.), Centre Hospitalier de Luxembourg; Department of Life Sciences and Medicine (P.S.), Faculty of Science, Technology and Medicine, University of Luxembourg; Clinical Studies Sweden (S.U.), Skåne University Hospital, Lund; Department of Neurodegenerative Disease (H.Z.), UCL Institute of Neurology; UK Dementia Research Institute at UCL (H.Z.), London, UK; and Hong Kong Center for Neurodegenerative Diseases (H.Z.), China
| | - Marion Moseby-Knappe
- From Neurology (L.G., T.C., N.M.-C., M.M.-K.), Clinical Neurophysiology (S.B., E.W.), Cardiology (J.D.), and Anaesthesia and Intensive Care (H.F.), Department of Clinical Sciences Lund, Lund University, Skåne University Hospital, Malmö; Department of Psychiatry and Neurochemistry (K.B., H.Z.), Institute of Neuroscience and Physiology, the Sahlgrenska Academy, University of Gothenburg; Clinical Neurochemistry Laboratory (K.B., H.Z.), Sahlgrenska University Hospital, Mölndal, Sweden; Department of Cardiology (C.H.), Rigshospitalet and Department of Clinical Medicine, University of Copenhagen, Denmark; Departments of Intensive Care (J.H.) and Neurology/Clinical Neurophysiology (A.-F-V.R.), Amsterdam Neuroscience, Amsterdam UMC, Academic Medical Center, University of Amsterdam, the Netherlands; Departments of Clinical Neurophysiology (T.W.K.) and Cardiology (J.K.), Rigshospitalet University Hospital, Copenhagen, Denmark; Department of Intensive Care (M.K.), Medical Center Leeuwarden, the Netherlands; Clinical Memory Research Unit, Faculty of Medicine (N.M.-C.), and Wallenberg Centre for Molecular Medicine (N.M.-C.), Lund University; Anaesthesia and Intensive Care, Department of Clinical Sciences Lund (N.N.), Lund University, Helsingborg Hospital, Sweden; Department of Neurology (A.O.R.), CHUV and University of Lausanne, Switzerland; Department of Anesthesia and Intensive Care (P.S.), Centre Hospitalier de Luxembourg; Department of Life Sciences and Medicine (P.S.), Faculty of Science, Technology and Medicine, University of Luxembourg; Clinical Studies Sweden (S.U.), Skåne University Hospital, Lund; Department of Neurodegenerative Disease (H.Z.), UCL Institute of Neurology; UK Dementia Research Institute at UCL (H.Z.), London, UK; and Hong Kong Center for Neurodegenerative Diseases (H.Z.), China
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7
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Abstract
PURPOSE Anesthetic agents have been widely used in the treatment of refractory status epilepticus and the medical management of increased intracranial pressure whenever the goal is therapeutic burst suppression. Periodic patterns typically consisting of generalized periodic discharges (GPDs) following emergence from anesthesia have been described in several case reports. However, their clinical significance and in particular whether these patterns are epileptiform remains unclear. METHODS This is a single-center, retrospective, observational study examining EEG patterns following emergence from pharmacologically induced burst suppression. Clinical and EEG data were collected. Patients who developed GPDs following anesthetic wean were compared with those who did not. RESULTS Over 4.5 years, 14 patients developed GPDs related to anesthetic withdrawal. The GPDs had a frequency between 0.5 and 2.5 Hz. Generalized periodic discharges related to anesthetic withdrawal were transient, with a median duration of 40 hours (interquartile range, 24-48 hours). Notably, in all patients, the pattern was stimulus dependent. When compared with a control group of 19 consecutive patients who did not develop a generalized periodic pattern in the context of the anesthetic wean, there was no significant difference in the status epilepticus relapse between the two groups (29% vs. 44%; P = 0.63). Patients in the GPD group were more likely to be on pentobarbital (93% vs. 58%; P = 0.05) and were more likely to have concomitant systemic infection treated with antibiotics compared with the control group (86% vs. 42%; P = 0.02). CONCLUSIONS Generalized periodic patterns are common following the wean of intravenous anesthetics (particularly pentobarbital) and likely represent a transitional encephalopathic state in a subset of patients. Their morphology is distinct and can be differentiated from the reemergence of status epilepticus (if the latter was the indication for anesthetic treatment). Failure to recognize this pattern may lead to prolonged unnecessary treatments if it is mistaken for the emergence of seizure activity. The presence of concomitant systemic infection and associated antibiotic treatment may be risk factors for the development of this pattern.
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8
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Sakathevan J, Somasundaram K, Chinyere SC, Rodríguez-Viña C, Martín-López D. Lateralized Periodic Discharges During Remifentanil Infusion. Clin EEG Neurosci 2022; 53:143-147. [PMID: 33900123 DOI: 10.1177/15500594211010624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Lateralized periodic discharges (LPDs) are a common electroencephalographic (EEG) pattern in the neurointensive care unit setting. LPDs are typically observed in association with acute structural lesions of the brain with different etiologies. There are no reports describing a link between the occurrence of LPDs and the administration of remifentanil. Remifentanil is a rapid-acting pure μ-opioid receptor agonist, which is indicated to provide analgesia and sedation in mechanically ventilated patients in intensive care units. We present a case of an 84-year-old man with neuroglycopenia who developed LPDs while sedated with remifentanil. We report, for the first time, a potential relationship between remifentanil and the induction of LPDs.
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Affiliation(s)
| | | | | | - Cristina Rodríguez-Viña
- 1333Ashford and St Peter's Hospital NHS FT, Chertsey, UK.,4968St George's University Hospitals NHS FT, Chertsey, UK
| | - David Martín-López
- 1333Ashford and St Peter's Hospital NHS FT, Chertsey, UK.,4968St George's University Hospitals NHS FT, Chertsey, UK.,4262Kingston Hospital NHS FT, Chertsey, UK
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9
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Elmer J, Liu C, Pease M, Arefan D, Coppler PJ, Flickinger K, Mettenburg JM, Baldwin ME, Barot N, Wu S. Deep learning of early brain imaging to predict post-arrest electroencephalography. Resuscitation 2022; 172:17-23. [PMID: 35041875 PMCID: PMC8923981 DOI: 10.1016/j.resuscitation.2022.01.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 01/05/2022] [Accepted: 01/06/2022] [Indexed: 10/19/2022]
Abstract
INTRODUCTION Guidelines recommend use of computerized tomography (CT) and electroencephalography (EEG) in post-arrest prognostication. Strong associations between CT and EEG might obviate the need to acquire both modalities. We quantified these associations via deep learning. METHODS We performed a single-center, retrospective study including comatose patients hospitalized after cardiac arrest. We extracted brain CT DICOMs, resized and registered each to a standard anatomical atlas, performed skull stripping and windowed images to optimize contrast of the gray-white junction. We classified initial EEG as generalized suppression, other highly pathological findings or benign activity. We extracted clinical information available on presentation from our prospective registry. We trained three machine learning (ML) models to predict EEG from clinical covariates. We used three state-of-the-art approaches to build multi-headed deep learning models using similar model architectures. Finally, we combined the best performing clinical and imaging models. We evaluated discrimination in test sets. RESULTS We included 500 patients, of whom 218 (44%) had benign EEG findings, 135 (27%) showed generalized suppression and 147 (29%) had other highly pathological findings that were most commonly (93%) burst suppression with identical bursts. Clinical ML models had moderate discrimination (test set AUCs 0.73-0.80). Image-based deep learning performed worse (test set AUCs 0.51-0.69), particularly discriminating benign from highly pathological findings. Adding image-based deep learning to clinical models improved prediction of generalized suppression due to accurate detection of severe cerebral edema. DISCUSSION CT and EEG provide complementary information about post-arrest brain injury. Our results do not support selective acquisition of only one of these modalities, except in the most severely injured patients.
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Affiliation(s)
- Jonathan Elmer
- Department of Emergency Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA; Department of Critical Care Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA; Neurology Division, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.
| | - Chang Liu
- Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, PA, USA
| | - Matthew Pease
- Department of Neurosurgery, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Dooman Arefan
- Department of Radiology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Patrick J. Coppler
- Department of Emergency Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Katharyn Flickinger
- Department of Emergency Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Joseph M. Mettenburg
- Department of Radiology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Maria E. Baldwin
- Department of Neurology, Pittsburgh VA Medical Center, Pittsburgh, PA, USA
| | - Niravkumar Barot
- Department of Neurology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Shandong Wu
- Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, PA, USA,Department of Radiology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA,Department of Biomedical Informatics, University of Pittsburgh, Pittsburgh, PA, USA,Intelligent Systems Program, University of Pittsburgh, Pittsburgh, PA, USA
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10
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Ruijter BJ, Keijzer HM, Tjepkema-Cloostermans MC, Blans MJ, Beishuizen A, Tromp SC, Scholten E, Horn J, van Rootselaar AF, Admiraal MM, van den Bergh WM, Elting JWJ, Foudraine NA, Kornips FHM, van Kranen-Mastenbroek VHJM, Rouhl RPW, Thomeer EC, Moudrous W, Nijhuis FAP, Booij SJ, Hoedemaekers CWE, Doorduin J, Taccone FS, van der Palen J, van Putten MJAM, Hofmeijer J. Treating Rhythmic and Periodic EEG Patterns in Comatose Survivors of Cardiac Arrest. N Engl J Med 2022; 386:724-734. [PMID: 35196426 DOI: 10.1056/nejmoa2115998] [Citation(s) in RCA: 66] [Impact Index Per Article: 33.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
BACKGROUND Whether the treatment of rhythmic and periodic electroencephalographic (EEG) patterns in comatose survivors of cardiac arrest improves outcomes is uncertain. METHODS We conducted an open-label trial of suppressing rhythmic and periodic EEG patterns detected on continuous EEG monitoring in comatose survivors of cardiac arrest. Patients were randomly assigned in a 1:1 ratio to a stepwise strategy of antiseizure medications to suppress this activity for at least 48 consecutive hours plus standard care (antiseizure-treatment group) or to standard care alone (control group); standard care included targeted temperature management in both groups. The primary outcome was neurologic outcome according to the score on the Cerebral Performance Category (CPC) scale at 3 months, dichotomized as a good outcome (CPC score indicating no, mild, or moderate disability) or a poor outcome (CPC score indicating severe disability, coma, or death). Secondary outcomes were mortality, length of stay in the intensive care unit (ICU), and duration of mechanical ventilation. RESULTS We enrolled 172 patients, with 88 assigned to the antiseizure-treatment group and 84 to the control group. Rhythmic or periodic EEG activity was detected a median of 35 hours after cardiac arrest; 98 of 157 patients (62%) with available data had myoclonus. Complete suppression of rhythmic and periodic EEG activity for 48 consecutive hours occurred in 49 of 88 patients (56%) in the antiseizure-treatment group and in 2 of 83 patients (2%) in the control group. At 3 months, 79 of 88 patients (90%) in the antiseizure-treatment group and 77 of 84 patients (92%) in the control group had a poor outcome (difference, 2 percentage points; 95% confidence interval, -7 to 11; P = 0.68). Mortality at 3 months was 80% in the antiseizure-treatment group and 82% in the control group. The mean length of stay in the ICU and mean duration of mechanical ventilation were slightly longer in the antiseizure-treatment group than in the control group. CONCLUSIONS In comatose survivors of cardiac arrest, the incidence of a poor neurologic outcome at 3 months did not differ significantly between a strategy of suppressing rhythmic and periodic EEG activity with the use of antiseizure medication for at least 48 hours plus standard care and standard care alone. (Funded by the Dutch Epilepsy Foundation; TELSTAR ClinicalTrials.gov number, NCT02056236.).
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Affiliation(s)
- Barry J Ruijter
- From the Department of Clinical Neurophysiology, Technical Medical Center (B.J.R., M.C.T.-C., M.J.A.M.P., J. Hofmeijer), and the Section of Cognition, Data, and Education (J.P.), University of Twente, and the Departments of Neurology and Clinical Neurophysiology (M.C.T.-C., M.J.A.M.P.), the Intensive Care Center (A.B.), and the Department of Epidemiology (J.P.), Medisch Spectrum Twente, Enschede, the Departments of Neurology (H.M.K., J. Hofmeijer) and Intensive Care (M.J.B.), Rijnstate Hospital, Arnhem, the Departments of Intensive Care Medicine (H.M.K., C.W.E.H.) and Neurology (H.M.K., J.D.) and the Donders Institute for Brain, Cognition, and Behavior (H.M.K.), Radboud University Medical Center, and the Department of Neurology, Canisius Wilhelmina Hospital (F.A.P.N., S.J.B.), Nijmegen, the Departments of Neurology and Clinical Neurophysiology (S.C.T.) and Intensive Care (E.S.), St. Antonius Hospital, Nieuwegein, the Department of Neurology, Leiden University Medical Center, Leiden (S.C.T.), the Amsterdam Coma Group (J. Horn, A.-F.R., M.M.A.), the Department of Intensive Care (J. Horn), and the Department of Neurology and Clinical Neurophysiology (A.-F.R., M.M.A.), Amsterdam University Medical Center, Amsterdam, the Departments of Critical Care (W.M.B.) and Neurology and Clinical Neurophysiology (J.W.J.E.), University Medical Center Groningen, University of Groningen, Groningen, the Departments of Intensive Care (N.A.F.) and Neurology (F.H.M.K.), VieCuri Medical Center, Venlo, the Departments of Clinical Neurophysiology (V.H.J.M.K.-M.) and Neurology (R.P.W.R.), Maastricht University Medical Center, and the Academic Center for Epileptology Kempenhaeghe and Maastricht UMC+ (V.H.J.M.K.-M., R.P.W.R.), Maastricht, and the Department of Neurology, Maasstad Hospital, Rotterdam (E.C.T., W.M.) - all in the Netherlands; and the Department of Intensive Care, Erasme University Hospital, Université Libre de Bruxelles, Brussels (F.S.T.)
| | - Hanneke M Keijzer
- From the Department of Clinical Neurophysiology, Technical Medical Center (B.J.R., M.C.T.-C., M.J.A.M.P., J. Hofmeijer), and the Section of Cognition, Data, and Education (J.P.), University of Twente, and the Departments of Neurology and Clinical Neurophysiology (M.C.T.-C., M.J.A.M.P.), the Intensive Care Center (A.B.), and the Department of Epidemiology (J.P.), Medisch Spectrum Twente, Enschede, the Departments of Neurology (H.M.K., J. Hofmeijer) and Intensive Care (M.J.B.), Rijnstate Hospital, Arnhem, the Departments of Intensive Care Medicine (H.M.K., C.W.E.H.) and Neurology (H.M.K., J.D.) and the Donders Institute for Brain, Cognition, and Behavior (H.M.K.), Radboud University Medical Center, and the Department of Neurology, Canisius Wilhelmina Hospital (F.A.P.N., S.J.B.), Nijmegen, the Departments of Neurology and Clinical Neurophysiology (S.C.T.) and Intensive Care (E.S.), St. Antonius Hospital, Nieuwegein, the Department of Neurology, Leiden University Medical Center, Leiden (S.C.T.), the Amsterdam Coma Group (J. Horn, A.-F.R., M.M.A.), the Department of Intensive Care (J. Horn), and the Department of Neurology and Clinical Neurophysiology (A.-F.R., M.M.A.), Amsterdam University Medical Center, Amsterdam, the Departments of Critical Care (W.M.B.) and Neurology and Clinical Neurophysiology (J.W.J.E.), University Medical Center Groningen, University of Groningen, Groningen, the Departments of Intensive Care (N.A.F.) and Neurology (F.H.M.K.), VieCuri Medical Center, Venlo, the Departments of Clinical Neurophysiology (V.H.J.M.K.-M.) and Neurology (R.P.W.R.), Maastricht University Medical Center, and the Academic Center for Epileptology Kempenhaeghe and Maastricht UMC+ (V.H.J.M.K.-M., R.P.W.R.), Maastricht, and the Department of Neurology, Maasstad Hospital, Rotterdam (E.C.T., W.M.) - all in the Netherlands; and the Department of Intensive Care, Erasme University Hospital, Université Libre de Bruxelles, Brussels (F.S.T.)
