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Laurikkala J, Ameloot K, Reinikainen M, Palmers PJ, De Deyne C, Bert F, Dupont M, Janssens S, Dens J, Hästbacka J, Jakkula P, Loisa P, Birkelund T, Wilkman E, Vaara ST, Skrifvars MB. The effect of higher or lower mean arterial pressure on kidney function after cardiac arrest: a post hoc analysis of the COMACARE and NEUROPROTECT trials. Ann Intensive Care 2023; 13:113. [PMID: 37987871 PMCID: PMC10663425 DOI: 10.1186/s13613-023-01210-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2023] [Accepted: 11/06/2023] [Indexed: 11/22/2023] Open
Abstract
BACKGROUND We aimed to study the incidence of acute kidney injury (AKI) in out-of-hospital cardiac arrest (OHCA) patients treated according to low-normal or high-normal mean arterial pressure (MAP) targets. METHODS A post hoc analysis of the COMACARE (NCT02698917) and Neuroprotect (NCT02541591) trials that randomized patients to lower or higher targets for the first 36 h of intensive care. Kidney function was defined using the Kidney Disease Improving Global Outcome (KDIGO) classification. We used Cox regression analysis to identify factors associated with AKI after OHCA. RESULTS A total of 227 patients were included: 115 in the high-normal MAP group and 112 in the low-normal MAP group. Eighty-six (38%) patients developed AKI during the first five days; 40 in the high-normal MAP group and 46 in the low-normal MAP group (p = 0.51). The median creatinine and daily urine output were 85 μmol/l and 1730 mL/day in the high-normal MAP group and 87 μmol/l and 1560 mL/day in the low-normal MAP group. In a Cox regression model, independent AKI predictors were no bystander cardiopulmonary resuscitation (p < 0.01), non-shockable rhythm (p < 0.01), chronic hypertension (p = 0.03), and time to the return of spontaneous circulation (p < 0.01), whereas MAP target was not an independent predictor (p = 0.29). CONCLUSION Any AKI occurred in four out of ten OHCA patients. We found no difference in the incidence of AKI between the patients treated with lower and those treated with higher MAP after CA. Higher age, non-shockable initial rhythm, and longer time to ROSC were associated with shorter time to AKI. CLINICAL TRIAL REGISTRATION COMACARE (NCT02698917), NEUROPROTECT (NCT02541591).
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Affiliation(s)
- Johanna Laurikkala
- Department of Anaesthesiology, Intensive Care and Pain Medicine, Helsinki University Hospital and University of Helsinki, Haartmaninkatu 9, 00290 HUS, Helsinki, Finland.
| | - Koen Ameloot
- Department of Cardiology, Ziekenhuis Oost-Limburg, Genk, Belgium
- Departement de Cardiologie/Soins Intensifs Adultes, CHC-Montlégia, Liège, Belgique
- Department of Cardiology, University Hospitals Leuven, Leuven, Belgium
- Faculty of Medicine and Life Sciences, University Hasselt, Diepenbeek, Belgium
| | - Matti Reinikainen
- Department of Anaesthesiology and Intensive Care, University of Eastern Finland and Kuopio University Hospital, Kuopio, Finland
| | - Pieter-Jan Palmers
- Department of Cardiology, Ziekenhuis Oost-Limburg, Genk, Belgium
- Departement de Cardiologie/Soins Intensifs Adultes, CHC-Montlégia, Liège, Belgique
| | - Cathy De Deyne
- Faculty of Medicine and Life Sciences, University Hasselt, Diepenbeek, Belgium
- Department of Anesthesiology and Critical Care Medicine, Ziekenhuis Oost-Limburg, Genk, Belgium
| | - Ferdinande Bert
- Department of Cardiology, Ziekenhuis Oost-Limburg, Genk, Belgium
- Departement de Cardiologie/Soins Intensifs Adultes, CHC-Montlégia, Liège, Belgique
| | - Matthias Dupont
- Department of Cardiology, Ziekenhuis Oost-Limburg, Genk, Belgium
- Departement de Cardiologie/Soins Intensifs Adultes, CHC-Montlégia, Liège, Belgique
| | - Stefan Janssens
- Department of Cardiology, University Hospitals Leuven, Leuven, Belgium
| | - Joseph Dens
- Department of Cardiology, Ziekenhuis Oost-Limburg, Genk, Belgium
- Departement de Cardiologie/Soins Intensifs Adultes, CHC-Montlégia, Liège, Belgique
- Faculty of Medicine and Life Sciences, University Hasselt, Diepenbeek, Belgium
| | - Johanna Hästbacka
- Department of Anesthesia and Intensive Care, Tampere University Hospital and Tampere University, Tampere, Finland
| | - Pekka Jakkula
- Department of Anaesthesiology, Intensive Care and Pain Medicine, Helsinki University Hospital and University of Helsinki, Haartmaninkatu 9, 00290 HUS, Helsinki, Finland
| | - Pekka Loisa
- Department of Intensive Care, Päijät-Häme Central Hospital, Lahti, Finland
| | | | - Erika Wilkman
- Department of Anaesthesiology, Intensive Care and Pain Medicine, Helsinki University Hospital and University of Helsinki, Haartmaninkatu 9, 00290 HUS, Helsinki, Finland
| | - Suvi T Vaara
- Department of Anaesthesiology, Intensive Care and Pain Medicine, Helsinki University Hospital and University of Helsinki, Haartmaninkatu 9, 00290 HUS, Helsinki, Finland
| | - Markus B Skrifvars
- Department of Emergency Care and Services, Helsinki University Hospital and University of Helsinki, Helsinki, Finland
