Publications 2022

Berve PO, Hardig BM, Skalhegg T, Kongsgaard H, Kramer-Johansen J, Wik L (2022)
Clinical paper Mechanical active compression-decompression versus standard mechanical cardiopulmonary resuscitation: A randomised haemodynamic out-of-hospital cardiac arrest study
Resuscitation, 170, 1-10
DOI 10.1016/j.resuscitation.2021.10.026

Publications 2021

Alm-Kruse K, Sorensen G, Osbakk SA, Sunde K, Bendz B, Andersen GO, Fiane A, Hagen OA, Kramer-Johansen J (2021)
Outcome in refractory out-of-hospital cardiac arrest before and after implementation of an ECPR protocol
Resuscitation, 162, 35-42
DOI 10.1016/j.resuscitation.2021.01.038

Alm-Kruse K, Tjelmeland I, Kongsgard H, Kvale R, Kramer-Johansen J (2021)
Case completeness in the Norwegian Cardiac Arrest Registry
Resusc. Plus, 8, 100182
DOI 10.1016/j.resplu.2021.100182

Berve PO, Irusta U, Kramer-Johansen J, Skalhegg T, Aramendi E, Wik L (2021)
Tidal volume measurements via transthoracic impedance waveform characteristics: The effect of age, body mass index and gender. A single centre interventional study
Resuscitation, 167, 218-224
DOI 10.1016/j.resuscitation.2021.08.041

Hardeland C, Claesson A, Blom MT, Blomberg SNF, Folke F, Hollenberg J, Kramer-Johansen J, Lippert F, Nord A, Nygaard AM, Olasveengen TM, Ringh M, Svensson L, Moller TP (2021)
Description of call handling in emergency medical dispatch centres in Scandinavia: recognition of out-of-hospital cardiac arrests and dispatcher-assisted CPR
Scand. J. Trauma Resusc. Emerg. Med., 29 (1), 88
DOI 10.1186/s13049-021-00903-4

Niles DE, Skare C, Foglia EE, Insley E, Cines C, Olasveengen T, Ballester LS, Ades A, Posencheg M, Nadkarni VM, Kramer-Johansen J (2021)
Effect of a positive pressure ventilation-refresher program on ventilation skill performance during simulated newborn resuscitation
Resusc. Plus, 5, 100091
DOI 10.1016/j.resplu.2021.100091

Tjelmeland IBM, Wnent J, Masterson S, Kramer-Johansen J, Grasner JT (2021)
Protocol for a cohort study of the impact of the COVID-19 pandemic on the rate and incidence of bystander cardiopulmonary resuscitation (CPR) after out-of-hospital cardiac arrest
Scand. J. Trauma Resusc. Emerg. Med., 29 (1), 82
DOI 10.1186/s13049-021-00890-6

Publications 2020

Bjorshol CA, Kramer-Johansen J (2020)
Survival and neurological outcome: Search for a low-hanging fruit
Resuscitation, 148, 269-270
DOI 10.1016/j.resuscitation.2020.01.012

Brede JR, Kramer-Johansen J, Rehn M (2020)
A needs assessment of resuscitative endovascular balloon occlusion of the aorta (REBOA) in non-traumatic out-of-hospital cardiac arrest in Norway
BMC Emerg. Med., 20 (1), 28
DOI 10.1186/s12873-020-00324-z

Eftestol T, Stokka SE, Kvaloy JT, Rad AB, Irusta U, Aramendi E, Alonso E, Nordseth T, Skogvoll E, Wik L, Kramer-Johansen J (2020)
A Probabilistic Function to Model the Relationship between Quality of Chest Compressions and the Physiological Response for Patients in Cardiac Arrest
COMPUT CARDIOL CONF, 73
DOI 10.22489/CinC.2020.073

Isasi I, Irusta U, Aramendi E, Eftestol T, Kramer-Johansen J, Wik L (2020)
Rhythm Analysis during Cardiopulmonary Resuscitation Using Convolutional Neural Networks
Entropy, 22 (6), 595
DOI 10.3390/e22060595

Lasa H, Irusta U, Eftestol T, Aramendi E, Rad AB, Kramer-Johansen J, Wik L (2020)
Multimodal Biosignal Analysis Algorithm for the Classification of Cardiac Rhythms During Resuscitation
COMPUT CARDIOL CONF, 347
DOI 10.22489/CinC.2020.347