| | - Marleen C Tjepkema-Cloostermans
- From the Department of Clinical Neurophysiology, Technical Medical Center (B.J.R., M.C.T.-C., M.J.A.M.P., J. Hofmeijer), and the Section of Cognition, Data, and Education (J.P.), University of Twente, and the Departments of Neurology and Clinical Neurophysiology (M.C.T.-C., M.J.A.M.P.), the Intensive Care Center (A.B.), and the Department of Epidemiology (J.P.), Medisch Spectrum Twente, Enschede, the Departments of Neurology (H.M.K., J. Hofmeijer) and Intensive Care (M.J.B.), Rijnstate Hospital, Arnhem, the Departments of Intensive Care Medicine (H.M.K., C.W.E.H.) and Neurology (H.M.K., J.D.) and the Donders Institute for Brain, Cognition, and Behavior (H.M.K.), Radboud University Medical Center, and the Department of Neurology, Canisius Wilhelmina Hospital (F.A.P.N., S.J.B.), Nijmegen, the Departments of Neurology and Clinical Neurophysiology (S.C.T.) and Intensive Care (E.S.), St. Antonius Hospital, Nieuwegein, the Department of Neurology, Leiden University Medical Center, Leiden (S.C.T.), the Amsterdam Coma Group (J. Horn, A.-F.R., M.M.A.), the Department of Intensive Care (J. Horn), and the Department of Neurology and Clinical Neurophysiology (A.-F.R., M.M.A.), Amsterdam University Medical Center, Amsterdam, the Departments of Critical Care (W.M.B.) and Neurology and Clinical Neurophysiology (J.W.J.E.), University Medical Center Groningen, University of Groningen, Groningen, the Departments of Intensive Care (N.A.F.) and Neurology (F.H.M.K.), VieCuri Medical Center, Venlo, the Departments of Clinical Neurophysiology (V.H.J.M.K.-M.) and Neurology (R.P.W.R.), Maastricht University Medical Center, and the Academic Center for Epileptology Kempenhaeghe and Maastricht UMC+ (V.H.J.M.K.-M., R.P.W.R.), Maastricht, and the Department of Neurology, Maasstad Hospital, Rotterdam (E.C.T., W.M.) - all in the Netherlands; and the Department of Intensive Care, Erasme University Hospital, Université Libre de Bruxelles, Brussels (F.S.T.)
| | - Michiel J Blans
- From the Department of Clinical Neurophysiology, Technical Medical Center (B.J.R., M.C.T.-C., M.J.A.M.P., J. Hofmeijer), and the Section of Cognition, Data, and Education (J.P.), University of Twente, and the Departments of Neurology and Clinical Neurophysiology (M.C.T.-C., M.J.A.M.P.), the Intensive Care Center (A.B.), and the Department of Epidemiology (J.P.), Medisch Spectrum Twente, Enschede, the Departments of Neurology (H.M.K., J. Hofmeijer) and Intensive Care (M.J.B.), Rijnstate Hospital, Arnhem, the Departments of Intensive Care Medicine (H.M.K., C.W.E.H.) and Neurology (H.M.K., J.D.) and the Donders Institute for Brain, Cognition, and Behavior (H.M.K.), Radboud University Medical Center, and the Department of Neurology, Canisius Wilhelmina Hospital (F.A.P.N., S.J.B.), Nijmegen, the Departments of Neurology and Clinical Neurophysiology (S.C.T.) and Intensive Care (E.S.), St. Antonius Hospital, Nieuwegein, the Department of Neurology, Leiden University Medical Center, Leiden (S.C.T.), the Amsterdam Coma Group (J. Horn, A.-F.R., M.M.A.), the Department of Intensive Care (J. Horn), and the Department of Neurology and Clinical Neurophysiology (A.-F.R., M.M.A.), Amsterdam University Medical Center, Amsterdam, the Departments of Critical Care (W.M.B.) and Neurology and Clinical Neurophysiology (J.W.J.E.), University Medical Center Groningen, University of Groningen, Groningen, the Departments of Intensive Care (N.A.F.) and Neurology (F.H.M.K.), VieCuri Medical Center, Venlo, the Departments of Clinical Neurophysiology (V.H.J.M.K.-M.) and Neurology (R.P.W.R.), Maastricht University Medical Center, and the Academic Center for Epileptology Kempenhaeghe and Maastricht UMC+ (V.H.J.M.K.-M., R.P.W.R.), Maastricht, and the Department of Neurology, Maasstad Hospital, Rotterdam (E.C.T., W.M.) - all in the Netherlands; and the Department of Intensive Care, Erasme University Hospital, Université Libre de Bruxelles, Brussels (F.S.T.)
| | - Albertus Beishuizen
- From the Department of Clinical Neurophysiology, Technical Medical Center (B.J.R., M.C.T.-C., M.J.A.M.P., J. Hofmeijer), and the Section of Cognition, Data, and Education (J.P.), University of Twente, and the Departments of Neurology and Clinical Neurophysiology (M.C.T.-C., M.J.A.M.P.), the Intensive Care Center (A.B.), and the Department of Epidemiology (J.P.), Medisch Spectrum Twente, Enschede, the Departments of Neurology (H.M.K., J. Hofmeijer) and Intensive Care (M.J.B.), Rijnstate Hospital, Arnhem, the Departments of Intensive Care Medicine (H.M.K., C.W.E.H.) and Neurology (H.M.K., J.D.) and the Donders Institute for Brain, Cognition, and Behavior (H.M.K.), Radboud University Medical Center, and the Department of Neurology, Canisius Wilhelmina Hospital (F.A.P.N., S.J.B.), Nijmegen, the Departments of Neurology and Clinical Neurophysiology (S.C.T.) and Intensive Care (E.S.), St. Antonius Hospital, Nieuwegein, the Department of Neurology, Leiden University Medical Center, Leiden (S.C.T.), the Amsterdam Coma Group (J. Horn, A.-F.R., M.M.A.), the Department of Intensive Care (J. Horn), and the Department of Neurology and Clinical Neurophysiology (A.-F.R., M.M.A.), Amsterdam University Medical Center, Amsterdam, the Departments of Critical Care (W.M.B.) and Neurology and Clinical Neurophysiology (J.W.J.E.), University Medical Center Groningen, University of Groningen, Groningen, the Departments of Intensive Care (N.A.F.) and Neurology (F.H.M.K.), VieCuri Medical Center, Venlo, the Departments of Clinical Neurophysiology (V.H.J.M.K.-M.) and Neurology (R.P.W.R.), Maastricht University Medical Center, and the Academic Center for Epileptology Kempenhaeghe and Maastricht UMC+ (V.H.J.M.K.-M., R.P.W.R.), Maastricht, and the Department of Neurology, Maasstad Hospital, Rotterdam (E.C.T., W.M.) - all in the Netherlands; and the Department of Intensive Care, Erasme University Hospital, Université Libre de Bruxelles, Brussels (F.S.T.)
| | - Selma C Tromp
- From the Department of Clinical Neurophysiology, Technical Medical Center (B.J.R., M.C.T.-C., M.J.A.M.P., J. Hofmeijer), and the Section of Cognition, Data, and Education (J.P.), University of Twente, and the Departments of Neurology and Clinical Neurophysiology (M.C.T.-C., M.J.A.M.P.), the Intensive Care Center (A.B.), and the Department of Epidemiology (J.P.), Medisch Spectrum Twente, Enschede, the Departments of Neurology (H.M.K., J. Hofmeijer) and Intensive Care (M.J.B.), Rijnstate Hospital, Arnhem, the Departments of Intensive Care Medicine (H.M.K., C.W.E.H.) and Neurology (H.M.K., J.D.) and the Donders Institute for Brain, Cognition, and Behavior (H.M.K.), Radboud University Medical Center, and the Department of Neurology, Canisius Wilhelmina Hospital (F.A.P.N., S.J.B.), Nijmegen, the Departments of Neurology and Clinical Neurophysiology (S.C.T.) and Intensive Care (E.S.), St. Antonius Hospital, Nieuwegein, the Department of Neurology, Leiden University Medical Center, Leiden (S.C.T.), the Amsterdam Coma Group (J. Horn, A.-F.R., M.M.A.), the Department of Intensive Care (J. Horn), and the Department of Neurology and Clinical Neurophysiology (A.-F.R., M.M.A.), Amsterdam University Medical Center, Amsterdam, the Departments of Critical Care (W.M.B.) and Neurology and Clinical Neurophysiology (J.W.J.E.), University Medical Center Groningen, University of Groningen, Groningen, the Departments of Intensive Care (N.A.F.) and Neurology (F.H.M.K.), VieCuri Medical Center, Venlo, the Departments of Clinical Neurophysiology (V.H.J.M.K.-M.) and Neurology (R.P.W.R.), Maastricht University Medical Center, and the Academic Center for Epileptology Kempenhaeghe and Maastricht UMC+ (V.H.J.M.K.-M., R.P.W.R.), Maastricht, and the Department of Neurology, Maasstad Hospital, Rotterdam (E.C.T., W.M.) - all in the Netherlands; and the Department of Intensive Care, Erasme University Hospital, Université Libre de Bruxelles, Brussels (F.S.T.)
| | - Erik Scholten
- From the Department of Clinical Neurophysiology, Technical Medical Center (B.J.R., M.C.T.-C., M.J.A.M.P., J. Hofmeijer), and the Section of Cognition, Data, and Education (J.P.), University of Twente, and the Departments of Neurology and Clinical Neurophysiology (M.C.T.-C., M.J.A.M.P.), the Intensive Care Center (A.B.), and the Department of Epidemiology (J.P.), Medisch Spectrum Twente, Enschede, the Departments of Neurology (H.M.K., J. Hofmeijer) and Intensive Care (M.J.B.), Rijnstate Hospital, Arnhem, the Departments of Intensive Care Medicine (H.M.K., C.W.E.H.) and Neurology (H.M.K., J.D.) and the Donders Institute for Brain, Cognition, and Behavior (H.M.K.), Radboud University Medical Center, and the Department of Neurology, Canisius Wilhelmina Hospital (F.A.P.N., S.J.B.), Nijmegen, the Departments of Neurology and Clinical Neurophysiology (S.C.T.) and Intensive Care (E.S.), St. Antonius Hospital, Nieuwegein, the Department of Neurology, Leiden University Medical Center, Leiden (S.C.T.), the Amsterdam Coma Group (J. Horn, A.-F.R., M.M.A.), the Department of Intensive Care (J. Horn), and the Department of Neurology and Clinical Neurophysiology (A.-F.R., M.M.A.), Amsterdam University Medical Center, Amsterdam, the Departments of Critical Care (W.M.B.) and Neurology and Clinical Neurophysiology (J.W.J.E.), University Medical Center Groningen, University of Groningen, Groningen, the Departments of Intensive Care (N.A.F.) and Neurology (F.H.M.K.), VieCuri Medical Center, Venlo, the Departments of Clinical Neurophysiology (V.H.J.M.K.-M.) and Neurology (R.P.W.R.), Maastricht University Medical Center, and the Academic Center for Epileptology Kempenhaeghe and Maastricht UMC+ (V.H.J.M.K.-M., R.P.W.R.), Maastricht, and the Department of Neurology, Maasstad Hospital, Rotterdam (E.C.T., W.M.) - all in the Netherlands; and the Department of Intensive Care, Erasme University Hospital, Université Libre de Bruxelles, Brussels (F.S.T.)
| | - Janneke Horn
- From the Department of Clinical Neurophysiology, Technical Medical Center (B.J.R., M.C.T.-C., M.J.A.M.P., J. Hofmeijer), and the Section of Cognition, Data, and Education (J.P.), University of Twente, and the Departments of Neurology and Clinical Neurophysiology (M.C.T.-C., M.J.A.M.P.), the Intensive Care Center (A.B.), and the Department of Epidemiology (J.P.), Medisch Spectrum Twente, Enschede, the Departments of Neurology (H.M.K., J. Hofmeijer) and Intensive Care (M.J.B.), Rijnstate Hospital, Arnhem, the Departments of Intensive Care Medicine (H.M.K., C.W.E.H.) and Neurology (H.M.K., J.D.) and the Donders Institute for Brain, Cognition, and Behavior (H.M.K.), Radboud University Medical Center, and the Department of Neurology, Canisius Wilhelmina Hospital (F.A.P.N., S.J.B.), Nijmegen, the Departments of Neurology and Clinical Neurophysiology (S.C.T.) and Intensive Care (E.S.), St. Antonius Hospital, Nieuwegein, the Department of Neurology, Leiden University Medical Center, Leiden (S.C.T.), the Amsterdam Coma Group (J. Horn, A.-F.R., M.M.A.), the Department of Intensive Care (J. Horn), and the Department of Neurology and Clinical Neurophysiology (A.-F.R., M.M.A.), Amsterdam University Medical Center, Amsterdam, the Departments of Critical Care (W.M.B.) and Neurology and Clinical Neurophysiology (J.W.J.E.), University Medical Center Groningen, University of Groningen, Groningen, the Departments of Intensive Care (N.A.F.) and Neurology (F.H.M.K.), VieCuri Medical Center, Venlo, the Departments of Clinical Neurophysiology (V.H.J.M.K.-M.) and Neurology (R.P.W.R.), Maastricht University Medical Center, and the Academic Center for Epileptology Kempenhaeghe and Maastricht UMC+ (V.H.J.M.K.-M., R.P.W.R.), Maastricht, and the Department of Neurology, Maasstad Hospital, Rotterdam (E.C.T., W.M.) - all in the Netherlands; and the Department of Intensive Care, Erasme University Hospital, Université Libre de Bruxelles, Brussels (F.S.T.)
| | - Anne-Fleur van Rootselaar
- From the Department of Clinical Neurophysiology, Technical Medical Center (B.J.R., M.C.T.-C., M.J.A.M.P., J. Hofmeijer), and the Section of Cognition, Data, and Education (J.P.), University of Twente, and the Departments of Neurology and Clinical Neurophysiology (M.C.T.-C., M.J.A.M.P.), the Intensive Care Center (A.B.), and the Department of Epidemiology (J.P.), Medisch Spectrum Twente, Enschede, the Departments of Neurology (H.M.K., J. Hofmeijer) and Intensive Care (M.J.B.), Rijnstate Hospital, Arnhem, the Departments of Intensive Care Medicine (H.M.K., C.W.E.H.) and Neurology (H.M.K., J.D.) and the Donders Institute for Brain, Cognition, and Behavior (H.M.K.), Radboud University Medical Center, and the Department of Neurology, Canisius Wilhelmina Hospital (F.A.P.N., S.J.B.), Nijmegen, the Departments of Neurology and Clinical Neurophysiology (S.C.T.) and Intensive Care (E.S.), St. Antonius Hospital, Nieuwegein, the Department of Neurology, Leiden University Medical Center, Leiden (S.C.T.), the Amsterdam Coma Group (J. Horn, A.-F.R., M.M.A.), the Department of Intensive Care (J. Horn), and the Department of Neurology and Clinical Neurophysiology (A.-F.R., M.M.A.), Amsterdam University Medical Center, Amsterdam, the Departments of Critical Care (W.M.B.) and Neurology and Clinical Neurophysiology (J.W.J.E.), University Medical Center Groningen, University of Groningen, Groningen, the Departments of Intensive Care (N.A.F.) and Neurology (F.H.M.K.), VieCuri Medical Center, Venlo, the Departments of Clinical Neurophysiology (V.H.J.M.K.-M.) and Neurology (R.P.W.R.), Maastricht University Medical Center, and the Academic Center for Epileptology Kempenhaeghe and Maastricht UMC+ (V.H.J.M.K.-M., R.P.W.R.), Maastricht, and the Department of Neurology, Maasstad Hospital, Rotterdam (E.C.T., W.M.) - all in the Netherlands; and the Department of Intensive Care, Erasme University Hospital, Université Libre de Bruxelles, Brussels (F.S.T.)
