Research Topics
| Lars WikSummaryCountry: Norway Publications
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Detail Information
Publications
Delaying defibrillation to give basic cardiopulmonary resuscitation to patients with out-of-hospital ventricular fibrillation: a randomized trialLars Wik
Norwegian Competence Center for Emergency Medicine, Institute for Experimental Medical Research, Ulleval University Hospital, N 0407 Oslo, Norway
JAMA 289:1389-95. 2003..A nonrandomized study indicates that after a few minutes of ventricular fibrillation, delaying defibrillation to give cardiopulmonary resuscitation (CPR) first might improve the outcome...- Quality of out-of-hospital cardiopulmonary resuscitation with real time automated feedback: a prospective interventional studyJo Kramer-Johansen
Institute for Experimental Medical Research, University of Oslo, N 0407 Oslo, Norway
Resuscitation 71:283-92. 2006..To compare quality of CPR during out-of-hospital cardiac arrest with and without automated feedback... - Arterial blood gases during basic life support of human cardiac arrest victimsMorten Pytte
Institute for Experimental Medical Research and Department of Anaesthesiology, Ulleval University Hospital, Kirkeveien 166, N 0407 Oslo, Norway
Resuscitation 77:35-8. 2008..Ventilation with tidal volumes sufficient to raise the victim's chest is an integral part of guidelines for lay-rescuer basic life support, but optimal tidal volume, frequency and ratio to chest compressions are not known... 
Intravenous drug administration during out-of-hospital cardiac arrest: a randomized trialTheresa M Olasveengen
Institute for Experimental Medical Research, Oslo University Hospital, Ullevaal, N 0407 Oslo, Norway
JAMA 302:2222-9. 2009....- Twelve-month retention of CPR skills with automatic correcting verbal feedbackLars Wik
National Center of Competence in Emergency Medicine, Division of Prehospital Emergency Medicine, Ulleval University Hospital, N 0407 Oslo, Norway
Resuscitation 66:27-30. 2005..To evaluate the retention of CPR skills 12 months after initial training, using a manikin equipped with a computer-based voice advisory feedback system... - Chest compressions by ambulance personnel on chests with variable stiffness: abilities and attitudesSilje Ødegaard
University of Oslo, Faculty Division Ulleval University Hospital, N 0407 Oslo, Norway
Resuscitation 74:127-34. 2007..Quality of cardiopulmonary resuscitation (CPR) performed by professionals is reported to be substandard even with automated corrective feedback. We hypothesised that lack of quality is not due to physical capabilities... - Quality of cardiopulmonary resuscitation before and during transport in out-of-hospital cardiac arrestTheresa M Olasveengen
Institute for Experimental Medical Research and Department of Anaesthesiology, Division Ulleval University Hospital, University of Oslo, N 0407 Oslo, Norway
Resuscitation 76:185-90. 2008..To evaluate quality of cardiopulmonary resuscitation (CPR) performed during transport after out-of-hospital cardiac arrest... - Is CPR quality improving? A retrospective study of out-of-hospital cardiac arrestTheresa M Olasveengen
Institute for Experimental Medical Research, Ulleval University Hospital, University of Oslo, N 0407 Oslo, Norway
Resuscitation 75:260-6. 2007..To evaluate the quality of cardiopulmonary resuscitation (CPR) performed by a physician-manned ambulance, and assess whether it changed with time influenced by developing scientific evidence and guideline changes... - A failed attempt to improve quality of out-of-hospital CPR through performance evaluationTheresa Mariero Olasveengen
Institute for Experimental Medical Research, Ulleval University Hospital, Oslo, Norway
Prehosp Emerg Care 11:427-33. 2007..Our hypothesis was that providing CPR performance evaluation (CPR-PE) to three ambulance services would facilitate local education and implementation of CPR guidelines and, consequently, improve CPR quality... - Mechanical chest compressions with trapezoidal waveform improve haemodynamics during cardiac arrestJo Kramer-Johansen
Institute for Experimental Medical Research, Oslo University Hospital, Oslo, Norway
Resuscitation 82:213-8. 2011..We studied the haemodynamic differences of such waveforms in a porcine model of cardiac arrest... - Improving outcome after out-of-hospital cardiac arrest by strengthening weak links of the local Chain of Survival; quality of advanced life support and post-resuscitation careInger Lund-Kordahl
Institute for Experimental Medical Research, Oslo University Hospital Ulleval, N 0407 Oslo, Norway
Resuscitation 81:422-6. 2010..We wanted to assess if targeted attempts to strengthen the weak links of our local chain; quality of advanced life support (ALS) and post-resuscitation care, would improve outcome... - Progressing from initial non-shockable rhythms to a shockable rhythm is associated with improved outcome after out-of-hospital cardiac arrestTheresa M Olasveengen
