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Bilginer HA, Sogut O, Az A, Ergenc H. Electrocardiographic abnormalities are prognostic of the clinical outcomes and mortality of patients with subarachnoid hemorrhages. Am J Emerg Med 2024; 81:140-145. [PMID: 38728937 DOI: 10.1016/j.ajem.2024.04.055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2023] [Revised: 04/05/2024] [Accepted: 04/30/2024] [Indexed: 05/12/2024] Open
Abstract
PURPOSE We explored the relationships between electrocardiographic (ECG) abnormalities and the clinical outcomes and mortality of patients with non-traumatic aneurysmal subarachnoid hemorrhages (SAHs). METHODS This retrospective cohort study enrolled consecutive adult patients who presented to emergency departments with non-traumatic aneurysmal SAHs. We recorded their demographics, clinical characteristics, and ECG findings, and explored the relationships between ECG abnormalities, on the one hand, and 28-day mortality and prognosis, on the other. RESULTS We enrolled 158 patients, 76 females (48.10%) and 82 males (51.90%) of average age 54.70 ± 7.07 years. A total of 107 patients (67.72%) exhibited at least one ECG abnormality, most commonly a T-wave change (n = 54, 34.18%). Such patients evidenced significantly higher Hunt-Hess and Fisher scale scores than those without abnormalities (both p < 0.001). Patients with abnormal ECG findings experienced more unfavorable outcomes and higher mortality than others (both p < 0.001). ECG abnormalities, including PR prolongation, pathological Q waves, QRS widening, left bundle branch blocks, premature ventricular contractions, ST segment changes, and T-wave changes, were more common in non-survivors and patients with Hunt-Hess scores of 4-5 compared to survivors and those with Hunt-Hess scores <4, respectively. Moreover, increased age and presence of abnormal ECG findings were independent predictors of mortality in aneurysmal SAHs. CONCLUSIONS Patients with abnormal ECG findings exhibited unfavorable clinical outcomes and increased mortality rates. Abnormal ECG findings combined with higher Hunt-Hess or Fischer grade scores usefully predict adverse clinical outcomes in and mortality of SAH patients.
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Affiliation(s)
- Halil Ahmet Bilginer
- University of Health Sciences, Haseki Training and Research Hospital, Department of Emergency Medicine, Istanbul, Turkey
| | - Ozgur Sogut
- University of Health Sciences, Haseki Training and Research Hospital, Department of Emergency Medicine, Istanbul, Turkey.
| | - Adem Az
- Istanbul Beylikduzu State Hospital, Department of Emergency Medicine, Istanbul, Turkey.
| | - Huseyin Ergenc
- University of Health Sciences, Haseki Training and Research Hospital, Department of Emergency Medicine, Istanbul, Turkey
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Longhitano Y, Bottinelli M, Pappalardo F, Maj G, Audo A, Srejic U, Rasulo FA, Zanza C. Electrocardiogram alterations in non-traumatic brain injury: a systematic review. J Clin Monit Comput 2024; 38:407-414. [PMID: 37736801 DOI: 10.1007/s10877-023-01075-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Accepted: 08/30/2023] [Indexed: 09/23/2023]
Abstract
The presence of abnormal electrocardiograms in individuals without known organic heart disease is one of the most common manifestations of cardiac dysfunction occurring during acute non traumatic brain injury. The primary goal of the present review is to provide an overview of the available data and literature regarding the presence of new-onset electrocardiographic (ECG) alterations in acute non traumatic brain injury. The secondary aim is to identify the incidence of ECG alterations and consider the prognostic significance of new-onset ECG changes in this setting. To do so, English language articles from January 2000 to January 2022 were included from PubMed using the following keywords: "electrocardiogram and subarachnoid hemorrhage", "electrocardiogram and intracranial hemorrhage", "Q-T interval and subarachnoid hemorrhage ", "Q-T interval and intracranial bleeding ", "Q-T interval and intracranial hemorrhage", and "brain and heart- interaction in stroke". Of 3162 papers, 27 original trials looking at electrocardiogram alterations in acute brain injury were included following the PRISMA guideline. ECG abnormalities associated with acute brain injury could potentially predict poor patient outcomes. They could even herald the future development of neurogenic pulmonary edema (NPE), delayed cerebral ischemia (DCI), and even in-hospital death. In particular, patients with SAH are at increased risk of having severe ventricular dysrhythmias. These may contribute to a high mortality rate and to poor functional outcome at 3 months. The current data on ECG QT dispersion and mortality appear less clearly associated. While some patients demonstrated poor outcomes, others showed no relationship with poor outcomes or increased in-hospital mortality. Observing ECG alterations carefully after cerebral damage is important in the critical care of these patients as it can expose preexisting myocardial disease and change prognosis.
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Affiliation(s)
- Yaroslava Longhitano
- Department of Anesthesiology and Perioperative Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - Maria Bottinelli
- Department of Anesthesiology and Intensive Care, "Maggiore Della Carità" University Hospital, Corso Mazzini18, 28100, Novara, Italy
| | - Federico Pappalardo
- Department of Cardiac Anesthesiology, AON SS. Antonio E Biagio E Cesare Arrigo H, Alessandria, Italy
| | - Giulia Maj
- Department of Cardiac Anesthesiology, AON SS. Antonio E Biagio E Cesare Arrigo H, Alessandria, Italy
| | - Andrea Audo
- Department of Cardiac Surgery, AON SS. Antonio E Biagio E Cesare Arrigo H, Alessandria, Italy
| | - Una Srejic
- Department of Anesthesiology, Pain Medicine, and Critical Care, University of California, San Diego, USA
| | - Frank Anthony Rasulo
- Department of Anesthesiology, Pain Medicine, and Critical Care, Spedali Civili, University of Brescia, Brescia, Italy
| | - Christian Zanza
- Italian Society of Pre-Hospital Emergency Medicine (SIS-118), Consultant in Anesthesia and Critical Care and Consultant in Internal and Emergency Medicine, Taranto, EU, Italy.
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Wang HP, Chen CC, Lee CC, Chen CT, Chang TW, Yeap MC, Liu YT, Hsieh PC, Wu MH, Liu ZH, Wang YC. Using a continuous electrocardiographic patch with heart rhythm analysis in the subacute stage of aneurysmal subarachnoid hemorrhage: The feasibility verification. Clin Neurol Neurosurg 2023; 228:107687. [PMID: 36963286 DOI: 10.1016/j.clineuro.2023.107687] [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: 12/05/2022] [Revised: 02/22/2023] [Accepted: 03/21/2023] [Indexed: 03/26/2023]
Abstract
OBJECTIVE Continuous cardiac monitoring on patients with aneurysmal subarachnoid hemorrhage (aSAH) is difficult out of intensive care unit (ICU) in the subacute stage. Therefore, we verified the feasibility of a novel electrocardiography (ECG) patch device to record long-term heart rhythm. METHODS The ECG patches were applied on aSAH patients during their stay in general ward. Any types of significant arrythmia were identified, and heart rate variability (HRV) measures were calculated in time and frequency domains. We analyzed the correlation between heart rhythm with Hunt and Hess scale and modified Fisher scale as well as the occurrence of secondary complications. RESULTS Twenty-six patients used the devices on median day 6 after aSAH onset, with put on and take down time average as 137 s and 45 s, respectively. Mean record time was 221.7 h, and no adverse event presented within the period. Hunt and Hess II/III subgroup had higher percentage of HRV high frequency band than IV/V subgroup (9.1 % vs 3.5 %, p = 0.043), whereas ultra low frequency band presented more in the later subgroup (50.4 % vs 61.4 %, p = 0.035). The very low frequency percentage significantly decreased (p = 0.025) at an average of 3 days prior to the occurrence of secondary complications compared to the days without complications. CONCLUSION For aSAH patients in general ward during subacute stage, the ECG patch is a safe and feasible tool. The correlation of long-term heart rhythm with prognosis is worthy to be investigated on larger sample size using this device in the future.