| | - Marjolein M Admiraal
- From the Department of Clinical Neurophysiology, Technical Medical Center (B.J.R., M.C.T.-C., M.J.A.M.P., J. Hofmeijer), and the Section of Cognition, Data, and Education (J.P.), University of Twente, and the Departments of Neurology and Clinical Neurophysiology (M.C.T.-C., M.J.A.M.P.), the Intensive Care Center (A.B.), and the Department of Epidemiology (J.P.), Medisch Spectrum Twente, Enschede, the Departments of Neurology (H.M.K., J. Hofmeijer) and Intensive Care (M.J.B.), Rijnstate Hospital, Arnhem, the Departments of Intensive Care Medicine (H.M.K., C.W.E.H.) and Neurology (H.M.K., J.D.) and the Donders Institute for Brain, Cognition, and Behavior (H.M.K.), Radboud University Medical Center, and the Department of Neurology, Canisius Wilhelmina Hospital (F.A.P.N., S.J.B.), Nijmegen, the Departments of Neurology and Clinical Neurophysiology (S.C.T.) and Intensive Care (E.S.), St. Antonius Hospital, Nieuwegein, the Department of Neurology, Leiden University Medical Center, Leiden (S.C.T.), the Amsterdam Coma Group (J. Horn, A.-F.R., M.M.A.), the Department of Intensive Care (J. Horn), and the Department of Neurology and Clinical Neurophysiology (A.-F.R., M.M.A.), Amsterdam University Medical Center, Amsterdam, the Departments of Critical Care (W.M.B.) and Neurology and Clinical Neurophysiology (J.W.J.E.), University Medical Center Groningen, University of Groningen, Groningen, the Departments of Intensive Care (N.A.F.) and Neurology (F.H.M.K.), VieCuri Medical Center, Venlo, the Departments of Clinical Neurophysiology (V.H.J.M.K.-M.) and Neurology (R.P.W.R.), Maastricht University Medical Center, and the Academic Center for Epileptology Kempenhaeghe and Maastricht UMC+ (V.H.J.M.K.-M., R.P.W.R.), Maastricht, and the Department of Neurology, Maasstad Hospital, Rotterdam (E.C.T., W.M.) - all in the Netherlands; and the Department of Intensive Care, Erasme University Hospital, Université Libre de Bruxelles, Brussels (F.S.T.)
| | - Walter M van den Bergh
- From the Department of Clinical Neurophysiology, Technical Medical Center (B.J.R., M.C.T.-C., M.J.A.M.P., J. Hofmeijer), and the Section of Cognition, Data, and Education (J.P.), University of Twente, and the Departments of Neurology and Clinical Neurophysiology (M.C.T.-C., M.J.A.M.P.), the Intensive Care Center (A.B.), and the Department of Epidemiology (J.P.), Medisch Spectrum Twente, Enschede, the Departments of Neurology (H.M.K., J. Hofmeijer) and Intensive Care (M.J.B.), Rijnstate Hospital, Arnhem, the Departments of Intensive Care Medicine (H.M.K., C.W.E.H.) and Neurology (H.M.K., J.D.) and the Donders Institute for Brain, Cognition, and Behavior (H.M.K.), Radboud University Medical Center, and the Department of Neurology, Canisius Wilhelmina Hospital (F.A.P.N., S.J.B.), Nijmegen, the Departments of Neurology and Clinical Neurophysiology (S.C.T.) and Intensive Care (E.S.), St. Antonius Hospital, Nieuwegein, the Department of Neurology, Leiden University Medical Center, Leiden (S.C.T.), the Amsterdam Coma Group (J. Horn, A.-F.R., M.M.A.), the Department of Intensive Care (J. Horn), and the Department of Neurology and Clinical Neurophysiology (A.-F.R., M.M.A.), Amsterdam University Medical Center, Amsterdam, the Departments of Critical Care (W.M.B.) and Neurology and Clinical Neurophysiology (J.W.J.E.), University Medical Center Groningen, University of Groningen, Groningen, the Departments of Intensive Care (N.A.F.) and Neurology (F.H.M.K.), VieCuri Medical Center, Venlo, the Departments of Clinical Neurophysiology (V.H.J.M.K.-M.) and Neurology (R.P.W.R.), Maastricht University Medical Center, and the Academic Center for Epileptology Kempenhaeghe and Maastricht UMC+ (V.H.J.M.K.-M., R.P.W.R.), Maastricht, and the Department of Neurology, Maasstad Hospital, Rotterdam (E.C.T., W.M.) - all in the Netherlands; and the Department of Intensive Care, Erasme University Hospital, Université Libre de Bruxelles, Brussels (F.S.T.)
| | - Jan-Willem J Elting
- From the Department of Clinical Neurophysiology, Technical Medical Center (B.J.R., M.C.T.-C., M.J.A.M.P., J. Hofmeijer), and the Section of Cognition, Data, and Education (J.P.), University of Twente, and the Departments of Neurology and Clinical Neurophysiology (M.C.T.-C., M.J.A.M.P.), the Intensive Care Center (A.B.), and the Department of Epidemiology (J.P.), Medisch Spectrum Twente, Enschede, the Departments of Neurology (H.M.K., J. Hofmeijer) and Intensive Care (M.J.B.), Rijnstate Hospital, Arnhem, the Departments of Intensive Care Medicine (H.M.K., C.W.E.H.) and Neurology (H.M.K., J.D.) and the Donders Institute for Brain, Cognition, and Behavior (H.M.K.), Radboud University Medical Center, and the Department of Neurology, Canisius Wilhelmina Hospital (F.A.P.N., S.J.B.), Nijmegen, the Departments of Neurology and Clinical Neurophysiology (S.C.T.) and Intensive Care (E.S.), St. Antonius Hospital, Nieuwegein, the Department of Neurology, Leiden University Medical Center, Leiden (S.C.T.), the Amsterdam Coma Group (J. Horn, A.-F.R., M.M.A.), the Department of Intensive Care (J. Horn), and the Department of Neurology and Clinical Neurophysiology (A.-F.R., M.M.A.), Amsterdam University Medical Center, Amsterdam, the Departments of Critical Care (W.M.B.) and Neurology and Clinical Neurophysiology (J.W.J.E.), University Medical Center Groningen, University of Groningen, Groningen, the Departments of Intensive Care (N.A.F.) and Neurology (F.H.M.K.), VieCuri Medical Center, Venlo, the Departments of Clinical Neurophysiology (V.H.J.M.K.-M.) and Neurology (R.P.W.R.), Maastricht University Medical Center, and the Academic Center for Epileptology Kempenhaeghe and Maastricht UMC+ (V.H.J.M.K.-M., R.P.W.R.), Maastricht, and the Department of Neurology, Maasstad Hospital, Rotterdam (E.C.T., W.M.) - all in the Netherlands; and the Department of Intensive Care, Erasme University Hospital, Université Libre de Bruxelles, Brussels (F.S.T.)
| | - Norbert A Foudraine
- From the Department of Clinical Neurophysiology, Technical Medical Center (B.J.R., M.C.T.-C., M.J.A.M.P., J. Hofmeijer), and the Section of Cognition, Data, and Education (J.P.), University of Twente, and the Departments of Neurology and Clinical Neurophysiology (M.C.T.-C., M.J.A.M.P.), the Intensive Care Center (A.B.), and the Department of Epidemiology (J.P.), Medisch Spectrum Twente, Enschede, the Departments of Neurology (H.M.K., J. Hofmeijer) and Intensive Care (M.J.B.), Rijnstate Hospital, Arnhem, the Departments of Intensive Care Medicine (H.M.K., C.W.E.H.) and Neurology (H.M.K., J.D.) and the Donders Institute for Brain, Cognition, and Behavior (H.M.K.), Radboud University Medical Center, and the Department of Neurology, Canisius Wilhelmina Hospital (F.A.P.N., S.J.B.), Nijmegen, the Departments of Neurology and Clinical Neurophysiology (S.C.T.) and Intensive Care (E.S.), St. Antonius Hospital, Nieuwegein, the Department of Neurology, Leiden University Medical Center, Leiden (S.C.T.), the Amsterdam Coma Group (J. Horn, A.-F.R., M.M.A.), the Department of Intensive Care (J. Horn), and the Department of Neurology and Clinical Neurophysiology (A.-F.R., M.M.A.), Amsterdam University Medical Center, Amsterdam, the Departments of Critical Care (W.M.B.) and Neurology and Clinical Neurophysiology (J.W.J.E.), University Medical Center Groningen, University of Groningen, Groningen, the Departments of Intensive Care (N.A.F.) and Neurology (F.H.M.K.), VieCuri Medical Center, Venlo, the Departments of Clinical Neurophysiology (V.H.J.M.K.-M.) and Neurology (R.P.W.R.), Maastricht University Medical Center, and the Academic Center for Epileptology Kempenhaeghe and Maastricht UMC+ (V.H.J.M.K.-M., R.P.W.R.), Maastricht, and the Department of Neurology, Maasstad Hospital, Rotterdam (E.C.T., W.M.) - all in the Netherlands; and the Department of Intensive Care, Erasme University Hospital, Université Libre de Bruxelles, Brussels (F.S.T.)
| | - Francois H M Kornips
- From the Department of Clinical Neurophysiology, Technical Medical Center (B.J.R., M.C.T.-C., M.J.A.M.P., J. Hofmeijer), and the Section of Cognition, Data, and Education (J.P.), University of Twente, and the Departments of Neurology and Clinical Neurophysiology (M.C.T.-C., M.J.A.M.P.), the Intensive Care Center (A.B.), and the Department of Epidemiology (J.P.), Medisch Spectrum Twente, Enschede, the Departments of Neurology (H.M.K., J. Hofmeijer) and Intensive Care (M.J.B.), Rijnstate Hospital, Arnhem, the Departments of Intensive Care Medicine (H.M.K., C.W.E.H.) and Neurology (H.M.K., J.D.) and the Donders Institute for Brain, Cognition, and Behavior (H.M.K.), Radboud University Medical Center, and the Department of Neurology, Canisius Wilhelmina Hospital (F.A.P.N., S.J.B.), Nijmegen, the Departments of Neurology and Clinical Neurophysiology (S.C.T.) and Intensive Care (E.S.), St. Antonius Hospital, Nieuwegein, the Department of Neurology, Leiden University Medical Center, Leiden (S.C.T.), the Amsterdam Coma Group (J. Horn, A.-F.R., M.M.A.), the Department of Intensive Care (J. Horn), and the Department of Neurology and Clinical Neurophysiology (A.-F.R., M.M.A.), Amsterdam University Medical Center, Amsterdam, the Departments of Critical Care (W.M.B.) and Neurology and Clinical Neurophysiology (J.W.J.E.), University Medical Center Groningen, University of Groningen, Groningen, the Departments of Intensive Care (N.A.F.) and Neurology (F.H.M.K.), VieCuri Medical Center, Venlo, the Departments of Clinical Neurophysiology (V.H.J.M.K.-M.) and Neurology (R.P.W.R.), Maastricht University Medical Center, and the Academic Center for Epileptology Kempenhaeghe and Maastricht UMC+ (V.H.J.M.K.-M., R.P.W.R.), Maastricht, and the Department of Neurology, Maasstad Hospital, Rotterdam (E.C.T., W.M.) - all in the Netherlands; and the Department of Intensive Care, Erasme University Hospital, Université Libre de Bruxelles, Brussels (F.S.T.)
| | - Vivianne H J M van Kranen-Mastenbroek
- From the Department of Clinical Neurophysiology, Technical Medical Center (B.J.R., M.C.T.-C., M.J.A.M.P., J. Hofmeijer), and the Section of Cognition, Data, and Education (J.P.), University of Twente, and the Departments of Neurology and Clinical Neurophysiology (M.C.T.-C., M.J.A.M.P.), the Intensive Care Center (A.B.), and the Department of Epidemiology (J.P.), Medisch Spectrum Twente, Enschede, the Departments of Neurology (H.M.K., J. Hofmeijer) and Intensive Care (M.J.B.), Rijnstate Hospital, Arnhem, the Departments of Intensive Care Medicine (H.M.K., C.W.E.H.) and Neurology (H.M.K., J.D.) and the Donders Institute for Brain, Cognition, and Behavior (H.M.K.), Radboud University Medical Center, and the Department of Neurology, Canisius Wilhelmina Hospital (F.A.P.N., S.J.B.), Nijmegen, the Departments of Neurology and Clinical Neurophysiology (S.C.T.) and Intensive Care (E.S.), St. Antonius Hospital, Nieuwegein, the Department of Neurology, Leiden University Medical Center, Leiden (S.C.T.), the Amsterdam Coma Group (J. Horn, A.-F.R., M.M.A.), the Department of Intensive Care (J. Horn), and the Department of Neurology and Clinical Neurophysiology (A.-F.R., M.M.A.), Amsterdam University Medical Center, Amsterdam, the Departments of Critical Care (W.M.B.) and Neurology and Clinical Neurophysiology (J.W.J.E.), University Medical Center Groningen, University of Groningen, Groningen, the Departments of Intensive Care (N.A.F.) and Neurology (F.H.M.K.), VieCuri Medical Center, Venlo, the Departments of Clinical Neurophysiology (V.H.J.M.K.-M.) and Neurology (R.P.W.R.), Maastricht University Medical Center, and the Academic Center for Epileptology Kempenhaeghe and Maastricht UMC+ (V.H.J.M.K.-M., R.P.W.R.), Maastricht, and the Department of Neurology, Maasstad Hospital, Rotterdam (E.C.T., W.M.) - all in the Netherlands; and the Department of Intensive Care, Erasme University Hospital, Université Libre de Bruxelles, Brussels (F.S.T.)