Oving I, de Graaf C, Karlsson L, Jonsson M, Kramer-Johansen J, Berglund E, Hulleman M, Beesems SG, Koster RW, Olasveengen TM, Ringh M, Claessen A, Lippert F, Hollenberg J, Folke F, Tan HL, Blom MT (2020)
Occurrence of shockable rhythm in out-of-hospital cardiac arrest over time: A report from the COSTA group
Resuscitation, 151, 67-74
DOI 10.1016/j.resuscitation.2020.03.014

Tjelmeland IBM, Alm-Kruse K, Andersson LJ, Bratland S, Hafstad AK, Haug B, Langorgen J, Larsen AI, Lindner TW, Nilsen JE, Olasveengen TM, Soreide E, Skogvoll E, Kramer-Johansen J (2020)
Cardiac arrest as a reportable condition: a cohort study of the first 6 years of the Norwegian out-of-hospital cardiac arrest registry
BMJ Open, 10 (7), e038133
DOI 10.1136/bmjopen-2020-038133

Publications 2019

Andresen AEL, Kramer-Johansen J, Kristiansen T (2019)
Percutaneous vs surgical emergency cricothyroidotomy: An experimental randomized crossover study on an animal-larynx model
Acta Anaesthesiol. Scand., 63 (10), 1306-1312
DOI 10.1111/aas.13447

Berve PO, Irusta U, Kramer-Johansen J, Skalhegg T, Kongsgard HW, Brunborg C, Aramendi E, Wik L (2019)
Transthoracic Impedance Measured with Defibrillator PadsNew Interpretations of Signal Change Induced by Ventilations
J. Clin. Med., 8 (5), 724
DOI 10.3390/jcm8050724

Bjorshol CA, Jamtli B, Kramer-Johansen J, Myklebust H, Olsen S, Nordseth T, Mollekleiv S, Osmundsen SL, Nilsen JE, Lossius HM (2019)
Together we save lives
Tidsskr. Nor. Laegeforen., 139 (12), 1142-1144

Isasi I, Irusta U, Aramendi E, Ayala U, Alonso E, Kramer-Johansen J, Eftestol T (2019)
A Multistage Algorithm for ECG Rhythm Analysis During Piston-Driven Mechanical Chest Compressions
IEEE Trans. Biomed. Eng., 66 (1), 263-272
DOI 10.1109/TBME.2018.2827304

Isasi I, Irusta U, Elola A, Aramendi E, Ayala U, Alonso E, Kramer-Johansen J, Eftestol T (2019)
A Machine Learning Shock Decision Algorithm for Use During Piston-Driven Chest Compressions
IEEE Trans. Biomed. Eng., 66 (6), 1752-1760
DOI 10.1109/TBME.2018.2878910

Isasi I, Irusta U, Elola A, Aramendi E, Eftestol T, Kramer-Johansen J, Wik L (2019)
A Robust Machine Learning Architecture for a Reliable ECG Rhythm Analysis during CPR
IEEE ENG MED BIO, 1903-1907

Isasi I, Irusta U, Rad AB, Aramendi E, Zabihi M, Eftestol T, Kramer-Johansen J, Wik L (2019)
Automatic Cardiac Rhythm Classification With Concurrent Manual Chest Compressions
IEEE Access, 7, 115147-115159
DOI 10.1109/ACCESS.2019.2935096

Picon A, Irusta U, Alvarez-Gila A, Aramendi E, Alonso-Atienza F, Figuera C, Ayala U, Garrote E, Wik L, Kramer-Johansen J, Eftestol T (2019)
Mixed convolutional and long short-term memory network for the detection of lethal ventricular arrhythmia
PLoS One, 14 (5), e0216756
DOI 10.1371/journal.pone.0216756

Publications 2018

Isasi I, Irusta U, Aramendi E, Ayala U, Alonso E, Kramer-Johansen J, Eftestol T (2018)
An Accurate Shock Advise Algorithm for Use During Piston-Driven Chest Compressions
COMPUT CARDIOL CONF, 45
DOI 10.22489/CinC.2018.204

Isasi I, Rad AB, Irusta U, Zabihi M, Aramendi E, Eftestol T, Kramer-Johansen J, Wik L (2018)
ECG Rhythm Analysis During Manual Chest Compressions Using an Artefact Removal Filter and Random Forest Classifiers
COMPUT CARDIOL CONF, 45
DOI 10.22489/CinC.2018.202

Rad AB, Eftestol T, Irusta U, Kvaloy JT, Wik L, Kramer-Johansen J, Katsaggelos AK, Engan K (2018)
An automatic system for the comprehensive retrospective analysis of cardiac rhythms in resuscitation episodes
Resuscitation, 122, 6-12
DOI 10.1016/j.resuscitation.2017.11.035