Institute for Experimental Medical Research, Ulleval University Hospital, N 0407 Oslo, Norway
Resuscitation 80:24-9. 2009..We wanted to confirm this observation in our prospectively collected database, and assess whether differences in cardiopulmonary resuscitation (CPR) quality could help to explain any such difference in outcome... - Acute ischemic heart disease alters ventricular fibrillation waveform characteristics in out-of hospital cardiac arrestTheresa M Olasveengen
Institute for Experimental Medical Research and Department of Anaesthesiology, Ulleval University Hospital, N 0407 Oslo, Norway
Resuscitation 80:412-7. 2009..We wanted to confirm these recent animal data in humans and explore the possibility for such characteristics to identify acute ischemia during cardiac arrest... - Advanced life support performance with manual and mechanical chest compressions in a randomized, multicentre manikin studyOystein Tomte
Institute for Experimental Medical Research, Surgical Division, University of Oslo, Norway
Resuscitation 80:1152-7. 2009..Study site variability in these factors coupled to randomization of cardiopulmonary resuscitation (CPR) method was studied during simulated cardiac arrest prior to a multicentre clinical trial... - Haemodynamic effects of adrenaline (epinephrine) depend on chest compression quality during cardiopulmonary resuscitation in pigsMorten Pytte
Department of Anaesthesiology, Ulleval University Hospital, Oslo, Norway
Resuscitation 71:369-78. 2006..We have studied the haemodynamic effects of adrenaline during CPR with good laboratory quality and with quality simulating clinical findings and the feasibility of monitoring these effects through VF waveform analysis... - Quality of cardiopulmonary resuscitation during out-of-hospital cardiac arrestLars Wik
National Competence Center for Emergency Medicine, Ulleval University Hospital, Oslo, Norway
JAMA 293:299-304. 2005..Electrocardiographic analysis and defibrillation accounted for only small parts of intervals without chest compressions... - Evaluation of a defibrillator-basic cardiopulmonary resuscitation programme for non medical personnelLars Wik
Department of Emergency Medical Services, Division of Surgery, Ulleval University Hospital, N 0407 Oslo, Norway
Resuscitation 56:167-72. 2003..The present study also supports the need for annual training and recertification... - Pauses in chest compression and inappropriate shocks: a comparison of manual and semi-automatic defibrillation attemptsJo Kramer-Johansen
Institute for Experimental Medical Research, Ullevaal University Hospital, N 0407 Oslo, Norway
Resuscitation 73:212-20. 2007..We hypothesised that pauses are shorter for manual defibrillation by trained rescuers, but with an increased number of inappropriate shocks given for a non-VF/VT rhythm... - Rediscovering the importance of chest compressions to improve the outcome from cardiac arrestLars Wik
Norwegian Competence Center for Emergency Medicine, Norway
Resuscitation 58:267-9. 2003 - Transthoracic impedance used to evaluate performance of cardiopulmonary resuscitation during out of hospital cardiac arrestFrederik S Stecher
National Competence Centre of Emergency Medicine, Institute for Experimental Medical Research, Ulleval University Hospital, 0027 Oslo, Norway
Resuscitation 79:432-7. 2008..Our goal was to do this using defibrillator technology based on changes in transthoracic impedance (TTI) produced by chest compressions and ventilations... - Advanced cardiac life support before and after tracheal intubation--direct measurements of qualityJo Kramer-Johansen
Institute for Experimental Medical Research, University of Oslo, Ulleval University Hospital, N 0407 Oslo, Norway
Resuscitation 68:61-9. 2006..Tracheal intubation should improve the quality of cardiopulmonary resuscitation (CPR) by enabling adequate ventilation without pauses in external chest compressions... - Standard versus over-the-head cardiopulmonary resuscitation during simulated advanced life supportGeorg Bollig
Division of Surgery, Ulleval University Hospital, Oslo, Norway
Prehosp Emerg Care 11:443-7. 2007..The aim of the present study was to evaluate quality of OTH versus standard CPR with bag-valve-mask (BVM) ventilation in a manikin model during advanced life support (ALS)... - Inspiratory impedance threshold valve during CPRAudun Langhelle
Institute for Experimental Medical Research, Ulleval University Hospital, N 0407 Oslo, Norway
Resuscitation 52:39-48. 2002..The valve is a promising new tool in CPR, but more independent studies of the device are needed... - Use of an automatic mechanical chest compression device (LUCAS) as a bridge to establishing cardiopulmonary bypass for a patient with hypothermic cardiac arrestLars Wik