| | - Rob P W Rouhl
- From the Department of Clinical Neurophysiology, Technical Medical Center (B.J.R., M.C.T.-C., M.J.A.M.P., J. Hofmeijer), and the Section of Cognition, Data, and Education (J.P.), University of Twente, and the Departments of Neurology and Clinical Neurophysiology (M.C.T.-C., M.J.A.M.P.), the Intensive Care Center (A.B.), and the Department of Epidemiology (J.P.), Medisch Spectrum Twente, Enschede, the Departments of Neurology (H.M.K., J. Hofmeijer) and Intensive Care (M.J.B.), Rijnstate Hospital, Arnhem, the Departments of Intensive Care Medicine (H.M.K., C.W.E.H.) and Neurology (H.M.K., J.D.) and the Donders Institute for Brain, Cognition, and Behavior (H.M.K.), Radboud University Medical Center, and the Department of Neurology, Canisius Wilhelmina Hospital (F.A.P.N., S.J.B.), Nijmegen, the Departments of Neurology and Clinical Neurophysiology (S.C.T.) and Intensive Care (E.S.), St. Antonius Hospital, Nieuwegein, the Department of Neurology, Leiden University Medical Center, Leiden (S.C.T.), the Amsterdam Coma Group (J. Horn, A.-F.R., M.M.A.), the Department of Intensive Care (J. Horn), and the Department of Neurology and Clinical Neurophysiology (A.-F.R., M.M.A.), Amsterdam University Medical Center, Amsterdam, the Departments of Critical Care (W.M.B.) and Neurology and Clinical Neurophysiology (J.W.J.E.), University Medical Center Groningen, University of Groningen, Groningen, the Departments of Intensive Care (N.A.F.) and Neurology (F.H.M.K.), VieCuri Medical Center, Venlo, the Departments of Clinical Neurophysiology (V.H.J.M.K.-M.) and Neurology (R.P.W.R.), Maastricht University Medical Center, and the Academic Center for Epileptology Kempenhaeghe and Maastricht UMC+ (V.H.J.M.K.-M., R.P.W.R.), Maastricht, and the Department of Neurology, Maasstad Hospital, Rotterdam (E.C.T., W.M.) - all in the Netherlands; and the Department of Intensive Care, Erasme University Hospital, Université Libre de Bruxelles, Brussels (F.S.T.)
| | - Elsbeth C Thomeer
- From the Department of Clinical Neurophysiology, Technical Medical Center (B.J.R., M.C.T.-C., M.J.A.M.P., J. Hofmeijer), and the Section of Cognition, Data, and Education (J.P.), University of Twente, and the Departments of Neurology and Clinical Neurophysiology (M.C.T.-C., M.J.A.M.P.), the Intensive Care Center (A.B.), and the Department of Epidemiology (J.P.), Medisch Spectrum Twente, Enschede, the Departments of Neurology (H.M.K., J. Hofmeijer) and Intensive Care (M.J.B.), Rijnstate Hospital, Arnhem, the Departments of Intensive Care Medicine (H.M.K., C.W.E.H.) and Neurology (H.M.K., J.D.) and the Donders Institute for Brain, Cognition, and Behavior (H.M.K.), Radboud University Medical Center, and the Department of Neurology, Canisius Wilhelmina Hospital (F.A.P.N., S.J.B.), Nijmegen, the Departments of Neurology and Clinical Neurophysiology (S.C.T.) and Intensive Care (E.S.), St. Antonius Hospital, Nieuwegein, the Department of Neurology, Leiden University Medical Center, Leiden (S.C.T.), the Amsterdam Coma Group (J. Horn, A.-F.R., M.M.A.), the Department of Intensive Care (J. Horn), and the Department of Neurology and Clinical Neurophysiology (A.-F.R., M.M.A.), Amsterdam University Medical Center, Amsterdam, the Departments of Critical Care (W.M.B.) and Neurology and Clinical Neurophysiology (J.W.J.E.), University Medical Center Groningen, University of Groningen, Groningen, the Departments of Intensive Care (N.A.F.) and Neurology (F.H.M.K.), VieCuri Medical Center, Venlo, the Departments of Clinical Neurophysiology (V.H.J.M.K.-M.) and Neurology (R.P.W.R.), Maastricht University Medical Center, and the Academic Center for Epileptology Kempenhaeghe and Maastricht UMC+ (V.H.J.M.K.-M., R.P.W.R.), Maastricht, and the Department of Neurology, Maasstad Hospital, Rotterdam (E.C.T., W.M.) - all in the Netherlands; and the Department of Intensive Care, Erasme University Hospital, Université Libre de Bruxelles, Brussels (F.S.T.)
| | - Walid Moudrous
- From the Department of Clinical Neurophysiology, Technical Medical Center (B.J.R., M.C.T.-C., M.J.A.M.P., J. Hofmeijer), and the Section of Cognition, Data, and Education (J.P.), University of Twente, and the Departments of Neurology and Clinical Neurophysiology (M.C.T.-C., M.J.A.M.P.), the Intensive Care Center (A.B.), and the Department of Epidemiology (J.P.), Medisch Spectrum Twente, Enschede, the Departments of Neurology (H.M.K., J. Hofmeijer) and Intensive Care (M.J.B.), Rijnstate Hospital, Arnhem, the Departments of Intensive Care Medicine (H.M.K., C.W.E.H.) and Neurology (H.M.K., J.D.) and the Donders Institute for Brain, Cognition, and Behavior (H.M.K.), Radboud University Medical Center, and the Department of Neurology, Canisius Wilhelmina Hospital (F.A.P.N., S.J.B.), Nijmegen, the Departments of Neurology and Clinical Neurophysiology (S.C.T.) and Intensive Care (E.S.), St. Antonius Hospital, Nieuwegein, the Department of Neurology, Leiden University Medical Center, Leiden (S.C.T.), the Amsterdam Coma Group (J. Horn, A.-F.R., M.M.A.), the Department of Intensive Care (J. Horn), and the Department of Neurology and Clinical Neurophysiology (A.-F.R., M.M.A.), Amsterdam University Medical Center, Amsterdam, the Departments of Critical Care (W.M.B.) and Neurology and Clinical Neurophysiology (J.W.J.E.), University Medical Center Groningen, University of Groningen, Groningen, the Departments of Intensive Care (N.A.F.) and Neurology (F.H.M.K.), VieCuri Medical Center, Venlo, the Departments of Clinical Neurophysiology (V.H.J.M.K.-M.) and Neurology (R.P.W.R.), Maastricht University Medical Center, and the Academic Center for Epileptology Kempenhaeghe and Maastricht UMC+ (V.H.J.M.K.-M., R.P.W.R.), Maastricht, and the Department of Neurology, Maasstad Hospital, Rotterdam (E.C.T., W.M.) - all in the Netherlands; and the Department of Intensive Care, Erasme University Hospital, Université Libre de Bruxelles, Brussels (F.S.T.)
| | - Frouke A P Nijhuis
- From the Department of Clinical Neurophysiology, Technical Medical Center (B.J.R., M.C.T.-C., M.J.A.M.P., J. Hofmeijer), and the Section of Cognition, Data, and Education (J.P.), University of Twente, and the Departments of Neurology and Clinical Neurophysiology (M.C.T.-C., M.J.A.M.P.), the Intensive Care Center (A.B.), and the Department of Epidemiology (J.P.), Medisch Spectrum Twente, Enschede, the Departments of Neurology (H.M.K., J. Hofmeijer) and Intensive Care (M.J.B.), Rijnstate Hospital, Arnhem, the Departments of Intensive Care Medicine (H.M.K., C.W.E.H.) and Neurology (H.M.K., J.D.) and the Donders Institute for Brain, Cognition, and Behavior (H.M.K.), Radboud University Medical Center, and the Department of Neurology, Canisius Wilhelmina Hospital (F.A.P.N., S.J.B.), Nijmegen, the Departments of Neurology and Clinical Neurophysiology (S.C.T.) and Intensive Care (E.S.), St. Antonius Hospital, Nieuwegein, the Department of Neurology, Leiden University Medical Center, Leiden (S.C.T.), the Amsterdam Coma Group (J. Horn, A.-F.R., M.M.A.), the Department of Intensive Care (J. Horn), and the Department of Neurology and Clinical Neurophysiology (A.-F.R., M.M.A.), Amsterdam University Medical Center, Amsterdam, the Departments of Critical Care (W.M.B.) and Neurology and Clinical Neurophysiology (J.W.J.E.), University Medical Center Groningen, University of Groningen, Groningen, the Departments of Intensive Care (N.A.F.) and Neurology (F.H.M.K.), VieCuri Medical Center, Venlo, the Departments of Clinical Neurophysiology (V.H.J.M.K.-M.) and Neurology (R.P.W.R.), Maastricht University Medical Center, and the Academic Center for Epileptology Kempenhaeghe and Maastricht UMC+ (V.H.J.M.K.-M., R.P.W.R.), Maastricht, and the Department of Neurology, Maasstad Hospital, Rotterdam (E.C.T., W.M.) - all in the Netherlands; and the Department of Intensive Care, Erasme University Hospital, Université Libre de Bruxelles, Brussels (F.S.T.)
| | - Suzanne J Booij
- From the Department of Clinical Neurophysiology, Technical Medical Center (B.J.R., M.C.T.-C., M.J.A.M.P., J. Hofmeijer), and the Section of Cognition, Data, and Education (J.P.), University of Twente, and the Departments of Neurology and Clinical Neurophysiology (M.C.T.-C., M.J.A.M.P.), the Intensive Care Center (A.B.), and the Department of Epidemiology (J.P.), Medisch Spectrum Twente, Enschede, the Departments of Neurology (H.M.K., J. Hofmeijer) and Intensive Care (M.J.B.), Rijnstate Hospital, Arnhem, the Departments of Intensive Care Medicine (H.M.K., C.W.E.H.) and Neurology (H.M.K., J.D.) and the Donders Institute for Brain, Cognition, and Behavior (H.M.K.), Radboud University Medical Center, and the Department of Neurology, Canisius Wilhelmina Hospital (F.A.P.N., S.J.B.), Nijmegen, the Departments of Neurology and Clinical Neurophysiology (S.C.T.) and Intensive Care (E.S.), St. Antonius Hospital, Nieuwegein, the Department of Neurology, Leiden University Medical Center, Leiden (S.C.T.), the Amsterdam Coma Group (J. Horn, A.-F.R., M.M.A.), the Department of Intensive Care (J. Horn), and the Department of Neurology and Clinical Neurophysiology (A.-F.R., M.M.A.), Amsterdam University Medical Center, Amsterdam, the Departments of Critical Care (W.M.B.) and Neurology and Clinical Neurophysiology (J.W.J.E.), University Medical Center Groningen, University of Groningen, Groningen, the Departments of Intensive Care (N.A.F.) and Neurology (F.H.M.K.), VieCuri Medical Center, Venlo, the Departments of Clinical Neurophysiology (V.H.J.M.K.-M.) and Neurology (R.P.W.R.), Maastricht University Medical Center, and the Academic Center for Epileptology Kempenhaeghe and Maastricht UMC+ (V.H.J.M.K.-M., R.P.W.R.), Maastricht, and the Department of Neurology, Maasstad Hospital, Rotterdam (E.C.T., W.M.) - all in the Netherlands; and the Department of Intensive Care, Erasme University Hospital, Université Libre de Bruxelles, Brussels (F.S.T.)
| | - Cornelia W E Hoedemaekers
- From the Department of Clinical Neurophysiology, Technical Medical Center (B.J.R., M.C.T.-C., M.J.A.M.P., J. Hofmeijer), and the Section of Cognition, Data, and Education (J.P.), University of Twente, and the Departments of Neurology and Clinical Neurophysiology (M.C.T.-C., M.J.A.M.P.), the Intensive Care Center (A.B.), and the Department of Epidemiology (J.P.), Medisch Spectrum Twente, Enschede, the Departments of Neurology (H.M.K., J. Hofmeijer) and Intensive Care (M.J.B.), Rijnstate Hospital, Arnhem, the Departments of Intensive Care Medicine (H.M.K., C.W.E.H.) and Neurology (H.M.K., J.D.) and the Donders Institute for Brain, Cognition, and Behavior (H.M.K.), Radboud University Medical Center, and the Department of Neurology, Canisius Wilhelmina Hospital (F.A.P.N., S.J.B.), Nijmegen, the Departments of Neurology and Clinical Neurophysiology (S.C.T.) and Intensive Care (E.S.), St. Antonius Hospital, Nieuwegein, the Department of Neurology, Leiden University Medical Center, Leiden (S.C.T.), the Amsterdam Coma Group (J. Horn, A.-F.R., M.M.A.), the Department of Intensive Care (J. Horn), and the Department of Neurology and Clinical Neurophysiology (A.-F.R., M.M.A.), Amsterdam University Medical Center, Amsterdam, the Departments of Critical Care (W.M.B.) and Neurology and Clinical Neurophysiology (J.W.J.E.), University Medical Center Groningen, University of Groningen, Groningen, the Departments of Intensive Care (N.A.F.) and Neurology (F.H.M.K.), VieCuri Medical Center, Venlo, the Departments of Clinical Neurophysiology (V.H.J.M.K.-M.) and Neurology (R.P.W.R.), Maastricht University Medical Center, and the Academic Center for Epileptology Kempenhaeghe and Maastricht UMC+ (V.H.J.M.K.-M., R.P.W.R.), Maastricht, and the Department of Neurology, Maasstad Hospital, Rotterdam (E.C.T., W.M.) - all in the Netherlands; and the Department of Intensive Care, Erasme University Hospital, Université Libre de Bruxelles, Brussels (F.S.T.)
| | - Jonne Doorduin
- From the Department of Clinical Neurophysiology, Technical Medical Center (B.J.R., M.C.T.-C., M.J.A.M.P., J. Hofmeijer), and the Section of Cognition, Data, and Education (J.P.), University of Twente, and the Departments of Neurology and Clinical Neurophysiology (M.C.T.-C., M.J.A.M.P.), the Intensive Care Center (A.B.), and the Department of Epidemiology (J.P.), Medisch Spectrum Twente, Enschede, the Departments of Neurology (H.M.K., J. Hofmeijer) and Intensive Care (M.J.B.), Rijnstate Hospital, Arnhem, the Departments of Intensive Care Medicine (H.M.K., C.W.E.H.) and Neurology (H.M.K., J.D.) and the Donders Institute for Brain, Cognition, and Behavior (H.M.K.), Radboud University Medical Center, and the Department of Neurology, Canisius Wilhelmina Hospital (F.A.P.N., S.J.B.), Nijmegen, the Departments of Neurology and Clinical Neurophysiology (S.C.T.) and Intensive Care (E.S.), St. Antonius Hospital, Nieuwegein, the Department of Neurology, Leiden University Medical Center, Leiden (S.C.T.), the Amsterdam Coma Group (J. Horn, A.-F.R., M.M.A.), the Department of Intensive Care (J. Horn), and the Department of Neurology and Clinical Neurophysiology (A.-F.R., M.M.A.), Amsterdam University Medical Center, Amsterdam, the Departments of Critical Care (W.M.B.) and Neurology and Clinical Neurophysiology (J.W.J.E.), University Medical Center Groningen, University of Groningen, Groningen, the Departments of Intensive Care (N.A.F.) and Neurology (F.H.M.K.), VieCuri Medical Center, Venlo, the Departments of Clinical Neurophysiology (V.H.J.M.K.-M.) and Neurology (R.P.W.R.), Maastricht University Medical Center, and the Academic Center for Epileptology Kempenhaeghe and Maastricht UMC+ (V.H.J.M.K.-M., R.P.W.R.), Maastricht, and the Department of Neurology, Maasstad Hospital, Rotterdam (E.C.T., W.M.) - all in the Netherlands; and the Department of Intensive Care, Erasme University Hospital, Université Libre de Bruxelles, Brussels (F.S.T.)