Ringh M, Hollenberg J, Palsgaard-Moeller T, Svensson L, Rosenqvist M, Lippert FK, Wissenberg M, Hansen CM, Claesson A, Viereck S, Zijlstra JA, Koster RW, Herlitz J, Blom MT, Kramer-Johansen J, Tan HL, Beesems SG, Hulleman M, Olasveengen TM, Folke F, COSTA Study Grp (2018)
The challenges and possibilities of public access defibrillation
J. Intern. Med., 283 (3), 238-256
DOI 10.1111/joim.12730

Skare C, Boldingh AM, Kramer-Johansen J, Consch TE, Nakstad B, Nadkarni V, Olasveengen TM, Niles DE (2018)
Video performance-debriefings and ventilation-refreshers improve quality of neonatal resuscitation
Resuscitation, 132, 140-146
DOI 10.1016/j.resuscitation.2018.07.013

Skare C, Calisch TE, Saeter E, Rajka T, Boldingh AM, Nakstad B, Niles DE, Kramer-Johansen J, Olasveengen TM (2018)
Implementation and effectiveness of a video-based debriefing programme for neonatal resuscitation
Acta Anaesthesiol. Scand., 62 (3), 394-403
DOI 10.1111/aas.13050

Steinberg MT, Olsen JA, Eriksen M, Neset A, Norseng PA, Kramer-Johansen J, Hardig BM, Wik L (2018)
Haemodynamic outcomes during piston-based mechanical CPR with or without active decompression in a porcine model of cardiac arrest
Scand. J. Trauma Resusc. Emerg. Med., 26, 31
DOI 10.1186/s13049-018-0496-z

Zijlstra JA, Koster RW, Blom MT, Lippert FK, Svensson L, Herlitz J, Kramer-Johansen J, Ringh M, Rosenqvist M, Moller TP, Tan HL, Beesems SG, Hulleman M, Claesson A, Folke F, Olasveengen TM, Wissenberg M, Hansen CM, Viereck S, Hollenberg J, COSTA Study Grp (2018)
Different defibrillation strategies in survivors after out-of-hospital cardiac arrest
Heart, 104 (23), 1929-+
DOI 10.1136/heartjnl-2017-312622

Publications 2017

Hardeland C, Skare C, Kramer-Johansen J, Birkenes TS, Myklebust H, Hansen AE, Sunde K, Olasveengen TM (2017)
Targeted simulation and education to improve cardiac arrest recognition and telephone assisted CPR in an emergency medical communication centre
Resuscitation, 114, 21-26
DOI 10.1016/j.resuscitation.2017.02.013

Isasi I, Irusta U, Aramendi E, Ayala U, Alonso E, Kramer-Johansen J, Eftestol T (2017)
Removing Piston-driven Mechanical Chest Compression Artefacts from the ECG
COMPUT CARDIOL CONF, 44
DOI 10.22489/CinC.2017.009-115

Niles DE, Cines C, Insley E, Foglia EE, Elci OU, Skare C, Olasveengen T, Ades A, Posencheg M, Nadkarni VM, Kramer-Johansen J (2017)
Incidence and characteristics of positive pressure ventilation delivered to newborns in a US tertiary academic hospital
Resuscitation, 115, 102-109
DOI 10.1016/j.resuscitation.2017.03.035

Niles DE, Nishisaki A, Sutton RM, Elci OU, Meaney PA, O'Connor KA, Leffelman J, Kramer-Johansen J, Berg RA, Nadkarni V (2017)
Improved Retention of Chest Compression Psychomotor Skills With Brief "Rolling Refresher" Training
Simul. Healthc., 12 (4), 213-219
DOI 10.1097/SIH.0000000000000228

Rad AB, Eftestol T, Engan K, Irusta U, Kvaloy JT, Kramer-Johansen J, Wik L, Katsaggelos AK (2017)
ECG-Based Classification of Resuscitation Cardiac Rhythms for Retrospective Data Analysis
IEEE Trans. Biomed. Eng., 64 (10), 2411-2418
DOI 10.1109/TBME.2017.2688380

Publications 2016

Aramendi E, Irusta U, Ayala U, Naas H, Kramer-Johansen J, Eftestol T (2016)
Filtering mechanical chest compression artefacts from out-of-hospital cardiac arrest data
Resuscitation, 98, 41-47
DOI 10.1016/j.resuscitation.2015.10.012