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Berg-Hansen K, Christensen KH, Gopalasingam N, Nielsen R, Eiskjær H, Møller N, Birkelund T, Christensen S, Wiggers H. Beneficial Effects of Ketone Ester in Patients With Cardiogenic Shock: A Randomized, Controlled, Double-Blind Trial. JACC Heart Fail 2023; 11:1337-1347. [PMID: 37452805 DOI: 10.1016/j.jchf.2023.05.029] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 05/16/2023] [Accepted: 05/26/2023] [Indexed: 07/18/2023]
Abstract
BACKGROUND Cardiogenic shock (CS) is a life-threatening condition with sparse treatment options. The ketone body 3-hydroxybutyrate has favorable hemodynamic effects in patients with stable chronic heart failure. Yet, the hemodynamic effects of exogenous ketone ester (KE) in patients with CS remain unknown. OBJECTIVES The authors aimed to assess the hemodynamic effects of single-dose enteral treatment with KE in patients with CS. METHODS In a double-blind, crossover study, 12 patients with CS were randomized to an enteral bolus of KE and isocaloric, isovolumic placebo containing maltodextrin. Patients were assessed with pulmonary artery catheterization, arterial blood samples, echocardiography, and near-infrared spectroscopy for 3 hours following each intervention separated by a 3-hour washout period. RESULTS KE increased circulating 3-hydroxybutyrate (2.9 ± 0.3 mmol/L vs 0.2 ± 0.3 mmol/L, P < 0.001) and was associated with augmented cardiac output (area under the curve of relative change: 61 ± 22 L vs 1 ± 18 L, P = 0.044). Also, KE increased cardiac power output (0.07 W [95% CI: 0.01-0.14]; P = 0.037), mixed venous saturation (3 percentage points [95% CI: 1-5 percentage points]; P = 0.010), and forearm perfusion (3 percentage points [95% CI: 0-6 percentage points]; P = 0.026). Right (P = 0.048) and left (P = 0.017) ventricular filling pressures were reduced whereas heart rate and mean arterial and pulmonary arterial pressures remained similar. Left ventricular ejection fraction improved by 4 percentage points (95% CI: 2-6 percentage points; P = 0.005). Glucose levels decreased by 2.6 mmol/L (95% CI: -5.2 to 0.0; P = 0.047) whereas insulin levels remained unaltered. CONCLUSIONS Treatment with KE improved cardiac output, biventricular function, tissue oxygenation, and glycemic control in patients with CS (Treatment With the Ketone Body 3-hydroxybutyrate in Patients With Cardiogenic Shock [KETO-SHOCK1]; NCT04642768).
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Affiliation(s)
- Kristoffer Berg-Hansen
- Department of Cardiology, Aarhus University Hospital, Aarhus, Denmark; Department of Clinical Medicine, Faculty of Health, Aarhus University, Aarhus, Denmark.
| | - Kristian Hylleberg Christensen
- Department of Cardiology, Aarhus University Hospital, Aarhus, Denmark; Department of Clinical Medicine, Faculty of Health, Aarhus University, Aarhus, Denmark
| | - Nigopan Gopalasingam
- Department of Cardiology, Aarhus University Hospital, Aarhus, Denmark; Department of Clinical Medicine, Faculty of Health, Aarhus University, Aarhus, Denmark
| | - Roni Nielsen
- Department of Cardiology, Aarhus University Hospital, Aarhus, Denmark
| | - Hans Eiskjær
- Department of Cardiology, Aarhus University Hospital, Aarhus, Denmark; Department of Clinical Medicine, Faculty of Health, Aarhus University, Aarhus, Denmark
| | - Niels Møller
- Department of Clinical Medicine, Faculty of Health, Aarhus University, Aarhus, Denmark; Department of Endocrinology and Metabolism, Aarhus University Hospital, Aarhus, Denmark
| | - Thomas Birkelund
- Department of Anesthesiology and Intensive Care, Aarhus University Hospital, Aarhus, Denmark
| | - Steffen Christensen
- Department of Clinical Medicine, Faculty of Health, Aarhus University, Aarhus, Denmark; Department of Anesthesiology and Intensive Care, Aarhus University Hospital, Aarhus, Denmark
| | - Henrik Wiggers
- Department of Cardiology, Aarhus University Hospital, Aarhus, Denmark; Department of Clinical Medicine, Faculty of Health, Aarhus University, Aarhus, Denmark
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Berg Hansen K, Christensen S, Birkelund T, Dalgaard F, Wiggers H. Prolonged Cardiogenic Shock Due to Hydrogen Sulfide Intoxication Requiring Long-Term Venoarterial Extracorporeal Membrane Support. JACC: Case Reports 2022; 4:1389-1393. [PMID: 36388715 PMCID: PMC9663905 DOI: 10.1016/j.jaccas.2022.05.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 05/11/2022] [Accepted: 05/26/2022] [Indexed: 11/05/2022]
Abstract
We describe a case of severe biventricular failure and cardiovascular collapse following exposure to the manure gas hydrogen sulfide. Initial tests indicated uncoupling of cellular bioenergetics in addition to myocardial damage. Cardiopulmonary support with venoarterial extracorporeal membrane oxygenation was initiated, and the patient could be successfully weaned from support after 28 days. (Level of Difficulty: Advanced.)