| | - Fabio S Taccone
- From the Department of Clinical Neurophysiology, Technical Medical Center (B.J.R., M.C.T.-C., M.J.A.M.P., J. Hofmeijer), and the Section of Cognition, Data, and Education (J.P.), University of Twente, and the Departments of Neurology and Clinical Neurophysiology (M.C.T.-C., M.J.A.M.P.), the Intensive Care Center (A.B.), and the Department of Epidemiology (J.P.), Medisch Spectrum Twente, Enschede, the Departments of Neurology (H.M.K., J. Hofmeijer) and Intensive Care (M.J.B.), Rijnstate Hospital, Arnhem, the Departments of Intensive Care Medicine (H.M.K., C.W.E.H.) and Neurology (H.M.K., J.D.) and the Donders Institute for Brain, Cognition, and Behavior (H.M.K.), Radboud University Medical Center, and the Department of Neurology, Canisius Wilhelmina Hospital (F.A.P.N., S.J.B.), Nijmegen, the Departments of Neurology and Clinical Neurophysiology (S.C.T.) and Intensive Care (E.S.), St. Antonius Hospital, Nieuwegein, the Department of Neurology, Leiden University Medical Center, Leiden (S.C.T.), the Amsterdam Coma Group (J. Horn, A.-F.R., M.M.A.), the Department of Intensive Care (J. Horn), and the Department of Neurology and Clinical Neurophysiology (A.-F.R., M.M.A.), Amsterdam University Medical Center, Amsterdam, the Departments of Critical Care (W.M.B.) and Neurology and Clinical Neurophysiology (J.W.J.E.), University Medical Center Groningen, University of Groningen, Groningen, the Departments of Intensive Care (N.A.F.) and Neurology (F.H.M.K.), VieCuri Medical Center, Venlo, the Departments of Clinical Neurophysiology (V.H.J.M.K.-M.) and Neurology (R.P.W.R.), Maastricht University Medical Center, and the Academic Center for Epileptology Kempenhaeghe and Maastricht UMC+ (V.H.J.M.K.-M., R.P.W.R.), Maastricht, and the Department of Neurology, Maasstad Hospital, Rotterdam (E.C.T., W.M.) - all in the Netherlands; and the Department of Intensive Care, Erasme University Hospital, Université Libre de Bruxelles, Brussels (F.S.T.)
| | - Job van der Palen
- From the Department of Clinical Neurophysiology, Technical Medical Center (B.J.R., M.C.T.-C., M.J.A.M.P., J. Hofmeijer), and the Section of Cognition, Data, and Education (J.P.), University of Twente, and the Departments of Neurology and Clinical Neurophysiology (M.C.T.-C., M.J.A.M.P.), the Intensive Care Center (A.B.), and the Department of Epidemiology (J.P.), Medisch Spectrum Twente, Enschede, the Departments of Neurology (H.M.K., J. Hofmeijer) and Intensive Care (M.J.B.), Rijnstate Hospital, Arnhem, the Departments of Intensive Care Medicine (H.M.K., C.W.E.H.) and Neurology (H.M.K., J.D.) and the Donders Institute for Brain, Cognition, and Behavior (H.M.K.), Radboud University Medical Center, and the Department of Neurology, Canisius Wilhelmina Hospital (F.A.P.N., S.J.B.), Nijmegen, the Departments of Neurology and Clinical Neurophysiology (S.C.T.) and Intensive Care (E.S.), St. Antonius Hospital, Nieuwegein, the Department of Neurology, Leiden University Medical Center, Leiden (S.C.T.), the Amsterdam Coma Group (J. Horn, A.-F.R., M.M.A.), the Department of Intensive Care (J. Horn), and the Department of Neurology and Clinical Neurophysiology (A.-F.R., M.M.A.), Amsterdam University Medical Center, Amsterdam, the Departments of Critical Care (W.M.B.) and Neurology and Clinical Neurophysiology (J.W.J.E.), University Medical Center Groningen, University of Groningen, Groningen, the Departments of Intensive Care (N.A.F.) and Neurology (F.H.M.K.), VieCuri Medical Center, Venlo, the Departments of Clinical Neurophysiology (V.H.J.M.K.-M.) and Neurology (R.P.W.R.), Maastricht University Medical Center, and the Academic Center for Epileptology Kempenhaeghe and Maastricht UMC+ (V.H.J.M.K.-M., R.P.W.R.), Maastricht, and the Department of Neurology, Maasstad Hospital, Rotterdam (E.C.T., W.M.) - all in the Netherlands; and the Department of Intensive Care, Erasme University Hospital, Université Libre de Bruxelles, Brussels (F.S.T.)
| | - Michel J A M van Putten
- From the Department of Clinical Neurophysiology, Technical Medical Center (B.J.R., M.C.T.-C., M.J.A.M.P., J. Hofmeijer), and the Section of Cognition, Data, and Education (J.P.), University of Twente, and the Departments of Neurology and Clinical Neurophysiology (M.C.T.-C., M.J.A.M.P.), the Intensive Care Center (A.B.), and the Department of Epidemiology (J.P.), Medisch Spectrum Twente, Enschede, the Departments of Neurology (H.M.K., J. Hofmeijer) and Intensive Care (M.J.B.), Rijnstate Hospital, Arnhem, the Departments of Intensive Care Medicine (H.M.K., C.W.E.H.) and Neurology (H.M.K., J.D.) and the Donders Institute for Brain, Cognition, and Behavior (H.M.K.), Radboud University Medical Center, and the Department of Neurology, Canisius Wilhelmina Hospital (F.A.P.N., S.J.B.), Nijmegen, the Departments of Neurology and Clinical Neurophysiology (S.C.T.) and Intensive Care (E.S.), St. Antonius Hospital, Nieuwegein, the Department of Neurology, Leiden University Medical Center, Leiden (S.C.T.), the Amsterdam Coma Group (J. Horn, A.-F.R., M.M.A.), the Department of Intensive Care (J. Horn), and the Department of Neurology and Clinical Neurophysiology (A.-F.R., M.M.A.), Amsterdam University Medical Center, Amsterdam, the Departments of Critical Care (W.M.B.) and Neurology and Clinical Neurophysiology (J.W.J.E.), University Medical Center Groningen, University of Groningen, Groningen, the Departments of Intensive Care (N.A.F.) and Neurology (F.H.M.K.), VieCuri Medical Center, Venlo, the Departments of Clinical Neurophysiology (V.H.J.M.K.-M.) and Neurology (R.P.W.R.), Maastricht University Medical Center, and the Academic Center for Epileptology Kempenhaeghe and Maastricht UMC+ (V.H.J.M.K.-M., R.P.W.R.), Maastricht, and the Department of Neurology, Maasstad Hospital, Rotterdam (E.C.T., W.M.) - all in the Netherlands; and the Department of Intensive Care, Erasme University Hospital, Université Libre de Bruxelles, Brussels (F.S.T.)
| | - Jeannette Hofmeijer
- From the Department of Clinical Neurophysiology, Technical Medical Center (B.J.R., M.C.T.-C., M.J.A.M.P., J. Hofmeijer), and the Section of Cognition, Data, and Education (J.P.), University of Twente, and the Departments of Neurology and Clinical Neurophysiology (M.C.T.-C., M.J.A.M.P.), the Intensive Care Center (A.B.), and the Department of Epidemiology (J.P.), Medisch Spectrum Twente, Enschede, the Departments of Neurology (H.M.K., J. Hofmeijer) and Intensive Care (M.J.B.), Rijnstate Hospital, Arnhem, the Departments of Intensive Care Medicine (H.M.K., C.W.E.H.) and Neurology (H.M.K., J.D.) and the Donders Institute for Brain, Cognition, and Behavior (H.M.K.), Radboud University Medical Center, and the Department of Neurology, Canisius Wilhelmina Hospital (F.A.P.N., S.J.B.), Nijmegen, the Departments of Neurology and Clinical Neurophysiology (S.C.T.) and Intensive Care (E.S.), St. Antonius Hospital, Nieuwegein, the Department of Neurology, Leiden University Medical Center, Leiden (S.C.T.), the Amsterdam Coma Group (J. Horn, A.-F.R., M.M.A.), the Department of Intensive Care (J. Horn), and the Department of Neurology and Clinical Neurophysiology (A.-F.R., M.M.A.), Amsterdam University Medical Center, Amsterdam, the Departments of Critical Care (W.M.B.) and Neurology and Clinical Neurophysiology (J.W.J.E.), University Medical Center Groningen, University of Groningen, Groningen, the Departments of Intensive Care (N.A.F.) and Neurology (F.H.M.K.), VieCuri Medical Center, Venlo, the Departments of Clinical Neurophysiology (V.H.J.M.K.-M.) and Neurology (R.P.W.R.), Maastricht University Medical Center, and the Academic Center for Epileptology Kempenhaeghe and Maastricht UMC+ (V.H.J.M.K.-M., R.P.W.R.), Maastricht, and the Department of Neurology, Maasstad Hospital, Rotterdam (E.C.T., W.M.) - all in the Netherlands; and the Department of Intensive Care, Erasme University Hospital, Université Libre de Bruxelles, Brussels (F.S.T.)
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Shen Z, Zhang H, Cao Z, Yan L, Zhao Y, Du L, Deng Z. Transition dynamics and optogenetic controls of generalized periodic epileptiform discharges. Neural Netw 2022; 149:1-17. [DOI: 10.1016/j.neunet.2022.01.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 12/25/2021] [Accepted: 01/29/2022] [Indexed: 10/19/2022]
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Foreman B. Can We Distinguish Triphasic Waves From Other Generalized Periodic Discharges? Do We Need to? J Clin Neurophysiol 2021; 38:362-365. [PMID: 34155184 DOI: 10.1097/wnp.0000000000000765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
SUMMARY Triphasic waves are intuitively distinctive waveforms that fall under the umbrella of generalized periodic discharges. The ability to distinguish these waveforms consistently could be helpful if a specific underlying pathophysiology could be identified. However, scalp EEG and clinical observation have been limited in their ability to elucidate the underlying cortical physiology that leads to triphasic waves. Evidence from intracranial physiologic data and computational modeling suggest that these and other periodic discharges should be viewed not as strictly ictal nor non-ictal but rather on the spectrum between these two. Triphasic waves in particular appear to result from an abnormal balance between cortical excitation and synaptic transmission with input from functionally connected brain networks, such as the thalamocortical pathways involved in arousal. The practical implication of triphasic waves begins with acknowledgement of uncertainty and a rational approach should ask whether the pattern-or its treatment-might be creating harm.
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Affiliation(s)
- Brandon Foreman
- Department of Neurology & Rehabilitation Medicine, University of Cincinnati, Cincinnati, Ohio, U.S.A
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13
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Endisch C, Westhall E, Kenda M, Streitberger KJ, Kirkegaard H, Stenzel W, Storm C, Ploner CJ, Cronberg T, Friberg H, Englund E, Leithner C. Hypoxic-Ischemic Encephalopathy Evaluated by Brain Autopsy and Neuroprognostication After Cardiac Arrest. JAMA Neurol 2021; 77:1430-1439. [PMID: 32687592 DOI: 10.1001/jamaneurol.2020.2340] [Citation(s) in RCA: 49] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Importance Neuroprognostication studies are potentially susceptible to a self-fulfilling prophecy as investigated prognostic parameters may affect withdrawal of life-sustaining therapy. Objective To compare the results of prognostic parameters after cardiac arrest (CA) with the histopathologically determined severity of hypoxic-ischemic encephalopathy (HIE) obtained from autopsy results. Design, Setting, and Participants In a retrospective, 3-center cohort study of all patients who died following cardiac arrest during their intensive care unit stay and underwent autopsy between 2003 and 2015, postmortem brain histopathologic findings were compared with post-CA brain computed tomographic imaging, electroencephalographic (EEG) findings, somatosensory-evoked potentials, and serum neuron-specific enolase levels obtained during the intensive care unit stay. Data analysis was conducted from 2015 to 2020. Main Outcomes and Measures The severity of HIE was evaluated according to the selective eosinophilic neuronal death (SEND) classification and patients were dichotomized into categories of histopathologically severe and no/mild HIE. Results Of 187 included patients, 117 were men (63%) and median age was 65 (interquartile range, 58-74) years. Severe HIE was found in 114 patients (61%) and no/mild HIE was identified in 73 patients (39%). Severe HIE was found in all 21 patients with bilaterally absent somatosensory-evoked potentials, all 15 patients with gray-white matter ratio less than 1.10 on brain computed tomographic imaging, all 9 patients with suppressed EEG, 15 of 16 patients with burst-suppression EEG, and all 29 patients with neuron-specific enolase levels greater than 67 μg/L more than 48 hours after CA without confounders. Three of 7 patients with generalized periodic discharges on suppressed background and 1 patient with burst-suppression EEG had a SEND 1 score (<30% dead neurons) in the cerebral cortex, but higher SEND scores (>30% dead neurons) in other oxygen-sensitive brain regions. Conclusions and Relevance In this study, histopathologic findings suggested severe HIE after cardiac arrest in patients with bilaterally absent cortical somatosensory-evoked potentials, gray-white matter ratio less than 1.10, highly malignant EEG, and serum neuron-specific enolase concentration greater than 67 μg/L.
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Affiliation(s)
- Christian Endisch
- AG Emergency and Critical Care Neurology, Campus Virchow Klinikum, Department of Neurology, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Erik Westhall
- Clinical Neurophysiology, Skane University Hospital, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
| | - Martin Kenda
- AG Emergency and Critical Care Neurology, Campus Virchow Klinikum, Department of Neurology, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Kaspar J Streitberger
- AG Emergency and Critical Care Neurology, Campus Virchow Klinikum, Department of Neurology, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Hans Kirkegaard
- Research Center for Emergency Medicine, Aarhus University Hospital, Aarhus University, Aarhus, Denmark
| | - Werner Stenzel
- Charité Campus Mitte, Department of Neuropathology, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Christian Storm
- Cardiac Arrest Center of Excellence Berlin, Campus Virchow Klinikum, Department of Nephrology and Intensive Care Medicine, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Christoph J Ploner
- AG Emergency and Critical Care Neurology, Campus Virchow Klinikum, Department of Neurology, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Tobias Cronberg
- Neurology, Skane University Hospital, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
| | - Hans Friberg
- Intensive and Perioperative Care, Skane University Hospital, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
| | - Elisabet Englund
- Oncology and Pathology, Skane University Hospital, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
| | - Christoph Leithner
- AG Emergency and Critical Care Neurology, Campus Virchow Klinikum, Department of Neurology, Charité Universitätsmedizin Berlin, Berlin, Germany
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14
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Doerrfuss JI, Kowski AB, Holtkamp M, Thinius M, Leithner C, Storm C. Prognostic value of 'late' electroencephalography recordings in patients with cardiopulmonal resuscitation after cardiac arrest. J Neurol 2021; 268:4248-4257. [PMID: 33871711 PMCID: PMC8505381 DOI: 10.1007/s00415-021-10549-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Revised: 04/02/2021] [Accepted: 04/05/2021] [Indexed: 11/20/2022]
Abstract
Background Electroencephalography (EEG) significantly contributes to the neuroprognostication after resuscitation from cardiac arrest. Recent studies suggest that the prognostic value of EEG is highest for continuous recording within the first days after cardiac arrest. Early continuous EEG, however, is not available in all hospitals. In this observational study, we sought to evaluate the predictive value of a ‘late’ EEG recording 5–14 days after cardiac arrest without sedatives. Methods We retrospectively analyzed EEG data in consecutive adult patients treated at the medical intensive care units (ICU) of the Charité—Universitätsmedizin Berlin. Outcome was assessed as cerebral performance category (CPC) at discharge from ICU, with an unfavorable outcome being defined as CPC 4 and 5. Results In 187 patients, a ‘late’ EEG recording was performed. Of these patients, 127 were without continuous administration of sedative agents for at least 24 h before the EEG recording. In this patient group, a continuously suppressed background activity < 10 µV predicted an unfavorable outcome with a sensitivity of 31% (95% confidence interval (CI) 20–45) and a specificity of 99% (95% CI 91–100). In patients with suppressed background activity and generalized periodic discharges, sensitivity was 15% (95% CI 7–27) and specificity was 100% (95% CI 94–100). GPDs on unsuppressed background activity were associated with a sensitivity of 42% (95% CI 29–46) and a specificity of 92% (95% CI 82–97). Conclusions A ‘late’ EEG performed 5 to 14 days after resuscitation from cardiac arrest can aide in prognosticating functional outcome. A suppressed EEG background activity in this time period indicates poor outcome. Supplementary Information The online version contains supplementary material available at 10.1007/s00415-021-10549-y.