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Affiliation(s)
- Hsun-Peng Wang
- Department of Surgery, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan
| | - Ching-Chang Chen
- Department of Neurosurgery, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan; School of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Cheng-Chi Lee
- Department of Neurosurgery, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan; School of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Chung-Ting Chen
- Department of Neurosurgery, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan; School of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Ting-Wei Chang
- Department of Neurosurgery, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan; School of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Mun-Chun Yeap
- Department of Neurosurgery, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan; School of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Yu-Tse Liu
- Department of Neurosurgery, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan; School of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Po-Chuan Hsieh
- Department of Neurosurgery, New Taipei Municipal Tu Cheng Hospital, Chang Gung Medical Foundation, Taipei, Taiwan; School of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Min-Hsien Wu
- Graduate Institute of Biomedical Engineering, Chang Gung University, Taoyuan, Taiwan
| | - Zhuo-Hao Liu
- Department of Neurosurgery, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan; School of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Yu-Chi Wang
- Department of Neurosurgery, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan; School of Medicine, Chang Gung University, Taoyuan, Taiwan.
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Al-Mufti F, Mayer SA, Kaur G, Bassily D, Li B, Holstein ML, Ani J, Matluck NE, Kamal H, Nuoman R, Bowers CA, S Ali F, Al-Shammari H, El-Ghanem M, Gandhi C, Amuluru K. Neurocritical care management of poor-grade subarachnoid hemorrhage: Unjustified nihilism to reasonable optimism. Neuroradiol J 2021; 34:542-551. [PMID: 34476991 PMCID: PMC8649190 DOI: 10.1177/19714009211024633] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
BACKGROUND AND PURPOSE Historically, overall outcomes for patients with high-grade subarachnoid hemorrhage (SAH) have been poor. Generally, between physicians, either reluctance to treat, or selectivity in treating such patients has been the paradigm. Recent studies have shown that early and aggressive care leads to significant improvement in survival rates and favorable outcomes of grade V SAH patients. With advancements in both neurocritical care and end-of-life care, non-treatment or selective treatment of grade V SAH patients is rarely justified. Current paradigm shifts towards early and aggressive care in such cases may lead to improved outcomes for many more patients. MATERIALS AND METHODS We performed a detailed review of the current literature regarding neurointensive management strategies in high-grade SAH, discussing multiple aspects. We discussed the neurointensive care management protocols for grade V SAH patients. RESULTS Acutely, intracranial pressure control is of utmost importance with external ventricular drain placement, sedation, optimization of cerebral perfusion pressure, osmotherapy and hyperventilation, as well as cardiopulmonary support through management of hypotension and hypertension. CONCLUSIONS Advancements of care in SAH patients make it unethical to deny treatment to poor Hunt and Hess grade patients. Early and aggressive treatment results in a significant improvement in survival rate and favorable outcome in such patients.
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Affiliation(s)
- Fawaz Al-Mufti
- Department of Neurology, Westchester Medical Center, Westchester Medical Center, Valhalla, USA
- Department of Neurosurgery, Westchester Medical Center, Westchester Medical Center, Valhalla, USA
| | - Stephan A Mayer
- Department of Neurosurgery, Westchester Medical Center, Westchester Medical Center, Valhalla, USA
| | - Gurmeen Kaur
- Department of Neurology, Westchester Medical Center, Westchester Medical Center, Valhalla, USA
- Department of Neurosurgery, Westchester Medical Center, Westchester Medical Center, Valhalla, USA
| | - Daniel Bassily
- School of Medicine, New York Medical College, New York Medical College, Valhalla, USA
| | - Boyi Li
- School of Medicine, New York Medical College, New York Medical College, Valhalla, USA
| | - Matthew L Holstein
- School of Medicine, New York Medical College, New York Medical College, Valhalla, USA
| | - Jood Ani
- School of Medicine, New York Medical College, New York Medical College, Valhalla, USA
| | - Nicole E Matluck
- School of Medicine, New York Medical College, New York Medical College, Valhalla, USA
| | - Haris Kamal
- Department of Neurosurgery, Westchester Medical Center, Westchester Medical Center, Valhalla, USA
| | - Rolla Nuoman
- Department of Neurology, Westchester Medical Center, Maria Fareri Children’s Hospital, Westchester Medical Center, Valhalla, USA
| | | | - Faizan S Ali
- Department of Neurology, Westchester Medical Center, Westchester Medical Center, Valhalla, USA
| | - Hussein Al-Shammari
- Department of Neurology, Westchester Medical Center, Westchester Medical Center, Valhalla, USA
| | - Mohammad El-Ghanem
- Department of Neurology, Neurosurgery and Medical Imaging, University of Arizona, Tucson, USA
| | - Chirag Gandhi
- Department of Neurosurgery, Westchester Medical Center, Westchester Medical Center, Valhalla, USA
| | - Krishna Amuluru
- Goodman Campbell Brain and Spine, Ascension St. Vincent Medical Center, Indianapolis, USA
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Schupper AJ, Eagles ME, Neifert SN, Mocco J, Macdonald RL. Lessons from the CONSCIOUS-1 Study. J Clin Med 2020; 9:jcm9092970. [PMID: 32937959 PMCID: PMC7564635 DOI: 10.3390/jcm9092970] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 09/02/2020] [Accepted: 09/09/2020] [Indexed: 12/25/2022] Open
Abstract
After years of research on treatment of aneurysmal subarachnoid hemorrhage (aSAH), including randomized clinical trials, few treatments have been shown to be efficacious. Nevertheless, reductions in morbidity and mortality have occurred over the last decades. Reasons for the improved outcomes remain unclear. One randomized clinical trial that has been examined in detail with these questions in mind is Clazosentan to Overcome Neurological Ischemia and Infarction Occurring After Subarachnoid Hemorrhage (CONSCIOUS-1). This was a phase-2 trial testing the effect of clazosentan on angiographic vasospasm (aVSP) in patients with aSAH. Clazosentan decreased moderate to severe aVSP. There was no statistically significant effect on the extended Glasgow outcome score (GOS), although the study was not powered for this endpoint. Data from the approximately 400 patients in the study were detailed, rigorously collected and documented and were generously made available to one investigator. Post-hoc analyses were conducted which have expanded our knowledge of the management of aSAH. We review those analyses here.
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Affiliation(s)
- Alexander J. Schupper
- Department of Neurosurgery, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; (A.J.S.); (S.N.N.); (J.M)
| | - Matthew E. Eagles
- Department of Clinical Neurosciences, Division of Neurosurgery, Alberta Children’s Hospital, University of Calgary, Alberta, AB T3B 6A8, Canada;
| | - Sean N. Neifert
- Department of Neurosurgery, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; (A.J.S.); (S.N.N.); (J.M)
| | - J Mocco
- Department of Neurosurgery, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; (A.J.S.); (S.N.N.); (J.M)
| | - R. Loch Macdonald
- Department of Neurological Surgery, UCSF Fresno, Fresno, CA 93701, USA
- Correspondence: ; Tel.: +1 (559) 459-3705
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Braga GP, Gonçalves RS, Minicucci MF, Bazan R, Zornoff LAM. Strain pattern and T-wave alterations are predictors of mortality and poor neurologic outcome following stroke. Clin Cardiol 2020; 43:568-573. [PMID: 32087617 PMCID: PMC7298998 DOI: 10.1002/clc.23348] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Revised: 02/11/2020] [Accepted: 02/14/2020] [Indexed: 12/31/2022] Open
Abstract
Background Stroke is associated with electrocardiogram (ECG) abnormalities. However, the role of strain pattern as predictor of poor neurologic outcome and mortality after stroke has not yet been demonstrated. Hypothesis ECG abnormalities, with a particular focus on ST‐segment changes, are predictors of mortality and neurologic disability 90 days after stroke. Methods Patients with up to 24 hours of stroke were prospectively recruited. An ECG was taken at the time of admission. The patients' clinical evolution was evaluated during hospitalization and after discharge by means of a prescheduled return in 90 days. The degree of disability was measured by the modified Rankin scale (mRs). In relation to the mRs, patients were divided into those with scores from 0 to 2 and those with scores equal to or greater than 3 at the end of the observation period. Results Of the 112 patients studied, 29 (25.8%) died during the study period. Patients who died presented higher National Institute of Health Stroke Scale and mRs scores on admission, elevated biomarkers of myocardial necrosis, and abnormalities on the ECG. The prevalence of ECG abnormalities was 63%. A logistic regression model showed that strain pattern and T‐wave alterations were predictors of mortality (odds ratio [OR]: 12.970, 95% confidence interval [CI]: 1.519‐110.723, P = .019; OR: 3.873, 95% CI: 1.135‐13.215, P = .031, respectively) and mRs at 90 days (OR: 12.557, 95% CI: 1.671‐94.374, P = .014; OR: 15.970, 95% CI: 3.671‐69.479, P < .001, respectively) after stroke, adjusted by sex, age, stroke subtype, entrance NIH, previous mRs score, and stroke thrombolysis. Conclusion Strain pattern and T‐wave alterations were predictors of mortality and poor neurologic outcome 90 days after stroke.