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Affiliation(s)
- Kristoffer Berg Hansen
- Department of Cardiology, Aarhus University Hospital, Aarhus, Denmark
- Department of Clinical Medicine, Faculty of Health, Aarhus University, Aarhus, Denmark
- Address for correspondence: Dr Kristoffer Berg Hansen, Department of Cardiology, Aarhus University Hospital, Palle Juul-Jensens Boulevard 99, DK-8200 Aarhus N, Denmark. @KrisBergHansen
| | | | - Thomas Birkelund
- Department of Anaesthesiology, Aarhus University Hospital, Aarhus, Denmark
| | - Frederik Dalgaard
- Department of Cardiology, Herlev and Gentofte Hospital, Copenhagen, Denmark
| | - Henrik Wiggers
- Department of Cardiology, Aarhus University Hospital, Aarhus, Denmark
- Department of Clinical Medicine, Faculty of Health, Aarhus University, Aarhus, Denmark
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Laurikkala J, Aneman A, Peng A, Reinikainen M, Pham P, Jakkula P, Hästbacka J, Wilkman E, Loisa P, Toppila J, Birkelund T, Blennow K, Zetterberg H, Skrifvars MB. Association of deranged cerebrovascular reactivity with brain injury following cardiac arrest: a post-hoc analysis of the COMACARE trial. Crit Care 2021; 25:350. [PMID: 34583763 PMCID: PMC8477475 DOI: 10.1186/s13054-021-03764-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Accepted: 09/09/2021] [Indexed: 01/27/2023]
Abstract
BACKGROUND Impaired cerebrovascular reactivity (CVR) is one feature of post cardiac arrest encephalopathy. We studied the incidence and features of CVR by near infrared spectroscopy (NIRS) and associations with outcome and biomarkers of brain injury. METHODS A post-hoc analysis of 120 comatose OHCA patients continuously monitored with NIRS and randomised to low- or high-normal oxygen, carbon dioxide and mean arterial blood pressure (MAP) targets for 48 h. The tissue oximetry index (TOx) generated by the moving correlation coefficient between cerebral tissue oxygenation measured by NIRS and MAP was used as a dynamic index of CVR with TOx > 0 indicating impaired reactivity and TOx > 0.3 used to delineate the lower and upper MAP bounds for disrupted CVR. TOx was analysed in the 0-12, 12-24, 24-48 h time-periods and integrated over 0-48 h. The primary outcome was the association between TOx and six-month functional outcome dichotomised by the cerebral performance category (CPC1-2 good vs. 3-5 poor). Secondary outcomes included associations with MAP bounds for CVR and biomarkers of brain injury. RESULTS In 108 patients with sufficient data to calculate TOx, 76 patients (70%) had impaired CVR and among these, chronic hypertension was more common (58% vs. 31%, p = 0.002). Integrated TOx for 0-48 h was higher in patients with poor outcome than in patients with good outcome (0.89 95% CI [- 1.17 to 2.94] vs. - 2.71 95% CI [- 4.16 to - 1.26], p = 0.05). Patients with poor outcomes had a decreased upper MAP bound of CVR over time (p = 0.001), including the high-normal oxygen (p = 0.002), carbon dioxide (p = 0.012) and MAP (p = 0.001) groups. The MAP range of maintained CVR was narrower in all time intervals and intervention groups (p < 0.05). NfL concentrations were higher in patients with impaired CVR compared to those with intact CVR (43 IQR [15-650] vs 20 IQR [13-199] pg/ml, p = 0.042). CONCLUSION Impaired CVR over 48 h was more common in patients with chronic hypertension and associated with poor outcome. Decreased upper MAP bound and a narrower MAP range for maintained CVR were associated with poor outcome and more severe brain injury assessed with NfL. Trial registration ClinicalTrials.gov, NCT02698917 .
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Affiliation(s)
- Johanna Laurikkala
- Department of Anaesthesiology, Intensive Care and Pain Medicine, University of Helsinki and Helsinki University Hospital, Meilahden SairaalaHaartmaninkatu 4, 000290, Helsinki, Finland.
| | - Anders Aneman
- Intensive Care Unit, Liverpool Hospital, South Western Sydney Local Health District, Sydney, Australia.,Faculty of Medicine, The University of New South Wales, Sydney, Australia.,Faculty of Medicine and Health Sciences, Macquarie University, Sydney, Australia
| | - Alexander Peng
- Intensive Care Unit, Liverpool Hospital, South Western Sydney Local Health District, Sydney, Australia
| | - Matti Reinikainen
- Department of Anaesthesiology and Intensive Care, University of Eastern Finland and Kuopio University Hospital, Kuopio, Finland
| | - Paul Pham
- Dept of Anaesthesia, John Hunter Hospital, Newcastle, NSW, Australia
| | - Pekka Jakkula
- Department of Anaesthesiology, Intensive Care and Pain Medicine, University of Helsinki and Helsinki University Hospital, Meilahden SairaalaHaartmaninkatu 4, 000290, Helsinki, Finland
| | - Johanna Hästbacka
- Department of Anaesthesiology, Intensive Care and Pain Medicine, University of Helsinki and Helsinki University Hospital, Meilahden SairaalaHaartmaninkatu 4, 000290, Helsinki, Finland
| | - Erika Wilkman
- Department of Anaesthesiology, Intensive Care and Pain Medicine, University of Helsinki and Helsinki University Hospital, Meilahden SairaalaHaartmaninkatu 4, 000290, Helsinki, Finland
| | - Pekka Loisa
- Department of Intensive Care, Päijät-Häme Central Hospital, Lahti, Finland
| | - Jussi Toppila
- Department of Neurology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | | | - Kaj Blennow
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, The Sahlgrenska Academy at the University of Gothenburg, Mölndal, Sweden.,Clinical Neurochemistry Laboratory, Sahlgrenska University Hospital, Mölndal, Sweden
| | - Henrik Zetterberg
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, The Sahlgrenska Academy at the University of Gothenburg, Mölndal, Sweden.,Clinical Neurochemistry Laboratory, Sahlgrenska University Hospital, Mölndal, Sweden.,DUK Dementia Research Institute at UCL, London, UK.,Department of Neurodegenerative Disease, UCL Institute of Neurology, London, UK
| | - Markus B Skrifvars
- Department of Emergency Care and Services, Helsinki University Hospital and University of Helsinki, Helsinki, Finland
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Birkelund T, Johansen RF, Illum DG, Dyrskog SE, Østergaard JA, Falconer TM, Andersen C, Fridholm H, Overballe-Petersen S, Jensen JS. Fatal 3-Nitropropionic Acid Poisoning after Consuming Coconut Water. Emerg Infect Dis 2021; 27:278-280. [PMID: 33350928 PMCID: PMC7774558 DOI: 10.3201/eid2701.202222] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
We describe the fatal course of a patient with initial symptoms of vomiting and nausea who developed symptoms of dystonia, encephalopathy, and coma. The cause of death was poisoning with 3-nitropropionic acid from coconut water spoiled with the fungus Arthrinium saccharicola. We present the clinical findings and forensic analysis.