Figuera C, Irusta U, Morgado E, Aramendi E, Ayala U, Wik L, Kramer-Johansen J, Eftestol T, Alonso-Atienza F (2016)
Machine Learning Techniques for the Detection of Shockable Rhythms in Automated External Defibrillators
PLoS One, 11 (7), e0159654
DOI 10.1371/journal.pone.0159654

Grusd E, Kramer-Johansen J (2016)
Does the Norwegian emergency medical dispatch classification as non-urgent predict no need for pre-hospital medical treatment? An observational study
Scand. J. Trauma Resusc. Emerg. Med., 24, 65
DOI 10.1186/s13049-016-0258-8

Nestaas S, Stensaeth KH, Rosseland V, Kramer-Johansen J (2016)
Radiological assessment of chest compression point and achievable compression depth in cardiac patients
Scand. J. Trauma Resusc. Emerg. Med., 24, 54
DOI 10.1186/s13049-016-0245-0

Rad AB, Engan K, Katsaggelos AK, Kvaloy JT, Wik L, Kramer-Johansen J, Irusta U, Eftestol T (2016)
Automatic cardiac rhythm interpretation during resuscitation
Resuscitation, 102, 44-50
DOI 10.1016/j.resuscitation.2016.01.015

Skare C, Boldingh AM, Nakstad B, Calisch TE, Niles DE, Nadkarni VM, Kramer-Johansen J, Olasveengen TM (2016)
Ventilation fraction during the first 30 s of neonatal resuscitation
Resuscitation, 107, 25-30
DOI 10.1016/j.resuscitation.2016.07.231

Publications 2015

Ayala U, Irusta U, Ruiz J, de Gauna SR, Gonzalez-Otero D, Alonso E, Kramer-Johansen J, Naas H, Eftestol T (2015)
Fully automatic rhythm analysis during chest compression pauses
Resuscitation, 89, 25-30
DOI 10.1016/j.resuscitation.2014.11.022

Birkenes TS, Myklebust H, Hardeland C, Kramer-Johansen J, Ong MEH, Shin SD, Panczyk M, Bobrow BJ (2015)
HOW to train for telephone-CPR
Trends Anaesth. Crit. Care, 5 (5), 124-129
DOI 10.1016/j.tacc.2015.07.003

Gonzalez-Otero DM, de Gauna SR, Ruiz J, Daya MR, Wik L, Russell JK, Kramer-Johansen J, Eftestol T, Alonso E, Ayala U (2015)
Chest compression rate feedback based on transthoracic impedance
Resuscitation, 93, 82-88
DOI 10.1016/j.resuscitation.2015.05.027

Gundersen K, Kvaloy JT, Eftestol T, Kramer-Johansen J (2015)
Modelling ventricular fibrillation coarseness during cardiopulmonary resuscitation by mixed effects stochastic differential equations
Stat. Med., 34 (23), 3159-3169
DOI 10.1002/sim.6539

Kramer-Johansen J (2015)
Peeking from the blindfold
Resuscitation, 96, A3-A4
DOI 10.1016/j.resuscitation.2015.07.012

Kramer-Johansen J, Olasveengen TM (2015)
The different faces of ventricular fibrillation
Resuscitation, 86, A3-A4
DOI 10.1016/j.resuscitation.2014.11.003

Olasveengen TM, Prescott RJ, Kramer-Johansen J (2015)
Impedance threshold device (ITD) during cardiac arrest - Does it work or not?
Resuscitation, 94, A3-A4
DOI 10.1016/j.resuscitation.2015.07.006

Skare C, Kramer-Johansen J, Steen T, Odegaard S, Niles DE, Nakstad B, Solevag AL, Nadkarni VM, Olasveengen TM (2015)
Incidence of Newborn Stabilization and Resuscitation Measures and Guideline Compliance during the First Minutes of Life in Norway
Neonatology, 108 (2), 100-107
DOI 10.1159/000431075

Publications 2014

Alonso E, Eftestol T, Aramendi E, Kramer-Johansen J, Skogvoll E, Nordseth T (2014)
Beyond ventricular fibrillation analysis: Comprehensive waveform analysis for all cardiac rhythms occurring during resuscitation
Resuscitation, 85 (11), 1541-1548
DOI 10.1016/j.resuscitation.2014.08.022

Ayala U, Eftestol T, Alonso E, Irusta U, Aramendi E, Wali S, Kramer-Johansen J (2014)
Automatic detection of chest compressions for the assessment of CPR-quality parameters
Resuscitation, 85 (7), 957-963
DOI 10.1016/j.resuscitation.2014.04.007