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Affiliation(s)
- Gabriel P Braga
- Botucatu Medical School, Neurology Department, São Paulo State University (Unesp), Botucatu, Brazil
| | - Renato S Gonçalves
- Botucatu Medical School, Internal Medicine Department, São Paulo State University (Unesp), Botucatu, Brazil
| | - Marcos F Minicucci
- Botucatu Medical School, Internal Medicine Department, São Paulo State University (Unesp), Botucatu, Brazil
| | - Rodrigo Bazan
- Botucatu Medical School, Neurology Department, São Paulo State University (Unesp), Botucatu, Brazil
| | - Leonardo A M Zornoff
- Botucatu Medical School, Internal Medicine Department, São Paulo State University (Unesp), Botucatu, Brazil
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Beta-Blockade in Aneurysmal Subarachnoid Hemorrhage: a Systematic Review and Meta-Analysis. Neurocrit Care 2020; 33:508-515. [PMID: 31993953 DOI: 10.1007/s12028-020-00915-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
BACKGROUND/OBJECTIVE Sympathetic nervous system activation after aneurysmal subarachnoid hemorrhage (aSAH) is associated with complications and poor outcome. In this systematic review and meta-analysis, we investigate the effect of beta-blockers on outcome after aSAH. METHODS The review was prospectively registered with PROSPERO (CRD42019111784). We performed a systematic literature search of MEDLINE, EMBASE, the Cochrane Library, published conference proceedings, and abstracts. Eligible studies included both randomized controlled trials and observational studies up to October 2018, reporting the effect of beta-blocker therapy on the following outcomes in aSAH: mortality, vasospasm, delayed cerebral ischemia, infarction or stroke, cardiac dysfunction, and functional outcomes. Studies involving traumatic SAH were excluded. Citations were reviewed, and data extracted independently by two investigators using a standardized proforma. RESULTS We identified 819 records with 16 studies (four were randomized controlled trials) including 6702 patients selected for analysis. Exposure to beta-blockade either before or after aSAH was associated with a significant reduction in unadjusted mortality (RR 0.63, 95% CI 0.42-0.93, p = 0.02). A significant reduction in unadjusted mortality was also seen in prospective trials of post-event beta-blockade (RR 0.51, 95% CI 0.28-0.93, p = 0.03). Statistically significant differences were not seen for other outcomes investigated. CONCLUSIONS In adult patients with aSAH, beta-blocker therapy is associated with a mortality benefit. Studies are generally of a low quality with considerable clinical heterogeneity. Prospective large interventional trials with patient centered outcomes are required to validate this finding.
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Ibrahim MS, Samuel B, Mohamed W, Suchdev K. Cardiac Dysfunction in Neurocritical Care: An Autonomic Perspective. Neurocrit Care 2020; 30:508-521. [PMID: 30484009 DOI: 10.1007/s12028-018-0636-3] [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] [Indexed: 12/14/2022]
Abstract
A number of neurologic disorders can cause cardiac dysfunction by involving the conductive system and contractile apparatus of the heart. This is especially prominent in the neurocritical care setting where the spectrum of cardiac dysfunction due to acute neurologic injury ranges from trivial and isolated electrocardiographic changes to malignant arrhythmias and sudden death (Table 1). The mechanism of these cardiac complications is complex and not fully understood. An understanding of the neuroanatomical structures and pathways is of immense importance to comprehend the underlying pathophysiology that culminates as cardiac damage and dysregulation. Once the process is initiated, it can complicate and adversely affect the outcome of primary neurologic conditions commonly seen in the neurocritical care setting. Not only are these cardiac disorders under-recognized, there is a paucity of data to formulate evidence-based guidelines regarding early detection, acute management, and preventive strategies. However, certain details of clinical features and their course combined with location of primary neurologic lesion on neuroimaging and data obtained from laboratory investigations can be of great value to develop a strategy to appropriately manage these patients and to prevent adverse outcome from these cardiac complications. In this review, we highlight the mechanisms of cardiac dysfunction due to catastrophic neurologic conditions or due to stress of critical illness. We also address various clinical syndromes of cardiac dysfunction that occur as a result of the neurologic illness and in turn may complicate the course of the primary neurologic condition.
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Affiliation(s)
- Mohammad S Ibrahim
- Department of Neurology, Division of Neurocritical care, Wayne State University School of Medicine, Detroit, MI, USA
| | - Bennson Samuel
- Department of Neurology, Division of Neurocritical care, Wayne State University School of Medicine, Detroit, MI, USA
| | - Wazim Mohamed
- Department of Neurology, Division of Neurocritical care, Wayne State University School of Medicine, Detroit, MI, USA
| | - Kushak Suchdev
- Department of Neurology, Division of Neurocritical care, Wayne State University School of Medicine, Detroit, MI, USA.
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Gandhoke C, Syal S, Gupta R, Singh D, Sharma J, Mahajan B, Tandon M, Trehan V, Bansal A. Study of the Clinical, Electrocardiographic and Biochemical Spectrum of Cardiovascular Complications in Patients With Aneurysmal Subarachnoid Hemorrhage − An Initial Experience at a Tertiary Centre in India. MAMC JOURNAL OF MEDICAL SCIENCES 2020. [DOI: 10.4103/mamcjms.mamcjms_77_19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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10
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Matano F, Fujiki Y, Mizunari T, Koketsu K, Tamaki T, Murai Y, Yokota H, Morita A. Serum Glucose and Potassium Ratio as Risk Factors for Cerebral Vasospasm after Aneurysmal Subarachnoid Hemorrhage. J Stroke Cerebrovasc Dis 2019; 28:1951-1957. [PMID: 31060790 DOI: 10.1016/j.jstrokecerebrovasdis.2019.03.041] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Revised: 01/14/2019] [Accepted: 03/16/2019] [Indexed: 02/07/2023] Open
Abstract
OBJECTIVE Cerebral vasospasm is associated with poor prognosis in patients with aneurysmal subarachnoid hemorrhage (SAH), and biomarkers for predicting poor prognosis have not yet been established. We attempted to clarify the relationship between serum glucose/potassium ratio and cerebral vasospasm in patients with aneurysmal SAH. METHODS We studied 333 of 535 aneurysmal SAH patients treated between 2006 and 2016 (123 males, 210 females; mean age 59.7 years; range 24-93). We retrospectively analyzed the relationship between cerebral vasospasm grade and clinical risk factors, including serum glucose/potassium ratio. RESULTS Postoperative angiography revealed cerebral vasospasm in 112 patients (33.6%). Significant correlations existed between the ischemic complication due to cerebral vasospasm and glucose/potassium ratio (P < .0001), glucose (P = .016), and potassium (P = .0017). Serum glucose/potassium ratio was elevated in the cerebral vasospasm grade dependent manner (Spearman's r = 0.1207, P = .0279). According to the Glasgow Outcome Scale (GOS) score at discharge, 185 patients (55.5%) had a poor outcome (GOS scores 1-3). Serum glucose/potassium ratio was significantly correlated between poor outcome (GOS scores 1-3) and age (P < .0001), serum glucose/potassium ratio (P < .0001), glucose (P < .0001), potassium (P = .0004), white blood cell count (P = .0012), and cerebral infarction due to cerebral vasospasm (P < .0001). Multivariate logistic regression analyzes showed significant correlations between cerebral infarction due to cerebral vasospasm and serum glucose/potassium ratio (P = .018), glucose (P = .027), and potassium (P = .052). CONCLUSIONS Serum glucose/potassium ratio in cases of aneurysmal SAH was significantly associated with cerebral infarction due to cerebral vasospasm and GOS at discharge. Therefore, this factor was useful to predict prognosis in patients with cerebral vasospasm and aneurysmal SAH.