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Milandt N, Birkelund T, Engholm M. Acute Chylopericardium With Tamponade and Cardiac Arrest With Pseudomyxoma Peritonei. Am J Cardiol 2021; 146:134-136. [PMID: 33548186 DOI: 10.1016/j.amjcard.2021.01.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2020] [Revised: 01/08/2021] [Accepted: 01/11/2021] [Indexed: 11/16/2022]
Abstract
A 51-year-old woman with pseudomyxoma peritonei developed cardiac arrest 5 days after surgery. Acute echocardiography demonstrated pericardial tamponade. Emergency pericardiocentesis evacuated milky fluid and circulation was re-established. Analysis of the pericardial fluid suggested chylopericardium. In conclusion, this case demonstrates that chylopericardium may be life-threatening and underlines the importance of acute echocardiography in critical management of patients with unexplained shock.
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Affiliation(s)
- Nikolaj Milandt
- Department of Intensive Care Medicine, Aarhus University Hospital, Denmark.
| | - Thomas Birkelund
- Department of Intensive Care Medicine, Aarhus University Hospital, Denmark
| | - Morten Engholm
- Department of Cardiology, Aarhus University Hospital, Denmark
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7
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Ameloot K, Jakkula P, Hästbacka J, Reinikainen M, Pettilä V, Loisa P, Tiainen M, Bendel S, Birkelund T, Belmans A, Palmers PJ, Bogaerts E, Lemmens R, De Deyne C, Ferdinande B, Dupont M, Janssens S, Dens J, Skrifvars MB. Optimum Blood Pressure in Patients With Shock After Acute Myocardial Infarction and Cardiac Arrest. J Am Coll Cardiol 2021; 76:812-824. [PMID: 32792079 DOI: 10.1016/j.jacc.2020.06.043] [Citation(s) in RCA: 49] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Revised: 06/08/2020] [Accepted: 06/12/2020] [Indexed: 11/28/2022]
Abstract
BACKGROUND In patients with shock after acute myocardial infarction (AMI), the optimal level of pharmacologic support is unknown. Whereas higher doses may increase myocardial oxygen consumption and induce arrhythmias, diastolic hypotension may reduce coronary perfusion and increase infarct size. OBJECTIVES This study aimed to determine the optimal mean arterial pressure (MAP) in patients with AMI and shock after cardiac arrest. METHODS This study used patient-level pooled analysis of post-cardiac arrest patients with shock after AMI randomized in the Neuroprotect (Neuroprotective Goal Directed Hemodynamic Optimization in Post-cardiac Arrest Patients; NCT02541591) and COMACARE (Carbon Dioxide, Oxygen and Mean Arterial Pressure After Cardiac Arrest and Resuscitation; NCT02698917) trials who were randomized to MAP 65 mm Hg or MAP 80/85 to 100 mm Hg targets during the first 36 h after admission. The primary endpoint was the area under the 72-h high-sensitivity troponin-T curve. RESULTS Of 235 patients originally randomized, 120 patients had AMI with shock. Patients assigned to the higher MAP target (n = 58) received higher doses of norepinephrine (p = 0.004) and dobutamine (p = 0.01) and reached higher MAPs (86 ± 9 mm Hg vs. 72 ± 10 mm Hg, p < 0.001). Whereas admission hemodynamics and angiographic findings were all well-balanced and revascularization was performed equally effective, the area under the 72-h high-sensitivity troponin-T curve was lower in patients assigned to the higher MAP target (median: 1.14 μg.72 h/l [interquartile range: 0.35 to 2.31 μg.72 h/l] vs. median: 1.56 μg.72 h/l [interquartile range: 0.61 to 4.72 μg. 72 h/l]; p = 0.04). Additional pharmacologic support did not increase the risk of a new cardiac arrest (p = 0.88) or atrial fibrillation (p = 0.94). Survival with good neurologic outcome at 180 days was not different between both groups (64% vs. 53%, odds ratio: 1.55; 95% confidence interval: 0.74 to 3.22). CONCLUSIONS In post-cardiac arrest patients with shock after AMI, targeting MAP between 80/85 and 100 mm Hg with additional use of inotropes and vasopressors was associated with smaller myocardial injury.
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Affiliation(s)
- Koen Ameloot
- Department of Cardiology, Ziekenhuis Oost-Limburg, Genk, Belgium; Department of Cardiology, University Hospitals Leuven, Leuven, Belgium; Faculty of Medicine and Life Sciences, University Hasselt, Diepenbeek, Belgium.