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Affiliation(s)
- Jakob I Doerrfuss
- Department of Neurology and Experimental Neurology, Charité-Universitätsmedizin Berlin, Berlin, Germany.
| | - Alexander B Kowski
- Department of Neurology and Experimental Neurology, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Martin Holtkamp
- Department of Neurology and Experimental Neurology, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Moritz Thinius
- Department of Neurology and Experimental Neurology, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Christoph Leithner
- Department of Neurology and Experimental Neurology, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Christian Storm
- Department of Nephrology and Medical Intensive Care, Charité-Universitätsmedizin Berlin, Berlin, Germany
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15
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Maciel CB, Legriel S. Considering postanoxic status epilepticus as a potential modifiable factor and treatment target: A step forward. Resuscitation 2020; 158:279-281. [PMID: 33253765 DOI: 10.1016/j.resuscitation.2020.11.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Accepted: 11/20/2020] [Indexed: 12/01/2022]
Affiliation(s)
- Carolina B Maciel
- Department of Neurology, Division of Neurocritical Care, University of Florida College of Medicine, Gainesville, FL 32611, USA; Department of Neurology, Yale University School of Medicine, New Haven, CT 06520, USA; Department of Neurology, University of Utah, Salt Lake City, UT 84132, USA
| | - Stephane Legriel
- Intensive Care Unit, Centre Hospitalier de Versailles, Le Chesnay 78150, France; IctalGroup, Le Chesnay 78150, France; AfterROSC, Paris 75014, France; University Paris-Saclay, UVSQ, INSERM, CESP, Villejuif 94800, France.
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16
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Miyashiro L, Oliveira DE Paulo C, Twardowschy CA. Presence of generalized periodic discharges and hospital mortality. ARQUIVOS DE NEURO-PSIQUIATRIA 2020; 78:356-360. [PMID: 32401832 DOI: 10.1590/0004-282x20200026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Accepted: 02/19/2020] [Indexed: 11/21/2022]
Abstract
BACKGROUND Generalized periodic discharges (GPDs) are rare patterns that can be found in long-term electroencephalographic monitoring in critical patients. These patterns have been correlated with non-seizure crisis and non-convulsive status epilepticus, associated with poor prognosis. OBJECTIVE To compare the outcome between patients who developed GPDs and patients with other abnormalities in long-term electroencephalographic monitoring. METHODS A retrospective study was performed by analyzing the medical records of 112 patients over 18 years who developed GPDs during long-term electroencephalographic monitoring (12‒16 hours of monitoring) in the intensive care unit of a general hospital, compared with a group that had only nonspecific abnormalities in the monitoring. RESULTS Age and cardiorespiratory arrest (CA) were risk factors for death - OR 1.04 (95% CI 1,02 - 1,07) and p<0.001; OR 3.00 (95% CI 1,01 - 8,92) and p=0.046, respectively. It was not possible to evaluate if GPDs alone were associated with an unfavorable outcome or would be a bias for the development of CA in these patients. However, of the six isolated GPDs cases, 2/3 evolved to death, showing a tendency to worse prognosis. A significant difference (p=0.031) was observed for a worse outcome when comparing the group of 28 patients who presented GPD or CA with the other group which did not present any of these variables; of these 28 patients, 20 (71.4%) died. CONCLUSIONS The presence of post-CA GPDs was associated with worse prognosis, but it was not clear whether these patterns are independent factors of an unfavorable evolution.
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Affiliation(s)
- Larissa Miyashiro
- Pontifícia Universidade Católica do Paraná, Hospital Universitário Cajuru, Curitiba, Paraná, Brazil
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17
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High-Frequency Oscillations in the Scalp EEG of Intensive Care Unit Patients With Altered Level of Consciousness. J Clin Neurophysiol 2020; 37:246-252. [PMID: 31365358 DOI: 10.1097/wnp.0000000000000624] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
PURPOSE In comatose patients, distinguishing between nonconvulsive status epilepticus and diffuse structural or metabolic encephalopathies is often challenging. Both conditions can generate periodic discharges on EEG with similar morphology and periodicity. We investigated the occurrence of high-frequency oscillations-potential biomarkers of epileptogenesis-on scalp EEG of comatose patients with periodic discharges in the EEG. METHODS Fifteen patients were included. Patients were divided into three groups, according to underlying etiology: Group 1, seizure related; group 2, structural; group 3, nonstructural. EEG recordings were compared with respect to the presence and rates of gamma (30-80 Hz) and ripples (80-250 Hz). RESULTS Patients were 23 to 106 years old (median, 68 years); 60% were female. 206 channels were eligible for analysis (median, 15 channels/patient). Overall, 43% of channels showed gamma, and 24% had ripples. Group 2 showed the highest proportion of channels with gamma (47%), followed by group 1 (38%) and group 3 (36%). Mean gamma rates were higher in group 2 (4.65 gamma/min/channel) than in group 1 (1.52) and group 3 (1.44) (P < 0.001). Group 2 showed the highest proportion of channels with ripples (29.2%), followed by group 1 (15%) and group 3 (24.2%). Mean ripple rates were higher in group 2 (5.09 ripple/min/channel) than in group 1 (0.96) and group 3 (0.83) (P < 0.001). CONCLUSIONS Fast oscillations, including high-frequency oscillations, can be detected in scalp EEG of patients with altered consciousness. High rates of fast activity may suggest an underlying structural brain lesion. Future studies are needed to determine whether fast oscillations in the setting of acute/subacute brain lesions are a biomarker of subsequent development of human epilepsy.
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19
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De Stefano P, Carboni M, Pugin D, Seeck M, Vulliémoz S. Brain networks involved in generalized periodic discharges (GPD) in post-anoxic-ischemic encephalopathy. Resuscitation 2020; 155:143-151. [PMID: 32795598 DOI: 10.1016/j.resuscitation.2020.07.030] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 07/16/2020] [Accepted: 07/28/2020] [Indexed: 10/23/2022]
Abstract
AIM Generalized periodic discharge (GPD) is an EEG pattern of poor neurological outcome, frequently observed in comatose patients after cardiac arrest. The aim of our study was to identify the neuronal network generating ≤2.5 Hz GPD using EEG source localization and connectivity analysis. METHODS We analyzed 40 comatose adult patients with anoxic-ischemic encephalopathy, who had 19 channel-EEG recording. We computed electric source analysis based on distributed inverse solution (LAURA) and we estimated cortical activity in 82 atlas-based cortical brain regions. We applied directed connectivity analysis (Partial Directed Coherence) on these sources to estimate the main drivers. RESULTS Source analysis suggested that the GPD are generated in the cortex of the limbic system in the majority of patients (87.5%). Connectivity analysis revealed main drivers located in thalamus and hippocampus for the large majority of patients (80%), together with important activation also in amygdala (70%). CONCLUSIONS We hypothesize that the anoxic-ischemic dysfunction, leading to hyperactivity of the thalamo-cortical (limbic presumably) circuit, can result in an oscillatory thalamic activity capable of inducing periodic cortical (limbic, mostly medial-temporal and orbitofrontal) discharges, similarly to the case of generalized rhythmic spike-wave discharge in convulsive or non-convulsive status epilepticus.
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Affiliation(s)
- Pia De Stefano
- EEG & Epilepsy Unit, Neurology Clinic, Department of Clinical Neurosciences, Geneva University Hospitals, 4, Rue Gabrielle Perret-Gentil, 1205 Geneva, Switzerland.
| | - Margherita Carboni
- EEG & Epilepsy Unit, Neurology Clinic, Department of Clinical Neurosciences, Geneva University Hospitals, 4, Rue Gabrielle Perret-Gentil, 1205 Geneva, Switzerland; Functional Brain Mapping Lab, Department of Fundamental Neurosciences, University of Geneva, 9, Chemin des Mines, 1202 Geneva, Switzerland
| | - Deborah Pugin
- Neuro-Intensive Care Unit, Intensive Care Department, University Hospital and Faculty of Medicine of Geneva, 4, Rue Gabrielle Perret-Gentil, 1205 Geneva, Switzerland
| | - Margitta Seeck
- EEG & Epilepsy Unit, Neurology Clinic, Department of Clinical Neurosciences, Geneva University Hospitals, 4, Rue Gabrielle Perret-Gentil, 1205 Geneva, Switzerland
| | - Serge Vulliémoz
- EEG & Epilepsy Unit, Neurology Clinic, Department of Clinical Neurosciences, Geneva University Hospitals, 4, Rue Gabrielle Perret-Gentil, 1205 Geneva, Switzerland
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20
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Keijzer HM, Klop M, van Putten MJ, Hofmeijer J. Delirium after cardiac arrest: Phenotype, prediction, and outcome. Resuscitation 2020; 151:43-49. [DOI: 10.1016/j.resuscitation.2020.03.020] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 02/26/2020] [Accepted: 03/28/2020] [Indexed: 12/14/2022]
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21
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Keijzer HM, Hoedemaekers CWE. Timing is everything: Combining EEG and MRI to predict neurological recovery after cardiac arrest. Resuscitation 2020; 149:240-242. [PMID: 32084570 DOI: 10.1016/j.resuscitation.2020.02.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Accepted: 02/12/2020] [Indexed: 10/25/2022]
Affiliation(s)
- H M Keijzer
- Department of Neurology, Rijnstate Hospital, Arnhem and Department of Intensive Care Medicine and Neurology, Donders Institute for Brain, Cognition, and Behaviour, Radboud University Medical Centre, Nijmegen, P.O. Box 9555, 6800 TA Arnhem, The Netherlands.
| | - C W E Hoedemaekers
- Department of Intensive Care Medicine, Radboud University Medical Centre, Nijmegen, P.O. Box 9101, 6500HB Nijmegen, The Netherlands.
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22
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Glimmerveen AB, Ruijter BJ, Keijzer HM, Tjepkema-Cloostermans MC, van Putten MJ, Hofmeijer J. Association between somatosensory evoked potentials and EEG in comatose patients after cardiac arrest. Clin Neurophysiol 2019; 130:2026-2031. [DOI: 10.1016/j.clinph.2019.08.022] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 06/21/2019] [Accepted: 08/18/2019] [Indexed: 12/30/2022]
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23
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Early glioma is associated with abnormal electrical events in cortical cultures. Med Biol Eng Comput 2019; 57:1645-1656. [PMID: 31079355 DOI: 10.1007/s11517-019-01980-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Accepted: 04/04/2019] [Indexed: 10/26/2022]
Abstract
The prodromal stages of some neurological diseases have a distinct electrical profile which can potentially be leveraged for early diagnosis, predicting disease recurrence, monitoring of disease progression, and better understanding of the disease pathology. Gliomas are tumors that originate from glial cells present in the brain and spinal cord. Healthy glial cells support normal neuronal function and play an important role in modulating the regular electrical activity of neurons. However, gliomas can disrupt the normal electrical dynamics of the brain. Though experimental and clinical studies suggest that glioma and injury to glial cells disrupt electrical dynamics of the brain, whether these disruptions are present during the earliest stages of glioma and glial injury are unclear. The primary aim of this study is to investigate the effect of early in vitro glial pathology (glioma and glial injury in specific) on neuronal electrical activity. In particular, we investigated the effect of glial pathology on neural synchronization: an important phenomenon that underlies several central neurophysiological processes (ScienceDirect, 2018 ). We used two in vitro disease samples: (a) a sample in which cortical cultures were treated with anti-mitotic agents that deplete glial cells and (b) a glioma sample in which healthy cortical cells were cultured with CRL-2303 (an aggressive glioma cell line). Healthy cortical culture samples were used as controls. Cultures were established over a glass dish embedded with microelectrodes that permits simultaneous measurement of extracellular electrical activity from multiple sites of the culture. We observed that healthy cortical cultures produce spontaneous and synchronized oscillations which were attenuated in the absence of glial cells. The presence of glioma was associated with the emergence of two types of "abnormal electrical activity" each with distinct amplitude and frequency profile. Our results indicate that even early stages of glioma and glial injury are associated with distinct changes in neuronal electrical activity. Graphical abstract.
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Tamune H, Hamamoto Y, Aso N, Yamamoto N. Cefepime-induced encephalopathy: Neural mass modeling of triphasic wave-like generalized periodic discharges with a high negative component (Tri-HNC). Psychiatry Clin Neurosci 2019; 73:34-42. [PMID: 30375126 PMCID: PMC7379539 DOI: 10.1111/pcn.12795] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 10/17/2018] [Accepted: 10/24/2018] [Indexed: 01/08/2023]
Abstract
AIM Cefepime, a fourth-generation cephalosporin, acts as a GABAA receptor antagonist. Cefepime-induced encephalopathy (CIE) is frequently overlooked. We aimed to clarify the clinical features, characteristic electroencephalography (EEG), and mechanisms of CIE to aid in its early recognition. METHODS CIE cases documented by a single-center consultation-liaison team between April 2015 and March 2017 were retrospectively reviewed. For further investigation, neural mass modeling was performed in silico. RESULTS Three patients with CIE refused medication/examination and showed overt pain, palilalia, and much greater deterioration of eye and verbal response than the motor response, which was possibly related to GABAergic dysfunction. Triphasic wave-like generalized periodic discharges with a high negative component (Tri-HNC) were identified on the EEG of all three cases. The simulation reproduced the characteristic feature of 2-3 Hz Tri-HNC and recovery course on EEG, and a possible involvement of individual differences in pharmacological intervention. It also suggested that auto-inhibition (synaptic inputs from interneuron to interneuron) dysregulation contributed to generating Tri-HNC in CIE. CONCLUSION As CIE is iatrogenic and continues unless cefepime is stopped, early recognition is crucial. Physicians should be vigilant about altered mental status, pain, and verbal changes in patients taking cefepime. Tri-HNC on EEG can expedite the diagnosis of CIE, and the association between Tri-HNC and CIE suggests that an excitatory and inhibitory imbalance due to the dysfunction of GABAergic interneurons is the underlying mechanism. This modeling may offer a new method of investigating disorders related to GABAergic dysfunction.