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Affiliation(s)
- Fumihiro Matano
- Department of Neurosurgery, Tama Nagayama Hospital, Tokyo, Japan.
| | - Yu Fujiki
- Department of Emergency and Critical Care Medicine, Nippon Medical School, Tokyo, Japan
| | - Takayuki Mizunari
- Department of Neurological Surgery, Nippon Medical School, Tokyo, Japan
| | - Kenta Koketsu
- Department of Neurological Surgery, Nippon Medical School, Tokyo, Japan
| | - Tomonori Tamaki
- Department of Neurosurgery, Tama Nagayama Hospital, Tokyo, Japan
| | - Yasuo Murai
- Department of Neurological Surgery, Nippon Medical School, Tokyo, Japan
| | - Hiroyuki Yokota
- Department of Emergency and Critical Care Medicine, Nippon Medical School, Tokyo, Japan
| | - Akio Morita
- Department of Neurological Surgery, Nippon Medical School, Tokyo, Japan
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11
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Castro RRTD. Electrocardiographic changes in patients with acute brain injury. Rev Assoc Med Bras (1992) 2019; 65:596-597. [DOI: 10.1590/1806-9282.65.5.596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Accepted: 05/27/2018] [Indexed: 11/22/2022] Open
Affiliation(s)
- Renata R. T. de Castro
- Naval Hospital Marcílio Dias, Brasil; University of Nova Iguaçu, Brasil; Brigham and Women's Hospital, USA
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12
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Berry C, Sidik N, Pereira AC, Ford TJ, Touyz RM, Kaski J, Hainsworth AH. Small-Vessel Disease in the Heart and Brain: Current Knowledge, Unmet Therapeutic Need, and Future Directions. J Am Heart Assoc 2019; 8:e011104. [PMID: 30712442 PMCID: PMC6405580 DOI: 10.1161/jaha.118.011104] [Citation(s) in RCA: 65] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Colin Berry
- British Heart Foundation Glasgow Cardiovascular Research CentreInstitute of Cardiovascular and Medical SciencesUniversity of GlasgowUnited Kingdom
- The Queen Elizabeth Hospital Discipline of MedicineUniversity of AdelaideCentral Adelaide Local Health NetworkCoronary Vasomotion Disorders International Study Group (COVADIS)AdelaideAustralia
| | - Novalia Sidik
- British Heart Foundation Glasgow Cardiovascular Research CentreInstitute of Cardiovascular and Medical SciencesUniversity of GlasgowUnited Kingdom
- The Queen Elizabeth Hospital Discipline of MedicineUniversity of AdelaideCentral Adelaide Local Health NetworkCoronary Vasomotion Disorders International Study Group (COVADIS)AdelaideAustralia
| | - Anthony C. Pereira
- Department of NeurologySt George's University Hospitals NHS Foundation TrustLondonUnited Kingdom
| | - Thomas J. Ford
- British Heart Foundation Glasgow Cardiovascular Research CentreInstitute of Cardiovascular and Medical SciencesUniversity of GlasgowUnited Kingdom
- The Queen Elizabeth Hospital Discipline of MedicineUniversity of AdelaideCentral Adelaide Local Health NetworkCoronary Vasomotion Disorders International Study Group (COVADIS)AdelaideAustralia
- Faculty of MedicineUNSWUniversity of New South WalesSydneyNSWAustralia
| | - Rhian M. Touyz
- British Heart Foundation Glasgow Cardiovascular Research CentreInstitute of Cardiovascular and Medical SciencesUniversity of GlasgowUnited Kingdom
| | - Juan‐Carlos Kaski
- The Queen Elizabeth Hospital Discipline of MedicineUniversity of AdelaideCentral Adelaide Local Health NetworkCoronary Vasomotion Disorders International Study Group (COVADIS)AdelaideAustralia
- Department of CardiologySt George's University Hospitals NHS Foundation TrustLondonUnited Kingdom
| | - Atticus H. Hainsworth
- Department of NeurologySt George's University Hospitals NHS Foundation TrustLondonUnited Kingdom
- Molecular and Clinical Sciences Research InstituteSt Georges University of LondonUnited Kingdom
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Sugimoto K, Yamada A, Inamasu J, Hirose Y, Takada K, Sugimoto K, Tanaka R, Watanabe E, Ozaki Y. Electrocadiographic Scoring Helps Predict Left Ventricular Wall Motion Abnormality Commonly Observed after Subarachnoid Hemorrhage. J Stroke Cerebrovasc Dis 2018; 27:3148-3154. [PMID: 30120035 DOI: 10.1016/j.jstrokecerebrovasdis.2018.07.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Revised: 06/25/2018] [Accepted: 07/02/2018] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND Cardiac wall motion abnormality (WMA) is a common complication in patients with subarachnoid hemorrhage (SAH) and is one determinant of their prognosis. The aim of this study was to examine whether the electrocardiography (ECG) findings at admission could predict WMA commonly observed after SAH. MATERIALS AND METHODS We studied 161 SAH patients with SAH who were hospitalized in our institution between April 2007 and November 2010. We performed bedside 2-dimensional transthoracic echocardiography and 12-lead surface ECG within 24hours of SAH onset. Each of the following ECG changes was scored as having 1 point: ST elevation, ST depression and T wave inversion. We summed up the points in every patient and compared with WMA evaluated by echocardiography. RESULTS The study subjects were classified into 2 groups based on the presence of WMA. Multivariate analysis revealed that ST elevation, ST depression and T wave inversion were strong independent predictors of WMA. Receiver operating characteristic curve determined that the threshold value to predict WMA was 4 points (sensitivity 86.5%, specificity 83.1%, AUC 0.94, P < .0001). CONCLUSIONS In conclusion, a novel ECG score may well predict WMA after SAH which may associate with an increased risk of mortality.
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Affiliation(s)
- Keiko Sugimoto
- Department of Medical Technology, Fujita Health University, Toyoake, Japan
| | - Akira Yamada
- Department of Cardiology, Fujita Health University, Toyoake, Japan.
| | - Joji Inamasu
- Department of Neurosurgery, Fujita Health University, Toyoake, Japan
| | - Yuichi Hirose
- Department of Neurosurgery, Fujita Health University, Toyoake, Japan
| | - Kayoko Takada
- Department of Cardiology, Fujita Health University, Toyoake, Japan
| | - Kunihiko Sugimoto
- Clinical Laboratory, Fujita Health University Hospital, Toyoake, Japan
| | - Risako Tanaka
- Clinical Laboratory, Fujita Health University Hospital, Toyoake, Japan
| | - Eiichi Watanabe
- Department of Cardiology, Fujita Health University, Toyoake, Japan
| | - Yukio Ozaki
- Department of Cardiology, Fujita Health University, Toyoake, Japan
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14
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[Acute diseases of the brain and heart : A reciprocal culprit-victim relationship]. Med Klin Intensivmed Notfmed 2018; 113:456-463. [PMID: 30105559 DOI: 10.1007/s00063-018-0465-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Accepted: 06/20/2018] [Indexed: 01/27/2023]
Abstract
The reciprocal culprit-victim relationship between the brain and the heart leads to dysfunction and damage to the other organ, especially in acute and severe diseases of one of both organs. In addition, both organ systems can be affected by identical systemic processes, e. g., arteriosclerotic changes. Cardiac embolic formation and pumping failure lead to focal cerebral ischemia or global hypoxia. Cerebral diseases leading to cardiac changes are acute cerebrovascular attacks such as cerebral infarction, intracerebral hemorrhage and subarachnoid hemorrhage, as well as epileptic seizures. The pathophysiological mechanisms of changes of the brain-heart axis include cerebrally induced autonomic dysregulation, neuroendocrine regulatory disorders, and systemic inflammatory processes. The effects on the heart are evident in up to 75% of patients with acute brain diseases leading to ECG changes, arrhythmias, increase in cardiac enzymes and myocardial damage even to sudden cardiac death. For this reason, cardiac monitoring should be provided in severe acute brain diseases.
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Al-Mufti F, Amuluru K, Smith B, Damodara N, El-Ghanem M, Singh IP, Dangayach N, Gandhi CD. Emerging Markers of Early Brain Injury and Delayed Cerebral Ischemia in Aneurysmal Subarachnoid Hemorrhage. World Neurosurg 2017; 107:148-159. [PMID: 28755916 DOI: 10.1016/j.wneu.2017.07.114] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Accepted: 07/18/2017] [Indexed: 02/07/2023]
Abstract
BACKGROUND Delayed cerebral ischemia after aneurysmal subarachnoid hemorrhage is characterized by a highly complex pathophysiology and results in neurologic deterioration after the inciting bleed. Despite its significant consequences, prompt diagnosis can be elusive and treatment is often administered too late. Early brain injury, which occurs within the first 72 hours after ictus, may be an important factor for delayed cerebral ischemia and poor overall outcome. Here, we explore the purported clinical and pathologic manifestations of early brain injury to identify biomarkers that could have prognostic value. METHODS We review the literature and discuss potential emerging markers of delayed cerebral ischemia in the context of early brain injury. RESULTS The following clinical features and biomarkers were examined: global cerebral edema, ictal loss of consciousness, ultra early angiographic vasospasm, continuous electroencephalogram monitoring, systemic inflammatory response syndrome, cellular mediators of the inflammatory response, and hematologic derangements. CONCLUSIONS Some of these markers possess independent value for determining the risk of complications after aneurysmal subarachnoid hemorrhage. However, their use is limited because of a variety of factors, but they do provide an avenue of further study to aid in diagnosis and management.