Ayala U, Irusta U, Ruiz J, Alonso-Atienza F, Alonso E, Gonzalez-Otero D, Kramer-Johansen J, Naas H, Eftestol T (2014)
Filtering Chest Compression Artifacts Improves the Performance of VF-detection Parameters
COMPUT CARDIOL CONF, 41, 1109-1112

Ayala U, Irusta U, Ruiz J, Eftestol T, Kramer-Johansen J, Alonso-Atienza F, Alonso E, Gonzalez-Otero D (2014)
A Reliable Method for Rhythm Analysis during Cardiopulmonary Resuscitation
Biomed Res. Int., 2014, 872470
DOI 10.1155/2014/872470

Birkenes TS, Myklebust H, Neset A, Kramer-Johansen J (2014)
Quality of CPR performed by trained bystanders with optimized pre-arrival instructions
Resuscitation, 85 (1), 124-130
DOI 10.1016/j.resuscitation.2013.09.015

Rad AB, Ejtestol T, Kvaloy JT, Ayala U, Kramer-Johansen J, Engan K (2014)
NEAREST-MANIFOLD CLASSIFICATION APPROACH FOR CARDIAC ARREST RHYTHM INTERPRETATION DURING RESUSCITATION
INT CONF ACOUST SPEE

Publications 2013

Ayala U, Irusta U, Ruiz J, Gonzalez-Otero D, Alonso E, Kramer-Johansen J, Eftestol T (2013)
A New Algorithm to Diagnose during Chest Compressions: Effect on Cardiopulmonary Resuscitation Delivery
COMPUT CARDIOL CONF, 40, 129-132

Birkenes TS, Myklebust H, Kramer-Johansen J (2013)
Time delays and capability of elderly to activate speaker function for continuous telephone CPR
Scand. J. Trauma Resusc. Emerg. Med., 21, 40
DOI 10.1186/1757-7241-21-40

Birkenes TS, Myklebust H, Kramer-Johansen J (2013)
New pre-arrival instructions can avoid abdominal hand placement for chest compressions
Scand. J. Trauma Resusc. Emerg. Med., 21, 47
DOI 10.1186/1757-7241-21-47

Gonzalez-Otero D, Alonso E, Ruiz J, Aramendi E, de Gauna SR, Ayala U, Kramer-Johansen J, Eftestol T (2013)
A Simple Impedance-Based Method for Ventilation Detection During Cardiopulmonary Resuscitation
COMPUT CARDIOL CONF, 40, 807-810

Neset A, Birkenes TS, Kramer-Johansen J (2013)
CPR PERFORMANCE - FAILURE PROVED?
J. Emerg. Med., 44 (5), 990-991
DOI 10.1016/j.jemermed.2011.07.043

Neset A, Nordseth T, Kramer-Johansen J, Wik L, Olasveengen TM (2013)
Effects of adrenaline on rhythm transitions in out-of-hospital cardiac arrest
Acta Anaesthesiol. Scand., 57 (10), 1260-1267
DOI 10.1111/aas.12184

Qvigstad E, Kramer-Johansen J, Tomte O, Skalhegg T, Sorensen O, Sunde K, Olasveengen TM (2013)
Clinical pilot study of different hand positions during manual chest compressions monitored with capnography
Resuscitation, 84 (9), 1203-1207
DOI 10.1016/j.resuscitation.2013.03.010

Rad AB, Eftestol T, Kvaloy JT, Ayala U, Kramer-Johansen J, Engan K (2013)
Probabilistic Classification Approaches for Cardiac Arrest Rhythm Interpretation during Resuscitation
COMPUT CARDIOL CONF, 40, 125-128

Ruiz J, Alonso E, Aramendi E, Kramer-Johansen J, Eftestol T, Ayala U, Gonzalez-Otero D (2013)
Reliable extraction of the circulation component in the thoracic impedance measured by defibrillation pads
Resuscitation, 84 (10), 1345-1352
DOI 10.1016/j.resuscitation.2013.05.020

Ruiz J, Ayala U, de Gauna SR, Irusta U, Gonzalez-Otero D, Alonso E, Kramer-Johansen J, Eftestol T (2013)
Feasibility of automated rhythm assessment in chest compression pauses during cardiopulmonary resuscitation
Resuscitation, 84 (9), 1223-1228
DOI 10.1016/j.resuscitation.2013.01.034

Skogvoll E, Kramer-Johansen J (2013)
Publication of clinical trial protocols - what can we learn?
Scand. J. Trauma Resusc. Emerg. Med., 21, 12
DOI 10.1186/1757-7241-21-12