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Affiliation(s)
- Hidetaka Tamune
- Department of Neuropsychiatry, Tokyo Metropolitan Tama Medical Center, Tokyo, Japan.,Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.,Department of Cellular Neurobiology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Yu Hamamoto
- Department of Neuropsychiatry, Tokyo Metropolitan Tama Medical Center, Tokyo, Japan.,Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Naofumi Aso
- Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, Tokyo, Japan.,School of Science, Tokyo Institute of Technology, Tokyo, Japan
| | - Naoki Yamamoto
- Department of Neuropsychiatry, Tokyo Metropolitan Tama Medical Center, Tokyo, Japan
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Keijzer HM, Hoedemaekers CWE, Meijer FJA, Tonino BAR, Klijn CJM, Hofmeijer J. Brain imaging in comatose survivors of cardiac arrest: Pathophysiological correlates and prognostic properties. Resuscitation 2018; 133:124-136. [PMID: 30244045 DOI: 10.1016/j.resuscitation.2018.09.012] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Revised: 09/12/2018] [Accepted: 09/14/2018] [Indexed: 12/12/2022]
Abstract
INTRODUCTION Hypoxic-ischemic brain injury is the main cause of death and disability of comatose patients after cardiac arrest. Early and reliable prognostication is challenging. Common prognostic tools include clinical neurological examination and electrophysiological measures. Brain imaging is well established for diagnosis of focal cerebral ischemia but has so far not found worldwide application in this patient group. OBJECTIVE To review the value of Computed Tomography (CT), Magnetic Resonance Imaging (MRI), and Positron Emission Tomography (PET) for early prediction of neurological outcome of comatose survivors of cardiac arrest. METHODS A literature search was performed to identify publications on CT, MRI or PET in comatose patients after cardiac arrest. RESULTS We included evidence from 51 articles, 21 on CT, 27 on MRI, 1 on CT and MRI, and 2 on PET imaging. Studies varied regarding timing of measurements, choice of determinants, and cut-off values predicting poor outcome. Most studies were small (n = 6-398) and retrospective (60%). In general, cytotoxic oedema, defined by a grey-white matter ratio <1.10, derived from CT, or MRI-diffusion weighted imaging <650 × 10-6 mm2/s in >10% of the brain could differentiate between patients with favourable and unfavourable outcomes on a group level within 1-3 days after cardiac arrest. Advanced imaging techniques such as functional MRI or diffusion tensor imaging show promising results, but need further evaluation. CONCLUSION CT derived grey-white matter ratio and MRI based measures of diffusivity and connectivity hold promise to improve outcome prediction after cardiac arrest. Prospective validation studies in a multivariable approach are needed to determine the additional value for the individual patient.
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Affiliation(s)
- H M Keijzer
- Department of Neurology, Rijnstate Hospital, Arnhem, the Netherlands; Department of Intensive Care Medicine, Radboud University Medical Centre, Nijmegen, the Netherlands; Department of Neurology, Donders Institute for Brain, Cognition, and Behaviour, Radboud University Medical Centre, Nijmegen, the Netherlands.
| | - C W E Hoedemaekers
- Department of Intensive Care Medicine, Radboud University Medical Centre, Nijmegen, the Netherlands
| | - F J A Meijer
- Department of Radiology and Nuclear medicine, Radboud University Medical Centre, Nijmegen, the Netherlands
| | - B A R Tonino
- Department of Radiology, Rijnstate Hospital Arnhem, the Netherlands
| | - C J M Klijn
- Department of Neurology, Donders Institute for Brain, Cognition, and Behaviour, Radboud University Medical Centre, Nijmegen, the Netherlands
| | - J Hofmeijer
- Department of Neurology, Rijnstate Hospital, Arnhem, the Netherlands; Department of Clinical Neurophysiology, University of Twente, Enschede, the Netherlands
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Westhall E, Rosén I, Rundgren M, Bro-Jeppesen J, Kjaergaard J, Hassager C, Lindehammar H, Horn J, Ullén S, Nielsen N, Friberg H, Cronberg T. Time to epileptiform activity and EEG background recovery are independent predictors after cardiac arrest. Clin Neurophysiol 2018; 129:1660-1668. [DOI: 10.1016/j.clinph.2018.05.016] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Revised: 05/24/2018] [Accepted: 05/31/2018] [Indexed: 01/30/2023]
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28
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Liu R, Liao X, Li X, Wei H, Liang Q, Zhang Z, Yin M, Zeng X, Liang Z, Hu C. Expression profiles of long noncoding RNAs and mRNAs in post-cardiac arrest rat brains. Mol Med Rep 2018; 17:6413-6424. [PMID: 29512756 PMCID: PMC5928618 DOI: 10.3892/mmr.2018.8703] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Accepted: 03/01/2018] [Indexed: 01/17/2023] Open
Abstract
To investigate long noncoding (lnc)-RNA and mRNA expression profiles in post-cardiac arrest (CA) brains, an external transthoracic electrical current was applied for 8 min to induce CA (the CA group). A total of 4 rats received sham-operations and served as the blank control (BC) group. Upon return of spontaneous circulation (ROSC), lncRNA and mRNA expression in the rat cerebral cortex was assayed with high-throughput Agilent lncRNA and mRNA microarrays. In total, 37 lncRNAs were upregulated and 21 lncRNAs were downregulated in the CA group, and 258 mRNA transcripts were differentially expressed with 177 mRNAs upregulated and 81 mRNAs downregulated in the CA group. The differentially expressed lncRNAs in the CA group were co-expressed with thousands of mRNAs. The differentially expressed lncRNAs could be clustered into >100 signaling pathways and processes according to Gene Ontology, and Kyoto Encyclopedia of Genes and Genomes analyses. The most common predicted functions involved metabolic pathways, protein synthesis, transport and degradation during CA-ROSC. CA-ROSC led to significant alterations in cerebral lncRNA and mRNA expression profiles. Thus, lncRNA-mRNA network interactions have the potential to regulate vital metabolic pathways and processes involved in CA-ROSC.
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Affiliation(s)
- Rong Liu
- Department of Emergency, The First Affiliated Hospital, Guangzhou Medical University, Guangzhou, Guangdong 510120, P.R. China
| | - Xiaoxing Liao
- Department of Emergency, The First Affiliated Hospital, Sun Yat‑sen University, Guangzhou, Guangdong 510080, P.R. China
| | - Xin Li
- Department of Emergency, Guangdong Provincial People's Hospital, Guangzhou, Guangdong 510080, P.R. China
| | - Hongyan Wei
- Department of Emergency, The First Affiliated Hospital, Sun Yat‑sen University, Guangzhou, Guangdong 510080, P.R. China
| | - Qing Liang
- Department of Emergency, The First Affiliated Hospital, Guangzhou Medical University, Guangzhou, Guangdong 510120, P.R. China
| | - Zuopeng Zhang
- Department of Emergency, The First Affiliated Hospital, Guangzhou Medical University, Guangzhou, Guangdong 510120, P.R. China
| | - Meixian Yin
- Department of Emergency, The First Affiliated Hospital, Sun Yat‑sen University, Guangzhou, Guangdong 510080, P.R. China
| | - Xiaoyun Zeng
- Department of Emergency, The First Affiliated Hospital, Sun Yat‑sen University, Guangzhou, Guangdong 510080, P.R. China
| | - Zijing Liang
- Department of Emergency, The First Affiliated Hospital, Guangzhou Medical University, Guangzhou, Guangdong 510120, P.R. China
| | - Chunlin Hu
- Department of Emergency, The First Affiliated Hospital, Sun Yat‑sen University, Guangzhou, Guangdong 510080, P.R. China
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Ruijter B, Hofmeijer J, Meijer H, van Putten M. Synaptic damage underlies EEG abnormalities in postanoxic encephalopathy: A computational study. Clin Neurophysiol 2017; 128:1682-1695. [PMID: 28753456 DOI: 10.1016/j.clinph.2017.06.245] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Revised: 05/02/2017] [Accepted: 06/15/2017] [Indexed: 01/01/2023]
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30
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le Feber J, Erkamp N, van Putten MJAM, Hofmeijer J. Loss and recovery of functional connectivity in cultured cortical networks exposed to hypoxia. J Neurophysiol 2017; 118:394-403. [PMID: 28424292 DOI: 10.1152/jn.00098.2017] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Revised: 04/18/2017] [Accepted: 04/18/2017] [Indexed: 01/13/2023] Open
Abstract
In the core of a brain infarct, loss of neuronal function is followed by neuronal death within minutes. In an area surrounding the core (penumbra), some perfusion remains. Here, neurons initially remain structurally intact, but massive synaptic failure strongly reduces neural activity. Activity in the penumbra may eventually recover or further deteriorate toward massive cell death. Besides activity recovery, return of brain functioning requires restoration of connectivity. However, low activity has been shown to initiate compensatory mechanisms that affect network connectivity. We investigated the effect of transient hypoxia and compensatory mechanisms on activity and functional connectivity using cultured cortical networks on multielectrode arrays. Networks were exposed to hypoxia of controlled depth (10-90% of normoxia) and duration (6-48 h). First, we determined how hypoxic depth and duration govern activity recovery. Then, we investigated connectivity changes during and after hypoxic incidents, mild enough for activity to recover. Shortly after hypoxia onset, activity and connectivity decreased. Following 4-6 h of ongoing hypoxia, we observed partial recovery. Only if the hypoxic burden was limited did connectivity show further recovery upon return to normoxia. Partial recovery during hypoxia was dominated by restored baseline connections, rather than newly formed ones. Baseline strengths of surviving (persisting or recovered) and lost connections did not differ nor did baseline activity at their "presynaptic" electrodes. However, "postsynaptic" electrodes of surviving connections were significantly more active during baseline than those of lost connections. This implies that recovery during hypoxia reflects an effective mechanism to restore network activity, which does not necessarily conserve prehypoxia connectivity.NEW & NOTEWORTHY Hypoxia reduced the firing rates of cultured neurons. Depending on hypoxic depth and duration, activity recovered during hypoxia and upon return to normoxia. Recovery (partial) during hypoxia was associated with restored baseline connections rather than newly formed ones. Predominantly, baseline connections with most active postsynaptic electrodes recovered, supporting the notion of effective activity homeostasis. This compensatory mechanism remained effective during ~20 h of hypoxia. Beyond 20 h of compensation, loss of activity and connectivity became irreversible.
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Affiliation(s)
- Joost le Feber
- Clinical Neurophysiology, MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, Enschede, the Netherlands;
| | - Niels Erkamp
- Clinical Neurophysiology, MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, Enschede, the Netherlands
| | - Michel J A M van Putten
- Clinical Neurophysiology, MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, Enschede, the Netherlands.,Department of Clinical Neurophysiology, Medisch Spectrum Twente, Enschede, the Netherlands; and
| | - Jeannette Hofmeijer
- Clinical Neurophysiology, MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, Enschede, the Netherlands.,Department of Neurology, Rijnstate Hospital, Arnhem, the Netherlands
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Renzel R, Baumann CR, Mothersill I, Poryazova R. Persistent generalized periodic discharges: A specific marker of fatal outcome in cerebral hypoxia. Clin Neurophysiol 2016; 128:147-152. [PMID: 27894023 DOI: 10.1016/j.clinph.2016.10.091] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Revised: 10/24/2016] [Accepted: 10/26/2016] [Indexed: 11/28/2022]
Abstract
OBJECTIVES Electroencephalography (EEG) is one of the methods used in predicting the outcome after cerebral hypoxia. In this study we aim to evaluate the significance of generalized periodic discharges (GPD) as a prognostic marker. METHODS We retrospectively analyzed the medical histories of patients, who underwent an EEG after cardiac arrest during the time period from 2005 to 2013 at the University Hospital Zurich. All EEGs were re-interpreted using the 2012 American Clinical Neurophysiology Society (ACNS) classification for intensive care unit (ICU) EEGs. RESULTS Out of 131 patients, in which an EEG was recorded after cardiopulmonary resuscitation, 119 were included in our study. The average interval between cardiac arrest and EEG-recording was 3.8±3.0days (range: 0-14days). Persistent GPDs (i.e. GPDs more than 24h after the event) were found in thirty-two (26.9%) of the patients initial EEGs. The appearance of persistent GPDs preceded fatal outcome in 100% of all cases (vs. 69.0% in the non-GPD-group, p<0.0001). CONCLUSION Among other encephalopathic markers in EEG persistent GPDs are a highly specific prognostic marker of fatal outcome in patients with hypoxic encephalopathy. SIGNIFICANCE Using standardized EEG interpretation, this study identified persistent GPDs as a specific prognostic marker in post cardiac arrest syndrome.
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Affiliation(s)
- Roland Renzel
- Department Neurology, University Hospital Zurich, University of Zurich, Zurich, Switzerland.
| | - Christian R Baumann
- Department Neurology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Ian Mothersill
- Department Neurology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Rositsa Poryazova
- Department Neurology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
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Nie J, Yang X. Modulation of Synaptic Plasticity by Exercise Training as a Basis for Ischemic Stroke Rehabilitation. Cell Mol Neurobiol 2016; 37:5-16. [PMID: 26910247 DOI: 10.1007/s10571-016-0348-1] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2015] [Accepted: 02/11/2016] [Indexed: 12/23/2022]
Abstract
In recent years, rehabilitation of ischemic stroke draws more and more attention in the world, and has been linked to changes of synaptic plasticity. Exercise training improves motor function of ischemia as well as cognition which is associated with formation of learning and memory. The molecular basis of learning and memory might be synaptic plasticity. Research has therefore been conducted in an attempt to relate effects of exercise training to neuroprotection and neurogenesis adjacent to the ischemic injury brain. The present paper reviews the current literature addressing this question and discusses the possible mechanisms involved in modulation of synaptic plasticity by exercise training. This review shows the pathological process of synaptic dysfunction in ischemic roughly and then discusses the effects of exercise training on scaffold proteins and regulatory protein expression. The expression of scaffold proteins generally increased after training, but the effects on regulatory proteins were mixed. Moreover, the compositions of postsynaptic receptors were changed and the strength of synaptic transmission was enhanced after training. Finally, the recovery of cognition is critically associated with synaptic remodeling in an injured brain, and the remodeling occurs through a number of local regulations including mRNA translation, remodeling of cytoskeleton, and receptor trafficking into and out of the synapse. We do provide a comprehensive knowledge of synaptic plasticity enhancement obtained by exercise training in this review.
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Affiliation(s)
- Jingjing Nie
- Department of Neurology, Xiang Ya Hospital, Central South University, Xiang Ya Road 87, Changsha, 410008, Hunan, China
| | - Xiaosu Yang
- Department of Neurology, Xiang Ya Hospital, Central South University, Xiang Ya Road 87, Changsha, 410008, Hunan, China.
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Flores G, Flores-Gómez GD, de Jesús Gomez-Villalobos M. Neuronal changes after chronic high blood pressure in animal models and its implication for vascular dementia. Synapse 2016; 70:198-205. [DOI: 10.1002/syn.21887] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Revised: 01/08/2016] [Accepted: 01/15/2016] [Indexed: 12/11/2022]
Affiliation(s)
- Gonzalo Flores
- Instituto de Fisiología, Benemérita Universidad Autónoma de Puebla. 14 Sur 6301; Puebla 72570 México
| | - Gabriel D. Flores-Gómez
- Departamento de Ciencias de la Salud; Licenciatura en Medicina. Universidad de las Américas Puebla; Puebla Cholula México
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le Feber J, Tzafi Pavlidou S, Erkamp N, van Putten MJAM, Hofmeijer J. Progression of Neuronal Damage in an In Vitro Model of the Ischemic Penumbra. PLoS One 2016; 11:e0147231. [PMID: 26871437 PMCID: PMC4752264 DOI: 10.1371/journal.pone.0147231] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Accepted: 12/30/2015] [Indexed: 12/12/2022] Open
Abstract
Improvement of neuronal recovery in the ischemic penumbra around a brain infarct has a large potential to advance clinical recovery of patients with acute ischemic stroke. However, pathophysiological mechanisms leading to either recovery or secondary damage in the penumbra are not completely understood. We studied neuronal dynamics in a model system of the penumbra consisting of networks of cultured cortical neurons exposed to controlled levels and durations of hypoxia. Short periods of hypoxia (pO2≈20mmHg) reduced spontaneous activity, due to impeded synaptic function. After ≈6 hours, activity and connectivity partially recovered, even during continuing hypoxia. If the oxygen supply was restored within 12 hours, changes in network connectivity were completely reversible. For longer periods of hypoxia (12–30 h), activity levels initially increased, but eventually decreased and connectivity changes became partially irreversible. After ≈30 hours, all functional connections disappeared and no activity remained. Since this complete silence seemed unrelated to hypoxic depths, but always followed an extended period of low activity, we speculate that irreversible damage (at least partly) results from insufficient neuronal activation. This opens avenues for therapies to improve recovery by neuronal activation.