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Affiliation(s)
- Fawaz Al-Mufti
- Division of Neuroendovascular Surgery and Neurocritical Care, Department of Neurology, Rutgers University - Robert Wood Johnson Medical School, New Brunswick, New Jersey, USA; Department of Neurosurgery, Rutgers University - New Jersey Medical School, Newark, New Jersey, USA.
| | - Krishna Amuluru
- Department of Neurointerventional Radiology, University of Pittsburgh, Hamot, Erie, Pennsylvania, USA
| | - Brendan Smith
- Department of Neurosurgery, Rutgers University - New Jersey Medical School, Newark, New Jersey, USA
| | - Nitesh Damodara
- Department of Neurosurgery, Rutgers University - New Jersey Medical School, Newark, New Jersey, USA
| | - Mohammad El-Ghanem
- Department of Neurosurgery, Rutgers University - New Jersey Medical School, Newark, New Jersey, USA
| | - Inder P Singh
- Department of Neurosurgery, Rutgers University - New Jersey Medical School, Newark, New Jersey, USA; Department of Neurology, Rutgers University - New Jersey Medical School, Newark, New Jersey, USA
| | - Neha Dangayach
- Department of Neurology and Neurosurgery, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Chirag D Gandhi
- Department of Neurosurgery, Rutgers University - New Jersey Medical School, Newark, New Jersey, USA; Department of Neurology, Rutgers University - New Jersey Medical School, Newark, New Jersey, USA; Department of Neurosurgery, Westchester Medical Center - New York Medical College, Valhalla, New York, USA
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16
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Tahsili-Fahadan P, Geocadin RG. Heart-Brain Axis: Effects of Neurologic Injury on Cardiovascular Function. Circ Res 2017; 120:559-572. [PMID: 28154104 DOI: 10.1161/circresaha.116.308446] [Citation(s) in RCA: 135] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/06/2016] [Revised: 01/06/2017] [Accepted: 01/06/2017] [Indexed: 01/23/2023]
Abstract
A complex interaction exists between the nervous and cardiovascular systems. A large network of cortical and subcortical brain regions control cardiovascular function via the sympathetic and parasympathetic outflow. A dysfunction in one system may lead to changes in the function of the other. The effects of cardiovascular disease on the nervous system have been widely studied; however, our understanding of the effects of neurological disorders on the cardiovascular system has only expanded in the past 2 decades. Various pathologies of the nervous system can lead to a wide range of alterations in function and structure of the cardiovascular system ranging from transient and benign electrographic changes to myocardial injury, cardiomyopathy, and even cardiac death. In this article, we first review the anatomy and physiology of the central and autonomic nervous systems in regard to control of the cardiovascular function. The effects of neurological injury on cardiac function and structure will be summarized, and finally, we review neurological disorders commonly associated with cardiovascular manifestations.
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Affiliation(s)
- Pouya Tahsili-Fahadan
- From the Neurosciences Critical Care Division, Departments of Neurology, Anesthesiology & Critical Care Medicine, and Neurosurgery, The Johns Hopkins University School of Medicine, Baltimore, MD
| | - Romergryko G Geocadin
- From the Neurosciences Critical Care Division, Departments of Neurology, Anesthesiology & Critical Care Medicine, and Neurosurgery, The Johns Hopkins University School of Medicine, Baltimore, MD.
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Yao PS, Chen GR, Zheng SF, Kang DZ. Predictors of Postoperative Cerebral Ischemia in Patients with Ruptured Anterior Communicating Artery Aneurysms. World Neurosurg 2017; 103:241-247. [PMID: 28408258 DOI: 10.1016/j.wneu.2017.04.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Revised: 03/31/2017] [Accepted: 04/01/2017] [Indexed: 01/28/2023]
Abstract
OBJECTIVE Cerebral ischemia is a major contributor to poor outcome after ruptured anterior communicating artery aneurysms (ACoAs), and is not well classified. In this article, we develop a classification and identify risk factors of cerebral ischemia after ruptured ACoAs. METHODS Three hundred sixty patients with ruptured ACoAs undergoing microsurgical clipping were collected. Sex, age, smoking status, Hunt-Hess grade, Fisher grade, hospital stay, surgical timing, hypertension, diabetes, postoperative cerebral ischemia, and postoperative modified Rankin Scale score were collected. Postoperative ischemic changes are classified according to a novel grade (ischemic grade I-IV). RESULTS Predictive factors of postoperative ischemia (grade I-IV) included sex (odds ratio [OR], 1.956; 95% confidence interval [CI], 1.262-3.032; P = 0.003) and Fisher grade (OR, 1.813; 95% CI, 1.144-2.871; P = 0.011). Male sex had a tendency to develop postoperative cerebral ischemia (61.3% in the ischemia group vs. 45.7% in the nonischemia group), while surgical timing did not. However, in patients with postoperative ischemia, early surgery within 3 days (OR, 3.334; 95% CI, 1.411-7.879; P = 0.006) and advanced age greater than 55 years (OR, 2.783; 95% CI, 1.214-6.382; P = 0.016) were risk factors for postoperative neurologic deficits (grade III-IV). CONCLUSIONS Male sex and higher Fisher grade predict postoperative ischemia (grade I-IV), whereas surgical timing does not. However, in patients with postoperative cerebral ischemia, early surgery within 3 days and age greater than 55 years can increase the frequency of postoperative neurological deficits (grade III-IV). Older male patients undergoing early microsurgery had a tendency to develop neurologic deficits.
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Affiliation(s)
- Pei-Sen Yao
- Department of Neurosurgery, First Affiliated Hospital of Fujian Medical University, Fuzhou, China
| | - Guo-Rong Chen
- Department of Neurosurgery, First Affiliated Hospital of Fujian Medical University, Fuzhou, China
| | - Shu-Fa Zheng
- Department of Neurosurgery, First Affiliated Hospital of Fujian Medical University, Fuzhou, China.
| | - De-Zhi Kang
- Department of Neurosurgery, First Affiliated Hospital of Fujian Medical University, Fuzhou, China.
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19
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Zhang L, Qi S. Electrocardiographic Abnormalities Predict Adverse Clinical Outcomes in Patients with Subarachnoid Hemorrhage. J Stroke Cerebrovasc Dis 2016; 25:2653-2659. [PMID: 27476337 DOI: 10.1016/j.jstrokecerebrovasdis.2016.07.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Revised: 06/13/2016] [Accepted: 07/02/2016] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND We conducted a retrospective cohort study of a large sample to assess whether electrocardiographic (ECG) abnormalities are independently associated with the occurrence of neurogenic pulmonary edema (NPE), delayed cerebral ischemia (DCI), and in-hospital death after nontraumatic subarachnoid hemorrhage (SAH). METHODS In this retrospective observational study, patients who were admitted within 72 hours of SAH symptom onset between 2013 and 2015 were enrolled. Twelve-lead ECG findings obtained within 72 hours after SAH and the presence of NPE, DCI, and in-hospital death were collected based on the results reported in the medical records. RESULTS We included 834 patients. NPE occurred in 192 patients (23%). The median delay from SAH onset to NPE was 3 days (interquartile range [IQR]: 5 days). DCI occurred in 223 patients (27%; median delay to DCI, 4 days; IQR: 5 days). In total, 141 patients (17%) died in the hospital (median time to death, 12 days; IQR: 18 days). The frequency of ECG abnormalities for all enrolled patients was 65%. Corrected QT prolongation had an adjusted risk ratio (RR) of 1.5 (1.1-2.2) for NPE and 1.8 (1.3-2.4) for DCI. ST depression had an adjusted RR of 3.0 (1.2-7.5) for in-hospital death. NSSTTCs (nonspecific ST- or T-wave changes) had an adjusted RR of 2.7 (1.8-4.2) for NPE, 2.8 (1.9-4.3) for DCI, and 2.2 (1.3-3.5) for in-hospital death. All RRs were adjusted for age and Hunt-Hess scores. CONCLUSIONS ECG abnormalities assessed within 72 hours after SAH using a standard 12-lead ECG are independently associated with an increased risk of adverse clinical outcomes in patients with nontraumatic SAH.