Publications 2012

Aramendi E, Ayala U, Irusta U, Alonso E, Eftestol T, Kramer-Johansen J (2012)
Suppression of the cardiopulmonary resuscitation artefacts using the instantaneous chest compression rate extracted from the thoracic impedance
Resuscitation, 83 (6), 692-698
DOI 10.1016/j.resuscitation.2011.11.029

Birkenes TS, Myklebust H, Neset A, Olasveengen TM, Kramer-Johansen J (2012)
Video analysis of dispatcher-rescuer teamwork-Effects on CPR technique and performance
Resuscitation, 83 (4), 494-499
DOI 10.1016/j.resuscitation.2011.09.021

Neset A, Birkenes TS, Furunes T, Myklebust H, Mykletun RJ, Odegaard S, Olasveengen TM, Kramer-Johansen J (2012)
A randomized trial on elderly laypersons' CPR performance in a realistic cardiac arrest simulation
Acta Anaesthesiol. Scand., 56 (1), 124-131
DOI 10.1111/j.1399-6576.2011.02566.x

Publications 2011

Kramer-Johansen J (2011)
CARDIOPULMONARY RESUSCITATION OR SHOCK FIRST-NO ANSWERS YET?
Prehosp. Emerg. Care, 15 (4), 577-578
DOI 10.3109/10903127.2011.608873

Kramer-Johansen J, Pytte M, Tomlinson AE, Sunde K, Dorph E, Svendsen JVH, Eriksen M, Stromme TA, Wik L (2011)
Mechanical chest compressions with trapezoidal waveform improve haemodynamics during cardiac arrest
Resuscitation, 82 (2), 213-218
DOI 10.1016/j.resuscitation.2010.10.009

Publications 2010

Neset A, Birkenes TS, Myklebust H, Mykletun RJ, Odegaard S, Kramer-Johansen J (2010)
A randomized trial of the capability of elderly lay persons to perform chest compression only CPR versus standard 30:2 CPR
Resuscitation, 81 (7), 887-892
DOI 10.1016/j.resuscitation.2010.03.028

Publications 2009

Gundersen K, Kvaloy JT, Kramer-Johansen J, Steen PA, Eftestol T (2009)
Development of the probability of return of spontaneous circulation in intervals without chest compressions during out-of-hospital cardiac arrest: an observational study
BMC Med., 7, 6
DOI 10.1186/1741-7015-7-6

Gundersen K, Nysaether J, Kvaloy JT, Kramer-Johansen J, Eftestol T (2009)
Chest compression quality variables influencing the temporal development of ROSC-predictors calculated from the ECG during VF
Resuscitation, 80 (2), 177-182
DOI 10.1016/j.resuscitation.2008.09.011

Irusta U, Ruiz J, de Gauna SR, Eftestol T, Kramer-Johansen J (2009)
A Least Mean-Square Filter for the Estimation of the Cardiopulmonary Resuscitation Artifact Based on the Frequency of the Compressions
IEEE Trans. Biomed. Eng., 56 (4), 1052-1062
DOI 10.1109/TBME.2008.2010329

Kvaloy JT, Skogvoll E, Eftestol T, Gundersen K, Kramer-Johansen J, Olasveengen TM, Steen PA (2009)
Which factors influence spontaneous state transitions during resuscitation?
Resuscitation, 80 (8), 863-869
DOI 10.1016/j.resuscitation.2009.04.042

Neurcauter A, Nysaether J, Kramer-Johansen J, Eilevstjonn J, Paal P, Myklebust H, Wenzel V, Lindner KH, Schmolz W, Pytte M, Steen PA, Strohmenger HU (2009)
Comparison of mechanical characteristics of the human and porcine chest during cardiopulmonary resuscitation
Resuscitation, 80 (4), 463-469
DOI 10.1016/j.resuscitation.2008.12.014

Odegaard S, Olasveengen T, Steen PA, Kramer-Johansen J (2009)
The effect of transport on quality of cardiopulmonary resuscitation in out-of-hospital cardiac arrest
Resuscitation, 80 (8), 843-848
DOI 10.1016/j.resuscitation.2009.03.032

Publications 2008

de Gauna SR, Ruiz J, Irusta U, Aramendi E, Eftestol T, Kramer-Johansen J (2008)
A method to remove CPR artefacts from human ECG using only the recorded ECG
Resuscitation, 76 (2), 271-278
DOI 10.1016/j.resuscitation.2007.08.002