| | - Pekka Jakkula
- Department of Anaesthesiology, Intensive Care and Pain Medicine, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Johanna Hästbacka
- Department of Anaesthesiology, Intensive Care and Pain Medicine, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Matti Reinikainen
- Department of Anaesthesiology and Intensive Care, University of Eastern Finland and Kuopio University Hospital, Kuopio, Finland
| | - Ville Pettilä
- Department of Anaesthesiology, Intensive Care and Pain Medicine, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Pekka Loisa
- Department of Intensive Care, Päijät-Häme Central Hospital, Lahti, Finland
| | - Marjaana Tiainen
- Department of Neurology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Stepani Bendel
- Department of Intensive Care, Kuopio University Hospital, Kuopio, Finland
| | | | - Ann Belmans
- Department of Cardiology, University Hospitals Leuven, Leuven, Belgium
| | | | - Eline Bogaerts
- Department of Cardiology, University Hospitals Leuven, Leuven, Belgium
| | - Robin Lemmens
- Department of Neurology, University Hospitals Leuven, Leuven, Belgium; VIB, Center for Brain & Disease Research, Laboratory of Neurobiology, Leuven, Belgium; KU Leuven-University of Leuven, Department of Neurosciences, Experimental Neurology, and Leuven Brain Institute (LBI), Leuven, Belgium
| | - Cathy De Deyne
- Faculty of Medicine and Life Sciences, University Hasselt, Diepenbeek, Belgium; Department of Anesthesiology and Critical Care Medicine, Ziekenhuis Oost-Limburg, Genk, Belgium
| | - Bert Ferdinande
- Department of Cardiology, Ziekenhuis Oost-Limburg, Genk, Belgium
| | - Matthias Dupont
- Department of Cardiology, Ziekenhuis Oost-Limburg, Genk, Belgium
| | - Stefan Janssens
- Department of Cardiology, University Hospitals Leuven, Leuven, Belgium
| | - Joseph Dens
- Department of Cardiology, Ziekenhuis Oost-Limburg, Genk, Belgium; Faculty of Medicine and Life Sciences, University Hasselt, Diepenbeek, Belgium
| | - Markus B Skrifvars
- Department of Anaesthesiology, Intensive Care and Pain Medicine, University of Helsinki and Helsinki University Hospital, Helsinki, Finland; Department of Emergency Medicine and Services, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
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Jakkula P, Hästbacka J, Reinikainen M, Pettilä V, Loisa P, Tiainen M, Wilkman E, Bendel S, Birkelund T, Pulkkinen A, Bäcklund M, Heino S, Karlsson S, Kopponen H, Skrifvars MB. Near-infrared spectroscopy after out-of-hospital cardiac arrest. Crit Care 2019; 23:171. [PMID: 31088512 PMCID: PMC6518726 DOI: 10.1186/s13054-019-2428-3] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Accepted: 04/09/2019] [Indexed: 11/24/2022]
Abstract
Background Cerebral hypoperfusion may aggravate neurological damage after cardiac arrest. Near-infrared spectroscopy (NIRS) provides information on cerebral oxygenation but its relevance during post-resuscitation care is undefined. We investigated whether cerebral oxygen saturation (rSO2) measured with NIRS correlates with the serum concentration of neuron-specific enolase (NSE), a marker of neurological injury, and with clinical outcome in out-of-hospital cardiac arrest (OHCA) patients. Methods We performed a post hoc analysis of a randomised clinical trial (COMACARE, NCT02698917) comparing two different levels of carbon dioxide, oxygen and arterial pressure after resuscitation from OHCA with ventricular fibrillation as the initial rhythm. We measured rSO2 in 118 OHCA patients with NIRS during the first 36 h of intensive care. We determined the NSE concentrations from serum samples at 48 h after cardiac arrest and assessed neurological outcome with the Cerebral Performance Category (CPC) scale at 6 months. We evaluated the association between rSO2 and serum NSE concentrations and the association between rSO2 and good (CPC 1–2) and poor (CPC 3–5) neurological outcome. Results The median (inter-quartile range (IQR)) NSE concentration at 48 h was 17.5 (13.4–25.0) μg/l in patients with good neurological outcome and 35.2 (22.6–95.8) μg/l in those with poor outcome, p < 0.001. We found no significant correlation between median rSO2 and NSE at 48 h, rs = − 0.08, p = 0.392. The median (IQR) rSO2 during the first 36 h of intensive care was 70.0% (63.5–77.0%) in patients with good outcome and 71.8% (63.3–74.0%) in patients with poor outcome, p = 0.943. There was no significant association between rSO2 over time and neurological outcome. In a binary logistic regression model, rSO2 was not a statistically significant predictor of good neurological outcome (odds ratio 0.99, 95% confidence interval 0.94–1.04, p = 0.635). Conclusions We found no association between cerebral oxygenation measured with NIRS and NSE concentrations or outcome in patients resuscitated from OHCA. Trial registration ClinicalTrials.gov, NCT02698917. Registered on 26 January 2016. Electronic supplementary material The online version of this article (10.1186/s13054-019-2428-3) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Pekka Jakkula
- Department of Anaesthesiology, Intensive Care and Pain Medicine, University of Helsinki and Helsinki University Hospital, Helsinki, Finland.
| | - Johanna Hästbacka
- Department of Anaesthesiology, Intensive Care and Pain Medicine, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Matti Reinikainen
- Department of Anaesthesiology and Intensive Care, University of Eastern Finland and Kuopio University Hospital, Kuopio, Finland
| | - Ville Pettilä
- Department of Anaesthesiology, Intensive Care and Pain Medicine, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Pekka Loisa
- Department of Intensive Care, Päijät-Häme Central Hospital, Lahti, Finland
| | - Marjaana Tiainen
- Department of Neurology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Erika Wilkman
- Department of Anaesthesiology, Intensive Care and Pain Medicine, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Stepani Bendel
- Department of Intensive Care, Kuopio University Hospital, Kuopio, Finland
| | | | - Anni Pulkkinen
- Department of Intensive Care, Central Finland Central Hospital, Jyväskylä, Finland
| | - Minna Bäcklund
- Department of Anaesthesiology, Intensive Care and Pain Medicine, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Sirkku Heino
- Department of Anaesthesiology and Intensive Care, North Karelia Central Hospital, Joensuu, Finland
| | - Sari Karlsson
- Department of Intensive Care, Tampere University Hospital, Tampere, Finland
| | - Hiski Kopponen
- Department of Anaesthesiology, Intensive Care and Pain Medicine, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Markus B Skrifvars
- Department of Emergency Medicine and Services, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
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9
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Jakkula P, Pettilä V, Skrifvars MB, Hästbacka J, Loisa P, Tiainen M, Wilkman E, Toppila J, Koskue T, Bendel S, Birkelund T, Laru-Sompa R, Valkonen M, Reinikainen M. Targeting low-normal or high-normal mean arterial pressure after cardiac arrest and resuscitation: a randomised pilot trial. Intensive Care Med 2018; 44:2091-2101. [PMID: 30443729 PMCID: PMC6280836 DOI: 10.1007/s00134-018-5446-8] [Citation(s) in RCA: 128] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Accepted: 11/02/2018] [Indexed: 11/29/2022]
Abstract
PURPOSE We aimed to determine the feasibility of targeting low-normal or high-normal mean arterial pressure (MAP) after out-of-hospital cardiac arrest (OHCA) and its effect on markers of neurological injury. METHODS In the Carbon dioxide, Oxygen and Mean arterial pressure After Cardiac Arrest and REsuscitation (COMACARE) trial, we used a 23 factorial design to randomly assign patients after OHCA and resuscitation to low-normal or high-normal levels of arterial carbon dioxide tension, to normoxia or moderate hyperoxia, and to low-normal or high-normal MAP. In this paper we report the results of the low-normal (65-75 mmHg) vs. high-normal (80-100 mmHg) MAP comparison. The primary outcome was the serum concentration of neuron-specific enolase (NSE) at 48 h after cardiac arrest. The feasibility outcome was the difference in MAP between the groups. Secondary outcomes included S100B protein and cardiac troponin (TnT) concentrations, electroencephalography (EEG) findings, cerebral oxygenation and neurological outcome at 6 months after cardiac arrest. RESULTS We recruited 123 patients and included 120 in the final analysis. We found a clear separation in MAP between the groups (p < 0.001). The median (interquartile range) NSE concentration at 48 h was 20.6 µg/L (15.2-34.9 µg/L) in the low-normal MAP group and 22.0 µg/L (13.6-30.9 µg/L) in the high-normal MAP group, p = 0.522. We found no differences in the secondary outcomes. CONCLUSIONS Targeting a specific range of MAP was feasible during post-resuscitation intensive care. However, the blood pressure level did not affect the NSE concentration at 48 h after cardiac arrest, nor any secondary outcomes.