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Affiliation(s)
- Limin Zhang
- Department of Anaesthesiology, The Fourth Affiliated Hospital, Harbin Medical University, Harbin, China
| | - Sihua Qi
- Department of Anaesthesiology, The Fourth Affiliated Hospital, Harbin Medical University, Harbin, China.
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Ruthirago D, Julayanont P, Tantrachoti P, Kim J, Nugent K. Cardiac Arrhythmias and Abnormal Electrocardiograms After Acute Stroke. Am J Med Sci 2016; 351:112-8. [PMID: 26802767 DOI: 10.1016/j.amjms.2015.10.020] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Accepted: 09/04/2015] [Indexed: 10/22/2022]
Abstract
Cardiac arrhythmias and electrocardiogram (ECG) abnormalities occur frequently but are often underrecognized after strokes. Acute ischemic and hemorrhagic strokes in some particular area of brain can disrupt central autonomic control of the heart, precipitating cardiac arrhythmias, ECG abnormalities, myocardial injury and sometimes sudden death. Identification of high-risk patients after acute stroke is important to arrange appropriate cardiac monitoring and effective management of arrhythmias, and to prevent cardiac morbidity and mortality. More studies are needed to better clarify pathogenesis, localization of areas associated with arrhythmias and practical management of arrhythmias and abnormal ECGs after acute stroke.
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Affiliation(s)
- Doungporn Ruthirago
- Department of Neurology, Texas Tech University Health Sciences Center, Lubbock, Texas.
| | - Parunyou Julayanont
- Department of Neurology, Texas Tech University Health Sciences Center, Lubbock, Texas
| | - Pakpoom Tantrachoti
- Department of Internal Medicine, Texas Tech University Health Sciences Center, Lubbock, Texas
| | - Jongyeol Kim
- Department of Neurology, Texas Tech University Health Sciences Center, Lubbock, Texas
| | - Kenneth Nugent
- Department of Internal Medicine, Texas Tech University Health Sciences Center, Lubbock, Texas
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21
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Elsharkawy H, Abd-Elsayed A, El-Hadi S, Provencio J, Tetzlaff J. Fluctuating Electrocardiographic Changes Predict Poor Outcomes After Acute Subarachnoid Hemorrhage. Ochsner J 2016; 16:225-229. [PMID: 27660569 PMCID: PMC5024802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023] Open
Abstract
BACKGROUND Electrocardiogram (ECG) abnormalities following aneurysmal subarachnoid hemorrhage (SAH) have been well documented. Evidence suggests that ECG changes and cardiac dysfunction worsen outcome. Determining which patients are at most risk is unclear but important to ascertain. METHODS We prospectively studied clinical markers, cardiac abnormalities, and clinical outcomes in 20 patients admitted within 48 hours of aneurysmal SAH. All patients had ECGs prior to surgical clipping, during the clipping surgery, and during the postoperative period. RESULTS The aneurysm was located in the anterior circulation in 17 patients (85%) and in the posterior circulation in 3 patients (15%). Abnormal ECG changes in patients with acute SAH were observed, with a total incidence rate of 65%. The incidence of T wave abnormalities was 53.8% among the patients with ECG changes, 46.2% had ST segment change, and 30.8% had QT interval prolongation. Of the 13 patients with ECG changes, 4 (30.8%) had fluctuating ECG abnormalities (an abnormality that presented and disappeared during the study period or changed in character). All 4 patients with fluctuating ECG changes had a poor outcome (100%) compared to 3 of the 9 patients (33.3%) patients with fixed abnormalities (P<0.05). CONCLUSION The unique finding in this study that has not been reported previously in the literature is the contribution of dynamic ECG changes to the prognosis for good recovery from aneurysmal SAH. In our group, all the patients who had ECG changes that fluctuated from one abnormal change to another had a poor outcome. The etiology of this finding is not clear but may open the door to further study into the pathogenesis of cardiac changes in aneurysmal SAH. The clinical utility of the variability of ECG abnormalities needs to be validated in a larger cohort of patients with longer follow-up than was possible in this study.
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Affiliation(s)
- Hesham Elsharkawy
- Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Department of General Anesthesiology and Department of Outcomes Research, Cleveland Clinic Foundation, Cleveland, OH
| | - Alaa Abd-Elsayed
- Department of Anesthesiology, University of Wisconsin School of Medicine and Public Health, Madison, WI
| | - Sherif El-Hadi
- Department of Anesthesiology, Alexandria University Hospital, Alexandria, Egypt
| | - Javier Provencio
- Department of Neurology, University of Virginia School of Medicine, Charlottesville, VA
| | - John Tetzlaff
- Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Department of General Anesthesiology, Cleveland Clinic Foundation, Cleveland, OH
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Pinnamaneni S, Dutta T, Melcer J, Aronow WS. Neurogenic stress cardiomyopathy associated with subarachnoid hemorrhage. Future Cardiol 2015; 11:77-87. [PMID: 25606704 DOI: 10.2217/fca.14.73] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Cardiac manifestations are recognized complications of subarachnoid hemorrhage. Neurogenic stress cardiomyopathy is one complication that is seen in acute subarachnoid hemorrhage. It can present as transient diffuse left ventricular dysfunction or as transient regional wall motion abnormalities. It occurs more frequently with neurologically severe-grade subarachnoid hemorrhage and is associated with increased morbidity and poor clinical outcomes. Managing this subset of patients is challenging. Early identification followed by a multidisciplinary team approach can potentially improve outcomes.
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Risk Factors for Cerebral Vasospasm Following Aneurysmal Subarachnoid Hemorrhage: A Review of the Literature. World Neurosurg 2015; 85:56-76. [PMID: 26342775 DOI: 10.1016/j.wneu.2015.08.052] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2015] [Revised: 08/17/2015] [Accepted: 08/18/2015] [Indexed: 12/13/2022]
Abstract
OBJECTIVE To examine the literature on risk factors for cerebral vasospasm (CV), one of the most serious complications following aneurysmal subarachnoid hemorrhage (SAH), with special reference to the definition of CV. METHODS Using standard search engines, including PubMed, the medical literature on risk factors for CV after SAH was reviewed, and the best definition representative of CV was searched. RESULTS Severe SAH evident on computed tomography scan was the only consistent risk factor for CV after SAH. Effects of risk factors on CV, including age, clinical grade, rebleeding, intraventricular or intracerebral hemorrhage on computed tomography scan, acute hydrocephalus, aneurysm site and size, leukocytosis, interleukin-6 level, and cardiac abnormalities, appeared to be associated with the severity of SAH rather than each having a direct effect. Cigarette smoking, hypertension, and left ventricular hypertrophy on electrocardiogram were associated with CV without any relationship to SAH severity. With regard to parameters representative of CV, the grade of angiographic vasospasm (i.e., the degree of arterial narrowing evident on angiography) was the most adequate. Nevertheless, few reports on the risk factors associated with angiographic vasospasm grade have been reported to date. CONCLUSIONS Severe SAH evident on computed tomography scan appears to be a definite risk factor for CV after SAH, followed by cigarette smoking, hypertension, and left ventricular hypertrophy on electrocardiogram. To understand the pathogenesis of CV, further studies on the relationships between risk factors, especially factors not related to the severity of SAH, and angiographic vasospasm grade are necessary.