Gundersen K, Kvaloy JT, Kramer-Johansen J, Eftestol T (2008)
Identifying approaches to improve the accuracy of shock outcome prediction for out-of-hospital cardiac arrest
Resuscitation, 76 (2), 279-284
DOI 10.1016/j.resuscitation.2007.07.019

Gundersen K, Kvaloy JT, Kramer-Johansen J, Olasveengen TM, Eilevstjonn J, Eftestol T (2008)
Using within-patient correlation to improve the accuracy of shock outcome prediction for cardiac arrest
Resuscitation, 78 (1), 46-51
DOI 10.1016/j.resuscitation.2008.02.018

Kramer-Johansen J, Dorph E, Steen PA (2008)
Detection of carbon dioxide in expired air after oesophageal intubation; the role of bystander mouth-to-mouth ventilation
Acta Anaesthesiol. Scand., 52 (1), 155-157
DOI 10.1111/j.1399-6576.2007.01503.x

Kramer-Johansen J, Eilevstjonn J, Olasveengen TM, Tomlinson AE, Dorph E, Steen PA (2008)
Transthoracic impedance changes as a tool to detect malpositioned tracheat tubes
Resuscitation, 76 (1), 11-16
DOI 10.1016/j.resuscitation.2007.07.021

Neurauter A, Eftestol T, Kramer-Johansen J, Abella BS, Wenzel V, Lindner KH, Eilevstjonn J, Myklebust H, Steen PA, Sterz F, Jahn B, Strohmenger HU (2008)
Improving countershock success prediction during cardiopulmonary resuscitation using ventricular fibrillation features from higher ECG frequency bands
Resuscitation, 79 (3), 453-459
DOI 10.1016/j.resuscitation.2008.07.024

Odegaard S, Pillgram M, Berg NEV, Olasveengen T, Kramer-Johansen J (2008)
Time used for ventilation in two-rescuer CPR with a bag-valve-mask device during out-of-hospital cardiac arrest
Resuscitation, 77 (1), 57-62
DOI 10.1016/j.resuscitation.2007.11.005

Pytte M, Bendz B, Kramer-Johansen J, Eriksen M, Stromme TA, Eilevstjonn J, Brosstad F, Sunde K (2008)
Prearrest administration of low-molecular-weight heparin in porcine cardiac arrest: Hemodynamic effects and resuscitability
Crit. Care Med., 36 (3), 881-886
DOI 10.1097/CCM.0B013E318164E781

Pytte M, Dorph E, Sunde K, Kramer-Johansen J, Wik L, Steen PA (2008)
Arterial blood gases during basic life support of human cardiac arrest victims
Resuscitation, 77 (1), 35-38
DOI 10.1016/j.resuscitation.2007.10.005

Risdal M, Aase SO, Kramer-Johansen J, Eftestol T (2008)
Automatic identification of return of spontaneous circulation during cardiopulmonary resuscitation
IEEE Trans. Biomed. Eng., 55 (1), 60-68
DOI 10.1109/TBME.2007.910644

Skogvoll E, Eftestol T, Gundersen K, Kvaloy JT, Kramer-Johansen J, Olasveengen TM, Steen PA (2008)
Dynamics and state transitions during resuscitation in out-of-hospital cardiac arrest
Resuscitation, 78 (1), 30-37
DOI 10.1016/j.resuscitation.2008.02.015

Steen PA, Kramer-Johansen J (2008)
Improving cardiopulmonary resuscitation quality to ensure survival
Curr. Opin. Crit. Care, 14 (3), 299-304
DOI 10.1097/MCC.0b013e3282f827d3

Publications 2007

Asveengen TM, Wik L, Kramer-Johansen J, Sunde K, Pytte M, Steen PA (2007)
Is CPR quality improving? A retrospective study of out-of-hospital cardiac arrest
Resuscitation, 75 (2), 260-266
DOI 10.1016/j.resuscitation.2007.04.016

Eilevstjonn J, Kramer-Johansen J, Sunde K (2007)
Shock outcome is related to prior rhythm and duration of ventricular fibrillation
Resuscitation, 75 (1), 60-67
DOI 10.1016/j.resuscitation.2007.02.014

Kramer-Johansen J (2007)
Reporting and improving quality of cardiopulmonary resuscitation (CPR) during out of hospital cardiac arrest
In Series of dissertations submitted to the Faculty of Medicine, University of Oslo, Unipub, Oslo, no. 518, 1 b. (flere pag.)
BIBSYS 070871396, ISBN 978-82-8072-865-4