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Affiliation(s)
- Pekka Jakkula
- Department of Anaesthesiology, Intensive Care and Pain Medicine, University of Helsinki and Helsinki University Hospital, Helsinki, Finland.
| | - Ville Pettilä
- Department of Anaesthesiology, Intensive Care and Pain Medicine, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Markus B Skrifvars
- Department of Anaesthesiology, Intensive Care and Pain Medicine, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
- Department of Emergency Medicine and Services, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Johanna Hästbacka
- Department of Anaesthesiology, Intensive Care and Pain Medicine, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Pekka Loisa
- Department of Intensive Care, Päijät-Häme Central Hospital, Lahti, Finland
| | - Marjaana Tiainen
- Department of Neurology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Erika Wilkman
- Department of Anaesthesiology, Intensive Care and Pain Medicine, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Jussi Toppila
- HUS Medical Imaging Center, Clinical Neurophysiology, Helsinki University Hospital and University of Helsinki, Helsinki, Finland
| | - Talvikki Koskue
- Department of Anaesthesiology, Intensive Care and Pain Medicine, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Stepani Bendel
- Department of Intensive Care, Kuopio University Hospital, Kuopio, Finland
| | | | - Raili Laru-Sompa
- Department of Intensive Care, Central Finland Central Hospital, Jyväskylä, Finland
| | - Miia Valkonen
- Department of Anaesthesiology, Intensive Care and Pain Medicine, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Matti Reinikainen
- Department of Intensive Care, North Karelia Central Hospital, Joensuu, Finland
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10
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Jakkula P, Reinikainen M, Hästbacka J, Loisa P, Tiainen M, Pettilä V, Toppila J, Lähde M, Bäcklund M, Okkonen M, Bendel S, Birkelund T, Pulkkinen A, Heinonen J, Tikka T, Skrifvars MB. Targeting two different levels of both arterial carbon dioxide and arterial oxygen after cardiac arrest and resuscitation: a randomised pilot trial. Intensive Care Med 2018; 44:2112-2121. [PMID: 30430209 PMCID: PMC6280824 DOI: 10.1007/s00134-018-5453-9] [Citation(s) in RCA: 123] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2018] [Accepted: 11/03/2018] [Indexed: 12/21/2022]
Abstract
Purpose We assessed the effects of targeting low-normal or high-normal arterial carbon dioxide tension (PaCO2) and normoxia or moderate hyperoxia after out-of-hospital cardiac arrest (OHCA) on markers of cerebral and cardiac injury. Methods Using a 23 factorial design, we randomly assigned 123 patients resuscitated from OHCA to low-normal (4.5–4.7 kPa) or high-normal (5.8–6.0 kPa) PaCO2 and to normoxia (arterial oxygen tension [PaO2] 10–15 kPa) or moderate hyperoxia (PaO2 20–25 kPa) and to low-normal or high-normal mean arterial pressure during the first 36 h in the intensive care unit. Here we report the results of the low-normal vs. high-normal PaCO2 and normoxia vs. moderate hyperoxia comparisons. The primary endpoint was the serum concentration of neuron-specific enolase (NSE) 48 h after cardiac arrest. Secondary endpoints included S100B protein and cardiac troponin concentrations, continuous electroencephalography (EEG) and near-infrared spectroscopy (NIRS) results and neurologic outcome at 6 months. Results In total 120 patients were included in the analyses. There was a clear separation in PaCO2 (p < 0.001) and PaO2 (p < 0.001) between the groups. The median (interquartile range) NSE concentration at 48 h was 18.8 µg/l (13.9–28.3 µg/l) in the low-normal PaCO2 group and 22.5 µg/l (14.2–34.9 µg/l) in the high-normal PaCO2 group, p = 0.400; and 22.3 µg/l (14.8–27.8 µg/l) in the normoxia group and 20.6 µg/l (14.2–34.9 µg/l) in the moderate hyperoxia group, p = 0.594). High-normal PaCO2 and moderate hyperoxia increased NIRS values. There were no differences in other secondary outcomes. Conclusions Both high-normal PaCO2 and moderate hyperoxia increased NIRS values, but the NSE concentration was unaffected. Registration ClinicalTrials.gov, NCT02698917. Registered on January 26, 2016. Electronic supplementary material The online version of this article (10.1007/s00134-018-5453-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Pekka Jakkula
- Department of Anaesthesiology, Intensive Care and Pain Medicine, University of Helsinki and Helsinki University Hospital, Helsinki, Finland.