The National Competence Center for Emergency Medicine, Ulleval University Hospital, Oslo, Norway
Resuscitation 66:391-4. 2005..5 h of mechanical chest compression. This was followed with rapid rewarming on cardiopulmonary bypass and resulted in good physical and mental recovery. This management option should be considered for similar victims... - Cardiac arrest and resuscitation with an automatic mechanical chest compression device (LUCAS) due to anaphylaxis of a woman receiving caesarean section because of pre-eclampsiaTor Thomas Vatsgar
Ulleval University Hospital, Department of Anesthesiology, Oslo, Norway
Resuscitation 68:155-9. 2006..She awoke the next day with no sequelae. She had some suction cup marks on the sternum but otherwise no complications of the chest compressions. At follow up by phone 1 month later, she and her baby were doing well... - Rapid extrication from a car wreckLars Wik
Division of Prehospital Emergency Medicine, Ulleval University Hospital, Oslo, Norway
Injury 35:739-45. 2004..001], and patient on the stretcher ready for transport to the hospital [617+/-112 versus 387+/-65, CI 112-347, P=0.001]. Avoiding uncontrolled movements in the wreck was not more difficult with the new than the standard technique... - Retention of basic life support skills 6 months after training with an automated voice advisory manikin system without instructor involvementLars Wik
National Centre of Competence in Emergency Medicine, Ulleval University Hospital, Kirkevn 166, N 0407, Oslo, Norway
Resuscitation 52:273-9. 2002..To evaluate the retention of skills 6 months after training in ventilation and chest compressions (CPR) on a manikin with computer based on-line voice advisory feedback and the possible effects of initial overtraining... - Effects of cardiopulmonary resuscitation on predictors of ventricular fibrillation defibrillation success during out-of-hospital cardiac arrestTrygve Eftestøl
Stavanger University College, Department of Electrical and Computer Engineering, PO Box 8002, 4068 Stavanger, Norway
Circulation 110:10-5. 2004..To examine whether CPR improves myocardial readiness for defibrillation, we analyzed whether CPR causes changes in predictors of defibrillation success calculated from the ventricular fibrillation waveform... - Independent evaluation of a defibrillation outcome predictor for out-of-hospital cardiac arrested patientsTrygve Eftestøl
University of Stavanger, Faculty of Science and Technology, Department of Electrical and Computer Engineering, N 4036 Stavanger, Norway
Resuscitation 67:55-61. 2005..As in the present study, future testing should be performed on totally independent data not included in the design of the outcome predictor to get a reliable impression of expected performance... - Effects of compression depth and pre-shock pauses predict defibrillation failure during cardiac arrestDana P Edelson
Section of General Internal Medicine, University of Chicago Hospitals, Chicago, IL 60637, United States
Resuscitation 71:137-45. 2006..Strategies to correct these deficiencies should be developed and consideration should be made to replacing current-generation automated external defibrillators that require long pre-shock pauses for rhythm analysis... - [Prehospital ECG reduces time to treatment with percutaneous coronary interventions]Anders Aasheim
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Tidsskr Nor Laegeforen 123:1353-4. 2003 - Reconfirmation algorithms should be the standard of care in automated external defibrillatorsJo Kramer-Johansen
Resuscitation 70:474-5; author reply 475. 2006 - Continuous mechanical chest compressions during cardiac arrest to facilitate restoration of coronary circulation with percutaneous coronary interventionHaakon Kiil Grogaard
J Am Coll Cardiol 50:1093-4. 2007 - Quality of lay person CPR performance with compression: ventilation ratios 15:2, 30:2 or continuous chest compressions without ventilations on manikinsSilje Odegaard
University of Oslo, Division Ulleval University Hospital, Norway
Resuscitation 71:335-40. 2006..In conclusion, continuous chest compressions without ventilations gave significantly more chest compressions per minute, but with decreased compression quality. No flow time for 30:2 was significantly less than for 15:2... - Airway management by paramedics using endotracheal intubation with a laryngoscope versus the oesophageal tracheal Combitube and EasyTube on manikins: a randomised experimental trialGeorg Bollig
Department of Emergency Medicine and Anaesthesiology, Telemark Hospital Skien, N 3710 Skien, Norway
Resuscitation 71:107-11. 2006..The EasyTube, which is constructed in a similar way to the Combitube, is a recently introduced alternative to tracheal intubation for airway management in emergency medicine...