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Affiliation(s)
- Joost le Feber
- Clinical Neurophysiology, MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, Enschede, The Netherlands
- * E-mail:
| | - Stelina Tzafi Pavlidou
- Clinical Neurophysiology, MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, Enschede, The Netherlands
| | - Niels Erkamp
- Clinical Neurophysiology, MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, Enschede, The Netherlands
| | - Michel J. A. M. van Putten
- Clinical Neurophysiology, MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, Enschede, The Netherlands
- Department of Clinical Neurophysiology, Medisch Spectrum Twente, Enschede, The Netherlands
| | - Jeannette Hofmeijer
- Clinical Neurophysiology, MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, Enschede, The Netherlands
- Department of Neurology, Rijnstate Hospital, Arnhem, The Netherlands
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Hofmeijer J, van Putten MJAM. EEG in postanoxic coma: Prognostic and diagnostic value. Clin Neurophysiol 2016; 127:2047-55. [PMID: 26971488 DOI: 10.1016/j.clinph.2016.02.002] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Revised: 01/26/2016] [Accepted: 02/01/2016] [Indexed: 01/08/2023]
Abstract
Evolution of the EEG background pattern is a robust contributor to prediction of poor or good outcome of comatose patients after cardiac arrest. At 24h, persistent isoelectricity, low voltage activity, or burst-suppression with identical bursts predicts a poor outcome without false positives. Rapid recovery toward continuous patterns within 12h is strongly associated with a good neurological outcome. Predictive values are highest in the first 24h, despite the use of mild therapeutic hypothermia and sedative medication. Studies on reactivity or mismatch negativity have not included the EEG background pattern. Therefore, the additional predictive value of reactivity parameters remains unclear. Whether or not treatment of electrographic status epilepticus improves outcome is studied in the randomized multicenter Treatment of Electroencephalographic STatus epilepticus After cardiopulmonary Resuscitation (TELSTAR) trial (NCT02056236).
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Affiliation(s)
- J Hofmeijer
- Clinical Neurophysiology, MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, Enschede, The Netherlands; Department of Neurology, Rijnstate Hospital, Arnhem, The Netherlands.
| | - M J A M van Putten
- Clinical Neurophysiology, MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, Enschede, The Netherlands; Department of Clinical Neurophysiology, Medisch Spectrum Twente, Enschede, The Netherlands.
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Ruijter BJ, van Putten MJAM, Hofmeijer J. Generalized epileptiform discharges in postanoxic encephalopathy: Quantitative characterization in relation to outcome. Epilepsia 2015; 56:1845-54. [PMID: 26384469 DOI: 10.1111/epi.13202] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/24/2015] [Indexed: 01/04/2023]
Abstract
OBJECTIVE Electrographic status epilepticus is observed in 10-35% of patients with postanoxic encephalopathy. It remains unclear which electrographic seizure patterns indicate possible recovery, and which are a mere reflection of severe ischemic encephalopathy, where treatment would be futile. We aimed to identify quantitative electroencephalography (EEG) features with prognostic significance. METHODS From continuous EEG recordings of 47 patients with generalized electrographic status epilepticus after cardiac arrest, 5-min epochs were selected every hour. Epochs were visually assessed and categorized into seven categories, including epileptiform discharges. Five quantitative measures were extracted, reflecting background continuity, discharge frequency, discharge periodicity, relative discharge power, and interdischarge waveform correlation. The best achieved outcome within 6 months after cardiac arrest was categorized as "good" (Cerebral Performance Category 1-2, i.e., no or moderate neurologic disability) or "poor" (CPC 3-5, i.e., severe disability, coma, or death). RESULTS Ten patients (22%) had a good outcome. Status epilepticus in patients with good outcome started later (45 vs. 29 h after cardiac arrest, p < 0.001), more often ceased for at least 12 h (90% vs. 16%, p = 0.02), and was less often treated with antiepileptic drugs (30% vs. 73%, p = 0.02). Status epilepticus in patients with a good outcome always evolved from a continuous background pattern, as opposed to evolution from a discontinuous background pattern in 14 patients (38%) with a poor outcome. Epileptiform patterns of patients with good outcome had higher background continuity (1.00 vs. 0.83, p < 0.001), higher discharge frequency (1.63 vs. 0.90 Hz, p = 0.002), lower relative discharge power (0.29 vs. 0.40, p = 0.01), and lower discharge periodicity (0.32 vs. 0.45, p = 0.04). SIGNIFICANCE Our results can be used to identify patients with possible recovery. We speculate that quantitative features associated with poor outcome reflect low neural network complexity, resulting from extensive ischemic damage.
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Affiliation(s)
- Barry J Ruijter
- Clinical Neurophysiology, MIRA-Institute for Biomedical Technology and Technical Medicine, University of Twente, Enschede, The Netherlands
| | - Michel J A M van Putten
- Clinical Neurophysiology, MIRA-Institute for Biomedical Technology and Technical Medicine, University of Twente, Enschede, The Netherlands.,Departments of Neurology and Clinical Neurophysiology, Medisch Spectrum Twente, Enschede, The Netherlands
| | - Jeannette Hofmeijer
- Clinical Neurophysiology, MIRA-Institute for Biomedical Technology and Technical Medicine, University of Twente, Enschede, The Netherlands.,Department of Neurology, Rijnstate Hospital, Arnhem, The Netherlands
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PKA Inhibitor H89 (N-[2-p-bromocinnamylamino-ethyl]-5-isoquinolinesulfonamide) Attenuates Synaptic Dysfunction and Neuronal Cell Death following Ischemic Injury. Neural Plast 2015; 2015:374520. [PMID: 26448879 PMCID: PMC4584069 DOI: 10.1155/2015/374520] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Revised: 02/27/2015] [Accepted: 03/17/2015] [Indexed: 11/26/2022] Open
Abstract
The cyclic AMP-dependent protein kinase (PKA), which activates prosurvival signaling proteins, has been implicated in the expression of long-term potentiation and hippocampal long-term memory. It has come to light that H89 commonly known as the PKA inhibitor have diverse roles in the nervous system that are unrelated to its role as a PKA inhibitor. We have investigated the role of H89 in ischemic and reperfusion injury. First, we examined the expression of postsynaptic density protein 95 (PSD95), microtubule-associated protein 2 (MAP2), and synaptophysin in mouse brain after middle cerebral artery occlusion injury. Next, we examined the role of H89 pretreatment on the expression of brain-derived neurotrophic factor (BDNF), PSD95, MAP2, and the apoptosis regulators Bcl2 and cleaved caspase-3 in cultured neuroblastoma cells exposed to hypoxia and reperfusion injury. In addition, we investigated the alteration of AKT activation in H89 pretreated neuroblastoma cells under hypoxia and reperfusion injury. The data suggest that H89 may contribute to brain recovery after ischemic stroke by regulating neuronal death and proteins related to synaptic plasticity.
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van Putten MJAM, Hofmeijer J. Generalized periodic discharges: Pathophysiology and clinical considerations. Epilepsy Behav 2015; 49:228-33. [PMID: 25944113 DOI: 10.1016/j.yebeh.2015.04.007] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2015] [Accepted: 04/03/2015] [Indexed: 01/12/2023]
Abstract
Generalized periodic discharges (GPDs) are commonly encountered in metabolic encephalopathy and cerebral hypoxia/ischemia. The clinical significance of this EEG pattern is indistinct, and it is unclear whether treatment with antiepileptic drugs is beneficial. In this study, we discuss potential pathophysiological mechanisms. Based on the literature, supplemented with simulations in a minimal computational model, we conclude that selective synaptic failure or neuronal damage of inhibitory interneurons, leading to disinhibition of excitatory pyramidal cells, presumably plays a critical role. Reversibility probably depends on the potential for functional recovery of these interneurons. Whether antiepileptic drugs are helpful for regaining function is unclear. This article is part of a Special Issue entitled "Status Epilepticus".
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Affiliation(s)
- Michel J A M van Putten
- Department of Clinical Neurophysiology, MIRA, Institute for Biomedical Technology and Technical Medicine, University of Twente, Enschede, The Netherlands; Dept of Neurology and Clinical Neurophysiology, Medisch Spectrum Twente, Enschede, The Netherlands.
| | - Jeannette Hofmeijer
- Department of Clinical Neurophysiology, MIRA, Institute for Biomedical Technology and Technical Medicine, University of Twente, Enschede, The Netherlands; Department of Neurology, Rijnstate Ziekenhuis, Arnhem, The Netherlands.
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Ruijter BJ, van Putten MJAM, Horn J, Blans MJ, Beishuizen A, van Rootselaar AF, Hofmeijer J. Treatment of electroencephalographic status epilepticus after cardiopulmonary resuscitation (TELSTAR): study protocol for a randomized controlled trial. Trials 2014; 15:433. [PMID: 25377067 PMCID: PMC4237766 DOI: 10.1186/1745-6215-15-433] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2014] [Accepted: 10/21/2014] [Indexed: 11/16/2022] Open
Abstract
Background Electroencephalographic (EEG) status epilepticus is described in 10 to 35% of patients with postanoxic encephalopathy after successful cardiopulmonary resuscitation and is associated with case fatality rates of 90 to 100%. It is unclear whether these EEG patterns represent a condition to be treated with anticonvulsants to improve outcome, or an expression of severe ischemic damage, in which treatment is futile. Methods/Design TELSTAR is a multicenter clinical trial with two parallel groups, randomized treatment allocation, open label treatment, and blinded endpoint evaluation (PROBE design). We aim to enroll 172 adult patients with postanoxic encephalopathy and electroencephalographic status epilepticus after successful cardiopulmonary resuscitation, admitted to the ICU, in whom continuous EEG monitoring is started within 24 hours after admission. Patients are randomly assigned to either medical treatment to suppress all electrographic seizure activity, or no treatment of electroencephalographic status epilepticus. Antiepileptic treatment is based on guidelines for treatment of overt status epilepticus and is started within 3 hours after the diagnosis. If status epilepticus returns during tapering of sedative medication after suppression of all epileptiform activity for 2 × 24 hours, it will be considered refractory. The primary outcome measure is neurological outcome defined as the Cerebral Performance Category (CPC) score at 3 months, dichotomized into ‘good’ (CPC 1 to 2 = no or moderate neurological disability) and ‘poor’ (CPC 3 to 5 = severe disability, coma, or death). Secondary outcome measures include mortality and, for patients surviving up to 12 months, cognitive functioning, health related quality of life, and depression. Trial registration Clinicaltrials.gov; NCT02056236. Date of registration: 4 February 2014.
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Affiliation(s)
- Barry J Ruijter
- Clinical Neurophysiology group, MIRA - Institute for Biomedical Technology and Technical Medicine, University of Twente, Hallenweg 15, 7522NB Enschede, The Netherlands.
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A neural mass model based on single cell dynamics to model pathophysiology. J Comput Neurosci 2014; 37:549-68. [DOI: 10.1007/s10827-014-0517-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2014] [Revised: 06/24/2014] [Accepted: 07/21/2014] [Indexed: 01/30/2023]
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Hofmeijer J, Tjepkema-Cloostermans MC, Blans MJ, Beishuizen A, van Putten MJAM. Unstandardized treatment of electroencephalographic status epilepticus does not improve outcome of comatose patients after cardiac arrest. Front Neurol 2014; 5:39. [PMID: 24744748 PMCID: PMC3978332 DOI: 10.3389/fneur.2014.00039] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2014] [Accepted: 03/17/2014] [Indexed: 11/25/2022] Open
Abstract
Objective: Electroencephalographic status epilepticus occurs in 9–35% of comatose patients after cardiac arrest. Mortality is 90–100%. It is unclear whether (some) seizure patterns represent a condition in which anti-epileptic treatment may improve outcome, or severe ischemic damage, in which treatment is futile. We explored current treatment practice and its effect on patients’ outcome. Methods: We retrospectively identified patients that were treated with anti-epileptic drugs from our prospective cohort study on the value of continuous electroencephalography (EEG) in comatose patients after cardiac arrest. Outcome at 6 months was dichotomized between “good” [cerebral performance category (CPC) 1 or 2] and “poor” (CPC 3, 4, or 5). EEG analyses were done at 24 h after cardiac arrest and during anti-epileptic treatment. Unequivocal seizures and generalized periodic discharges during more than 30 min were classified as status epilepticus. Results: Thirty-one (22%) out of 139 patients were treated with anti-epileptic drugs (phenytoin, levetiracetam, valproate, clonazepam, propofol, midazolam), of whom 24 had status epilepticus. Dosages were moderate, barbiturates were not used, medication induced burst-suppression not achieved, and treatment improved electroencephalographic status epilepticus patterns temporarily (<6 h). Twenty-three patients treated for status epilepticus (96%) died. In patients with status epilepticus at 24 h, there was no difference in outcome between those treated with and without anti-epileptic drugs. Conclusion: In comatose patients after cardiac arrest complicated by electroencephalographic status epilepticus, current practice includes unstandardized, moderate treatment with anti-epileptic drugs. Although widely used, this does probably not improve patients’ outcome. A randomized controlled trial to estimate the effect of standardized, aggressive treatment, directed at complete suppression of epileptiform activity during at least 24 h, is needed and in preparation.
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Affiliation(s)
- Jeannette Hofmeijer
- Clinical Neurophysiology, MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente , Enschede , Netherlands ; Department of Neurology, Rijnstate Hospital , Arnhem , Netherlands
| | - Marleen C Tjepkema-Cloostermans
- Clinical Neurophysiology, MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente , Enschede , Netherlands ; Department of Clinical Neurophysiology, Medisch Spectrum Twente , Enschede , Netherlands
| | - Michiel J Blans
- Department of Intensive Care, Rijnstate Hospital , Arnhem , Netherlands
| | - Albertus Beishuizen
- Department of Intensive Care, Medisch Spectrum Twente , Enschede , Netherlands
| | - Michel J A M van Putten
- Clinical Neurophysiology, MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente , Enschede , Netherlands ; Department of Clinical Neurophysiology, Medisch Spectrum Twente , Enschede , Netherlands
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van Putten MJAM, Zandt BJ. Neural mass modeling for predicting seizures. Clin Neurophysiol 2013; 125:867-8. [PMID: 24326320 DOI: 10.1016/j.clinph.2013.11.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2013] [Revised: 11/18/2013] [Accepted: 11/19/2013] [Indexed: 12/01/2022]
Affiliation(s)
- Michel J A M van Putten
- Department of Neurology and Clinical Neurophysiology, Medisch Spectrum Twente and Clinical Neurophysiology group, MIRA-Institute for Biomedical Technology and Technical Medicine, University of Twente, Enschede, The Netherlands.
| | - Bas-Jan Zandt
- Neuroimaging group, MIRA-Institute for Biomedical Technology and Technical Medicine, University of Twente, Enschede, The Netherlands.
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