| | - Matti Reinikainen
- Department of Intensive Care, North Karelia Central Hospital, Joensuu, Finland
| | - Johanna Hästbacka
- Department of Anaesthesiology, Intensive Care and Pain Medicine, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Pekka Loisa
- Department of Intensive Care, Päijät-Häme Central Hospital, Lahti, Finland
| | - Marjaana Tiainen
- Department of Neurology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Ville Pettilä
- Department of Anaesthesiology, Intensive Care and Pain Medicine, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Jussi Toppila
- Clinical Neurophysiology, HUS Medical Imaging Center, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Marika Lähde
- Department of Anaesthesia and Intensive Care, Päijät-Häme Central Hospital, Lahti, Finland
| | - Minna Bäcklund
- Department of Anaesthesiology, Intensive Care and Pain Medicine, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Marjatta Okkonen
- Department of Anaesthesiology, Intensive Care and Pain Medicine, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Stepani Bendel
- Department of Intensive Care, Kuopio University Hospital, Kuopio, Finland
| | | | - Anni Pulkkinen
- Department of Anaesthesia and Intensive Care, Central Finland Central Hospital, Jyväskylä, Finland
| | - Jonna Heinonen
- Department of Anaesthesiology, Intensive Care and Pain Medicine, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Tuukka Tikka
- Department of Anaesthesiology, Intensive Care and Pain Medicine, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Markus B Skrifvars
- Department of Anaesthesiology, Intensive Care and Pain Medicine, University of Helsinki and Helsinki University Hospital, Helsinki, Finland.,Department of Emergency Medicine and Services, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
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11
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Jakkula P, Reinikainen M, Hästbacka J, Pettilä V, Loisa P, Karlsson S, Laru-Sompa R, Bendel S, Oksanen T, Birkelund T, Tiainen M, Toppila J, Hakkarainen A, Skrifvars MB. Targeting low- or high-normal Carbon dioxide, Oxygen, and Mean arterial pressure After Cardiac Arrest and REsuscitation: study protocol for a randomized pilot trial. Trials 2017; 18:507. [PMID: 29084585 PMCID: PMC5663085 DOI: 10.1186/s13063-017-2257-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Accepted: 10/16/2017] [Indexed: 12/02/2022] Open
Abstract
Background Arterial carbon dioxide tension (PaCO2), oxygen tension (PaO2), and mean arterial pressure (MAP) are modifiable factors that affect cerebral blood flow (CBF), cerebral oxygen delivery, and potentially the course of brain injury after cardiac arrest. No evidence regarding optimal treatment targets exists. Methods The Carbon dioxide, Oxygen, and Mean arterial pressure After Cardiac Arrest and REsuscitation (COMACARE) trial is a pilot multi-center randomized controlled trial (RCT) assessing the feasibility of targeting low- or high-normal PaCO2, PaO2, and MAP in comatose, mechanically ventilated patients after out-of-hospital cardiac arrest (OHCA), as well as its effect on brain injury markers. Using a 23 factorial design, participants are randomized upon admission to an intensive care unit into one of eight groups with various combinations of PaCO2, PaO2, and MAP target levels for 36 h after admission. The primary outcome is neuron-specific enolase (NSE) serum concentration at 48 h after cardiac arrest. The main feasibility outcome is the between-group differences in PaCO2, PaO2, and MAP during the 36 h after ICU admission. Secondary outcomes include serum concentrations of NSE, S100 protein, and cardiac troponin at 24, 48, and 72 h after cardiac arrest; cerebral oxygenation, measured with near-infrared spectroscopy (NIRS); potential differences in epileptic activity, monitored via continuous electroencephalogram (EEG); and neurological outcomes at six months after cardiac arrest. Discussion The trial began in March 2016 and participant recruitment has begun in all seven study sites as of March 2017. Currently, 115 of the total of 120 patients have been included. When completed, the results of this trial will provide preliminary clinical evidence regarding the feasibility of targeting low- or high-normal PaCO2, PaO2, and MAP values and its effect on developing brain injury, brain oxygenation, and epileptic seizures after cardiac arrest. The results of this trial will be used to evaluate whether a larger RCT on this subject is justified. Trial registration ClinicalTrials.gov, NCT02698917. Registered on 26 January 2016. Electronic supplementary material The online version of this article (doi:10.1186/s13063-017-2257-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Pekka Jakkula
- University of Helsinki and Helsinki University Hospital, Helsinki, Finland.
| | | | - Johanna Hästbacka
- University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Ville Pettilä
- University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Pekka Loisa
- Päijät-Häme Central Hospital, Lahti, Finland
| | | | | | | | | | | | - Marjaana Tiainen
- University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Jussi Toppila
- University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Antti Hakkarainen
- University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Markus B Skrifvars
- University of Helsinki and Helsinki University Hospital, Helsinki, Finland.,Australia and New Zealand Intensive Care Research Centre, School of Public Health and Preventive Medicine, Monash University, Melbourne, VIC, Australia
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Birkelund T, Obad DS, Matejec R, Bøtker HE, Ravn HB. Remote ischemic preconditioning does not increase circulating or effector organ concentrations of proopiomelanocortin derivates. SCAND CARDIOVASC J 2015; 49:257-63. [DOI: 10.3109/14017431.2015.1046401] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Thomas Birkelund
- Department of Anesthesiology and Intensive Care, Aarhus University Hospital, Skejby, Denmark
| | - Damir Salskov Obad
- Department of Anesthesiology and Intensive Care, Aarhus University Hospital, Skejby, Denmark
| | - Reginald Matejec
- Department of Anesthesiology and Intensive Care Medicine and Pain Therapy, Justus-Liebig-University, Giessen, Germany
| | - Hans Erik Bøtker
- Department of Cardiology, Aarhus University Hospital, Skejby, Denmark
| | - Hanne Berg Ravn
- Department of Anesthesiology and Intensive Care, Aarhus University Hospital, Skejby, Denmark
- Department of Cardiology, Aarhus University Hospital, Skejby, Denmark
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13
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Hjørringgaard J, Birkelund T, Ravn HB. [Cardiac arrest and cardial insuffiency as result of thyrotoxicosis]. Ugeskr Laeger 2013; 175:962-963. [PMID: 23582070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
A 52-year-old woman, who had an out-of-hospital cardiac arrest, was resuscitated, intubated and transferred with cardiogenic shock to angioplasty of the right coronary artery. Afterwards the patient had normal biventricular function, but four days later she developed atrial fibrillation and recurrent cardiogenic shock with a left ventricular ejection fraction of 20%. Thyrotoxic crisis was determined as the underlying cause; and antithyroid treatment stabilised the patient's haemodynamics completely within 24 hours. The importance of high thyroxine levels in patients with ischaemic heart disease is discussed.