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Ibrahim GM, Macdonald RL. The network topology of aneurysmal subarachnoid haemorrhage. J Neurol Neurosurg Psychiatry 2015; 86:895-901. [PMID: 25280913 DOI: 10.1136/jnnp-2014-308992] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Accepted: 09/05/2014] [Indexed: 11/04/2022]
Abstract
OBJECTIVE Network analysis is an emerging tool for the study of complex systems. In the current report, the cascade of physiological and neurological changes following aneurysmal subarachnoid haemorrhage (SAH) was modelled as a complex system of interacting parameters. Graph theoretical analysis was then applied to identify parameters at critical topological junctions of the network, which may represent the most effective therapeutic targets. METHODS Correlation matrices were calculated using a combination of Pearson, polyserial and polychoric regressions among 50 variables collected from 120 participants (38 male; mean age 51 years) included in the CONSCIOUS-1 trial. Graph theoretical analysis was performed to identify important topological features within the network formed by the interactions among these variables. Non-parametric resampling was applied to determine thresholds for significance. RESULTS Several critical network hubs were identified, including the incidence of delayed ischaemic neurological deficit (DIND), anaemia and hypoalbuminaemia/hypoproteinaemia. While not significant hubs, World Federation of Neurosurgical Societies (WFNS) score and use of rescue therapy had widespread connections within the network. Patient sex and history of hypertension also strongly clustered with other variables. A subnetwork (module) was also identified, which was related to neurological outcomes including WFNS score, angiographic vasospasm, DIND, use of rescue therapy and hydrocephalus. INTERPRETATION Using graph theoretical analysis, we identify critical network topologies following SAH, which may serve as useful therapeutic targets. Importantly, we demonstrate that network analysis is a robust method to model complex interactions following SAH. TRIAL REGISTRATION NUMBER URL: http://www.clinicaltrials.gov; Identifier: NCT00111085.
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Affiliation(s)
- George M Ibrahim
- Division of Neurosurgery, St. Michael's Hospital, Labatt Family Centre of Excellence in Brain Injury and Trauma Research, Keenan Research Centre of the Li Ka Shing Knowledge Institute of St. Michael's Hospital, Toronto, Ontario, Canada Department of Surgery, University of Toronto, Toronto, Ontario, Canada
| | - R Loch Macdonald
- Division of Neurosurgery, St. Michael's Hospital, Labatt Family Centre of Excellence in Brain Injury and Trauma Research, Keenan Research Centre of the Li Ka Shing Knowledge Institute of St. Michael's Hospital, Toronto, Ontario, Canada Department of Surgery, University of Toronto, Toronto, Ontario, Canada
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25
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Subarachnoid hemorrhage mimicking myocardial infarction. J Clin Neurosci 2015; 22:1981-2. [PMID: 26183304 DOI: 10.1016/j.jocn.2015.05.031] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2015] [Accepted: 05/02/2015] [Indexed: 11/21/2022]
Abstract
We discuss a patient with an aneurysmal subarachnoid hemorrhage (SAH) presenting with chest pain, electrocardiogram changes compatible with myocardial infarction, and headache. SAH is a medical emergency but an initial misdiagnosis is common, and diagnosis can be delayed due to atypical presentations. The delay of diagnosis of SAH may endanger the life of the patient. Electrocardiogram abnormalities have been described previously in aneurysmal SAH, and can obscure the correct diagnosis.
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Abstract
Aneurysmal subarachnoid hemorrhage (SAH) is a worldwide health burden with high fatality and permanent disability rates. The overall prognosis depends on the volume of the initial bleed, rebleeding, and degree of delayed cerebral ischemia (DCI). Cardiac manifestations and neurogenic pulmonary edema indicate the severity of SAH. The International Subarachnoid Aneurysm Trial (ISAT) reported a favorable neurological outcome with the endovascular coiling procedure compared with surgical clipping at the end of 1 year. The ISAT trial recruits were primarily neurologically good grade patients with smaller anterior circulation aneurysms, and therefore the results cannot be reliably extrapolated to larger aneurysms, posterior circulation aneurysms, patients presenting with complex aneurysm morphology, and poor neurological grades. The role of hypothermia is not proven to be neuroprotective according to a large randomized controlled trial, Intraoperative Hypothermia for Aneurysms Surgery Trial (IHAST II), which recruited patients with good neurological grades. Patients in this trial were subjected to slow cooling and inadequate cooling time and were rewarmed rapidly. This methodology would have reduced the beneficial effects of hypothermia. Adenosine is found to be beneficial for transient induced hypotension in 2 retrospective analyses, without increasing the risk for cardiac and neurological morbidity. The neurological benefit of pharmacological neuroprotection and neuromonitoring is not proven in patients undergoing clipping of aneurysms. DCI is an important cause of morbidity and mortality following SAH, and the pathophysiology is likely multifactorial and not yet understood. At present, oral nimodipine has an established role in the management of DCI, along with maintenance of euvolemia and induced hypertension. Following SAH, hypernatremia, although less common than hyponatremia, is a predictor of poor neurological outcome.
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Affiliation(s)
- Stanlies D'Souza
- Department of Neuroanesthesiology, Baystate Medical Center, Tufts University School of Medicine, Springfield, MA
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Fletcher JJ, Meurer W, Dunne M, Rajajee V, Jacobs TL, Sheehan KM, Nathan B, Kade AM. Inter-observer agreement on the diagnosis of neurocardiogenic injury following aneurysmal subarachnoid hemorrhage. Neurocrit Care 2014; 20:263-9. [PMID: 24366680 DOI: 10.1007/s12028-013-9941-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND Neurocardiogenic injury results from increased sympathetic nervous system activation following acute brain injury. No diagnostic criteria for neurocardiogenic injury exist, and agreement has not been tested. We investigated the agreement by neurointensivists for the presence of neurocardiogenic injury on routine cardiac studies. METHODS Six neurointensivists rated 100 consecutive cases of aneurysmal subarachnoid hemorrhage (aSAH) for the presence of neurocardiogenic injury. A fixed-panel design was employed for the agreement among the whole cohort, as well as stratified by modified Fisher Scale (mFs), Hunt and Hess grade, gender, and the presence of elevated cardiac enzymes. Overall percent agreement, paired agreement, and agreement above change (Fleiss' Kappa) were calculated. Overall percent agreement between groups was compared using Chi square tests. RESULTS Six raters completed the survey for a total 600 responses. Overall percent agreement was 79.3 %, and agreement among cases at least one rater thought had neurocardiogenic injury was 66.5 % (paired agreement). Fleiss' Kappa was 0.66 (95 % CI, 0.1-0.71; p < 0.0001), indicating substantial agreement above chance. Similarly, on subgroup analysis, significant agreement beyond chance was seen in all groups (p < 0.001). Overall percent agreement was significantly better among mFs 3-4 compared to mFs ≤ 2 (81.3 vs. 63.6 %; p = 0.018) and among cases with positive cTI (96.9 vs. 70.1 %; p ≤ 0.001). CONCLUSIONS Overall, we demonstrated substantial agreement for the presence of neurocardiogenic injury on early cardiac studies following aSAH. However, inter-observer variability increased when evaluating patients without the objective finding of elevated cTI and among those with lower clinical and radiographic grades.
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Affiliation(s)
- Jeffrey J Fletcher
- Department of Neurosurgery, University of Michigan, 1500 E. Medical Center Drive, Room 3552 TC, Ann Arbor, MI, 48109-5338, USA,
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The harmful effects of subarachnoid hemorrhage on extracerebral organs. BIOMED RESEARCH INTERNATIONAL 2014; 2014:858496. [PMID: 25110700 PMCID: PMC4109109 DOI: 10.1155/2014/858496] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/18/2014] [Revised: 05/05/2014] [Accepted: 05/06/2014] [Indexed: 01/28/2023]
Abstract
Subarachnoid hemorrhage (SAH) is a devastating neurological disorder. Patients with aneurysmal SAH develop secondary complications that are important causes of morbidity and mortality. Aside from secondary neurological injuries, SAH has been associated with nonneurologic medical complications, such as neurocardiogenic injury, neurogenic pulmonary edema, hyperglycemia, and electrolyte imbalance, of which cardiac and pulmonary complications are most common. The related mechanisms include activation of the sympathetic nervous system, release of catecholamines and other hormones, and inflammatory responses. Extracerebral complications are directly related to the severity of SAH-induced brain injury and indicate the clinical outcome in patients. This review provides an overview of the extracerebral complications after SAH. We also aim to describe the manifestations, underlying mechanisms, and the effects of those extracerebral complications on outcome following SAH.