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Affiliation(s)
- Jane Hjørringgaard
- Anæstesiologisk Afdeling, Regionshospitalet Herning, Gl. Landevej 61, 7400 Herning, Denmark.
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14
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Birkelund T, Revenfeld TS, Møller JF. [Transient segmental hyperalgesia following epidural analgesia]. Ugeskr Laeger 2012; 174:1447-1448. [PMID: 22640783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We present a case of transient segmental neurological reaction secondary to administration of local anaesthetics for epidural analgesia in a 42 year-old woman. An epidural catheter was introduced between thoracic intervertebral interspace 9 and 10. The patient received morphine, lidocaine, bupivacaine and ropivacaine. After 14 hours she experienced symptoms with burning intense pain, hyperalgesia with the upper limit just below the chest and the lower limit in the midfemur. The symptoms disappeared after 36 hours.
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Affiliation(s)
- Thomas Birkelund
- Anæstesiologisk Afdeling, Universitetshospital, Skejby, Brendstrupgårdsvej 100, Aarhus N.
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Birkelund T, Hakansson E. The terminal Cretaceous extinction in Boreal shelf seas—A multicausal event. Geological Society of America Special Papers 1982. [DOI: 10.1130/spe190-p373] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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16
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Abstract
Ammonites from Nûgssuaq and Svartenhuk, belonging to the genera Hypophylloceras, Saghalinites, Pseudophyllites, Baculites, Diplomoceras, Scaphites, Clioscaphites, Haresiceras and Borissjakoceras, are described. Baculites and Scaphites are richly represented, and the material provides a basis for evaluating the subgenera Hoploscaphites and Discoscaphites. The ontogeny and the phylogeny of most of the genera are discussed and juvenile stages of Saghalinites and Scaphites described. Eleven new species and three new subspecies are introduced. The stratigraphical, palaeogeographical and palaeoecological aspeets of the ammonite assemblages are considered, and a discussion of sexual dimorphism in Scaphites is given. The presence of 12 biozones from the Upper Turonian?, Coniacian, Santonian, Campanian and Maastrichtian is demonstrated. The stratigraphical correlation of European and North American Upper Cretaceous deposits is discussed and the West Greenland zones are correlated with North American and European ammonite zones. All the Upper Turonian ?-Santonian species have affinities with species endemic to the Western Interior of North America. One of the genera, Clioscaphites from the Santonian, occur only within that area. The Campanian scaphites and baculites are at first mostly like species from the Interior of North America, later, in the Upper Campanian, European affinities are more prominent. Haresiceras from the Lower Campanian is endemic to the Western Interior of North America. The Maastrichtian scaphites and baculites are closely related to endemic species from the Interior of North America, principally from the Fox Hills Formation of the type area. Hypophylloceras, Saghalinites and Pseudophyllites from the Campanian-Maastrichtian have Indo-Pacific relations and Diplomoceras may be related to European forms. The ammonites, together with the belemnites and inoceramids from the area, so far as they are identified, show that a sea-way to the north, through the Arctic Seas, conneeted this area with the Interior of North America from the Upper Turonian or Coniacian to the Maastrichtian. The area apparently was also connected with Europe by a sea-way during that part of the Upper Cretaceous. The occurrence of ammonites with Indo-Pacific affinities may further indicate the presence of a northern sea-way between the Pacific and the Arctic Seas during parts of the Campanian-Maastrichtian interval.Scaphites is given. The presence of 12 biozones from the Upper Turonian?, Coniacian, Santonian, Campanian and Maastrichtian is demonstrated. The stratigraphical correlation of European and North American Upper Cretaceous deposits is discussed and the West Greenland zones are correlated with North American and European ammonite zones. All the Upper Turonian ?-Santonian species have affinities with species endemic to the Western Interior of North America. One of the genera, Clioscaphites from the Santonian, occur only within that area. The Campanian scaphites and baculites are at first mostly like species from the Interior of North America, later, in the Upper Campanian, European affinities are more prominent. Haresiceras from the Lower Campanian is endemic to the Western Interior of North America. The Maastrichtian scaphites and baculites are closely related to endemic species from the Interior of North America, principally from the Fox Hills Formation of the type area. Hypophylloceras, Saghalinites and Pseudophyllites from the Campanian-Maastrichtian have Indo-Pacific relations and Diplomoceras may be related to European forms. The ammonites, together with the belemnites and inoceramids from the area, so far as they are identified, show that a sea-way to the north, through the Arctic Seas, conneeted this area with the Interior of North America from the Upper Turonian or Coniacian to the Maastrichtian. The area apparently was also connected with Europe by a sea-way during that part of the Upper Cretaceous. The occurrence of ammonites with Indo-Pacific affinities may further indicate the presence of a northern sea-way between the Pacific and the Arctic Seas during parts of the Campanian-Maastrichtian interval.
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