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Chen S, Feng H, Sherchan P, Klebe D, Zhao G, Sun X, Zhang J, Tang J, Zhang JH. Controversies and evolving new mechanisms in subarachnoid hemorrhage. Prog Neurobiol 2014; 115:64-91. [PMID: 24076160 PMCID: PMC3961493 DOI: 10.1016/j.pneurobio.2013.09.002] [Citation(s) in RCA: 270] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2013] [Revised: 09/07/2013] [Accepted: 09/12/2013] [Indexed: 12/13/2022]
Abstract
Despite decades of study, subarachnoid hemorrhage (SAH) continues to be a serious and significant health problem in the United States and worldwide. The mechanisms contributing to brain injury after SAH remain unclear. Traditionally, most in vivo research has heavily emphasized the basic mechanisms of SAH over the pathophysiological or morphological changes of delayed cerebral vasospasm after SAH. Unfortunately, the results of clinical trials based on this premise have mostly been disappointing, implicating some other pathophysiological factors, independent of vasospasm, as contributors to poor clinical outcomes. Delayed cerebral vasospasm is no longer the only culprit. In this review, we summarize recent data from both experimental and clinical studies of SAH and discuss the vast array of physiological dysfunctions following SAH that ultimately lead to cell death. Based on the progress in neurobiological understanding of SAH, the terms "early brain injury" and "delayed brain injury" are used according to the temporal progression of SAH-induced brain injury. Additionally, a new concept of the vasculo-neuronal-glia triad model for SAH study is highlighted and presents the challenges and opportunities of this model for future SAH applications.
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Affiliation(s)
- Sheng Chen
- Department of Neurosurgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China; Department of Physiology & Pharmacology, Loma Linda University, Loma Linda, CA, USA
| | - Hua Feng
- Department of Neurosurgery, Southwest Hospital, Third Military Medical University, Chongqing, China
| | - Prativa Sherchan
- Department of Physiology & Pharmacology, Loma Linda University, Loma Linda, CA, USA
| | - Damon Klebe
- Department of Physiology & Pharmacology, Loma Linda University, Loma Linda, CA, USA
| | - Gang Zhao
- Department of Neurology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shanxi, China
| | - Xiaochuan Sun
- Department of Neurosurgery, First Affiliated Hospital, Chongqing Medical University, Chongqing, China
| | - Jianmin Zhang
- Department of Neurosurgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Jiping Tang
- Department of Physiology & Pharmacology, Loma Linda University, Loma Linda, CA, USA
| | - John H Zhang
- Department of Physiology & Pharmacology, Loma Linda University, Loma Linda, CA, USA; Department of Neurosurgery, Loma Linda University, Loma Linda, CA, USA.
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Moussouttas M, Lai EW, Huynh TT, James J, Stocks-Dietz C, Dombrowski K, Khoury J, Pacak K. Association between acute sympathetic response, early onset vasospasm, and delayed vasospasm following spontaneous subarachnoid hemorrhage. J Clin Neurosci 2014; 21:256-62. [DOI: 10.1016/j.jocn.2013.03.036] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2012] [Revised: 03/26/2013] [Accepted: 03/30/2013] [Indexed: 10/26/2022]
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Ibrahim GM, Morgan BR, Macdonald RL. Patient phenotypes associated with outcomes after aneurysmal subarachnoid hemorrhage: a principal component analysis. Stroke 2014; 45:670-6. [PMID: 24425125 DOI: 10.1161/strokeaha.113.003078] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
BACKGROUND AND PURPOSE Predictors of outcome after aneurysmal subarachnoid hemorrhage have been determined previously through hypothesis-driven methods that often exclude putative covariates and require a priori knowledge of potential confounders. Here, we apply a data-driven approach, principal component analysis, to identify baseline patient phenotypes that may predict neurological outcomes. METHODS Principal component analysis was performed on 120 subjects enrolled in a prospective randomized trial of clazosentan for the prevention of angiographic vasospasm. Correlation matrices were created using a combination of Pearson, polyserial, and polychoric regressions among 46 variables. Scores of significant components (with eigenvalues>1) were included in multivariate logistic regression models with incidence of severe angiographic vasospasm, delayed ischemic neurological deficit, and long-term outcome as outcomes of interest. RESULTS Sixteen significant principal components accounting for 74.6% of the variance were identified. A single component dominated by the patients' initial hemodynamic status, World Federation of Neurosurgical Societies score, neurological injury, and initial neutrophil/leukocyte counts was significantly associated with poor outcome. Two additional components were associated with angiographic vasospasm, of which one was also associated with delayed ischemic neurological deficit. The first was dominated by the aneurysm-securing procedure, subarachnoid clot clearance, and intracerebral hemorrhage, whereas the second had high contributions from markers of anemia and albumin levels. CONCLUSIONS Principal component analysis, a data-driven approach, identified patient phenotypes that are associated with worse neurological outcomes. Such data reduction methods may provide a better approximation of unique patient phenotypes and may inform clinical care as well as patient recruitment into clinical trials. CLINICAL TRIAL REGISTRATION URL http://www.clinicaltrials.gov. Unique identifier: NCT00111085.
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Affiliation(s)
- George M Ibrahim
- From the Division of Neurosurgery, St Michael's Hospital, Labatt Family Centre of Excellence in Brain Injury and Trauma Research, Keenan Research Centre of the Li Ka Shing Knowledge Institute of St Michael's Hospital, Toronto, Ontario, Canada (G.M.I., B.R.M.); Department of Surgery (G.M.I., R.L.M.) and Institute of Medical Science (G.M.I.), University of Toronto, Toronto, Ontario, Canada; and Department of Medical Imaging, Hospital for Sick Children, Toronto, Ontario, Canada (G.M.I., B.R.M.)
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Kaya E, Fischer C, Eckardt L. [ECG changes in primary neurological disorders, systemic diseases and primary cardioymopathies]. Herzschrittmacherther Elektrophysiol 2013; 24:109-114. [PMID: 23657463 DOI: 10.1007/s00399-013-0262-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2013] [Accepted: 04/02/2013] [Indexed: 06/02/2023]
Abstract
ECG diagnostic is not only an easy to use, cost efficient, extensively available method for cardiological patients, but also a potential tool in diagnostic for other morbidities. As a well-known example, cerebral hemorrhage and ischemia can show an ECG, that resembles an acute coronary syndrome. Furthermore systemic diseases may show characteristic ECG; often as a malfunction of the conductive system (e.g., AV block). Exclusion of cardiac involvement when dealing with sarcoidosis is important, and the ECG may be a first hint. Besides, in Ixodid endemic areas a cardiological manifestation of Borreliosis should be considered. ECG may also show almost specific findings in primary cardiomyopathies, such as the "pseudo-infarction Q - wave" in hypertrophic cardiomyopathy or "epsilon potentials" in arrhythmogenic right ventricular cardiomyopathy. The takotsubo cardiomyopathy commonly reveals transient ST-segment elevation and therefore depicts an important differential diagnosis of acute coronary syndromes.
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Affiliation(s)
- E Kaya
- Abteilung für Rhythmologie, Department für Kardiologie und Angiologie, Universitätsklinikum Münster, Albert Schweitzer Campus 1, Gebäude A1, 48149, Münster, Deutschland.
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Elman I, Gurvits TV, Tschibelu E, Spring JD, Lasko NB, Pitman RK. Neurological soft signs in individuals with pathological gambling. PLoS One 2013; 8:e60885. [PMID: 23593341 PMCID: PMC3617209 DOI: 10.1371/journal.pone.0060885] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2012] [Accepted: 03/04/2013] [Indexed: 01/26/2023] Open
Abstract
Increased neurological soft signs (NSSs) have been found in a number of neuropsychiatric syndromes, including chemical addiction. The present study examined NSSs related to perceptual-motor and visuospatial processing in a behavioral addiction viz., pathological gambling (PG). As compared to mentally healthy individuals, pathological gamblers displayed significantly poorer ability to copy two- and three-dimensional figures, to recognize objects against a background noise, and to orient in space on a road-map test. Results indicated that PG is associated with subtle cerebral cortical abnormalities. Further prospective clinical research is needed to address the NSSs' origin and chronology (e.g., predate or follow the development of PG) as well as their response to therapeutic interventions and/or their ability to predict such a response.
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Affiliation(s)
- Igor Elman
- Providence VA Medical Center, Harvard Medical School, Cambridge, Massachusetts, United States of America.
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TOI H, MATSUMOTO N, YOKOSUKA K, MATSUBARA S, HIRANO K, UNO M. Prediction of Cerebral Vasospasm Using Early Stage Transcranial Doppler. Neurol Med Chir (Tokyo) 2013; 53:396-402. [DOI: 10.2176/nmc.53.396] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Hiroyuki TOI
- Department of Neurosurgery, Kawasaki Medical School
| | | | | | | | | | - Masaaki UNO
- Department of Neurosurgery, Kawasaki Medical School
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