Kramer-Johansen J, Edelson DP, Abella BS, Becker LB, Wik L, Steen PA (2007)
Pauses in chest compression and inappropriate shocks: A comparison of manual and semi-automatic defibrillation attempts
Resuscitation, 73 (2), 212-220
DOI 10.1016/j.resuscitation.2006.09.006

Kramer-Johansen J, Edelson DP, Losert H, Koehler K, Abella BS (2007)
Uniform reporting of measured quality of cardiopulmonary resuscitation (CPR)
Resuscitation, 74 (3), 406-417
DOI 10.1016/j.resuscitation.2007.01.024

Neurauter A, Eftestol T, Kramer-Johansen J, Abella BS, Sunde K, Wenzel V, Lindner KH, Eilevstjonn J, Mykebust H, Steen PA, Strohmenger HU (2007)
Prediction of countershock success using single features from multiple ventricular fibrillation frequency bands and feature combinations using neural networks
Resuscitation, 73 (2), 253-263
DOI 10.1016/j.resuscitation.2006.10.002

Neurauter A, Kramer-Johansen J, Eilevstjonn J, Myklebust H, Wenzel V, Lindner KH, Eftestol T, Steen PA, Strohmenger HU (2007)
Estimation of the duration of ventricular fibrillation using ECG single feature analysis
Resuscitation, 73 (2), 246-252
DOI 10.1016/j.resuscitation.2006.08.028

Odegaard S, Kramer-Johansen J, Bromley A, Myklebust H, Nysaether J, Wik L, Steen PA (2007)
Chest compressions by ambulance personnel on chests with variable stiffness: Abilities and attitudes
Resuscitation, 74 (1), 127-134
DOI 10.1016/j.resuscitation.2006.12.006

Olasveengen TM, Tomlinson AE, Wik L, Sunde K, Steen PA, Myklebust H, Kramer-Johansen J (2007)
A failed attempt to improve quality of out-of-hospital CPR through performance evaluation
Prehosp. Emerg. Care, 11 (4), 427-433
DOI 10.1080/10903120701536628

Sunde K, Kramer-Johansen J, Pytte M, Steen PA (2007)
Predicting survival with good neurologic recovery at hospital admission after successful resuscitation of out-of-hospital cardiac arrest: the OHCA score
Eur. Heart J., 28 (6), 773
DOI 10.1093/eurheartj/ehl536

Tomlinson AE, Nysaether J, Kramer-Johansen J, Steen PA, Dorph E (2007)
Compression force-depth relationship during out-of-hospital cardiopulmonary resuscitation
Resuscitation, 72 (3), 364-370
DOI 10.1016/j.resuscitation.2006.07.017

Publications 2006

Edelson DP, Abella BS, Kramer-Johansen J, Wik L, Myklebust H, Barry AM, Merchant RM, Hoek TL, Steen PA, Becker LB (2006)
Effects of compression depth and pre-shock pauses predict defibrillation failure during cardiac arrest
Resuscitation, 71 (2), 137-145
DOI 10.1016/j.resuscitation.2006.04.008

Eftestol T, Skogvoll E, Gundersen K, Kvaloy JT, Kramer-Johansen J, Steen PA (2006)
Information structuring and symbolic representation for analysis of resuscitation data
2006 7TH NORDIC SIGNAL PROCESSING SYMPOSIUM, 42-+

Kramer-Johansen J, Myklebust H, Wik L, Fellows B, Svensson L, Sorebo H, Steen PA (2006)
Quality of out-of-hospital cardiopulmonary resuscitation with real time automated feedback: A prospective interventional study
Resuscitation, 71 (3), 283-292
DOI 10.1016/j.resuscitation.2006.05.011

Kramer-Johansen J, Sunde K, Pytte M, Wik L, Steen PA (2006)
Reconfirmation algorithms should be the standard of care in automated external defibrillators
Resuscitation, 70 (3), 474-475
DOI 10.1016/j.resuscitation.2006.04.010

Kramer-Johansen J, Wik L, Steen PA (2006)
Advanced cardiac life support before and after tracheal intubation - direct measurements of quality
Resuscitation, 68 (1), 61-69
DOI 10.1016/j.resuscitation.2005.05.020

Pytte M, Kramer-Johansen J, Eilevstjonn J, Eriksen M, Stromme TA, Godang K, Wik L, Steen PA, Sunde K (2006)
Haemodynamic effects of adrenaline (epinephrine) depend on chest compression quality during cardiopulmonary resuscitation in pigs
Resuscitation, 71 (3), 369-378
DOI 10.1016/j.resuscitation.2006.05.003

Publications 2005

Eftestol T, Losert H, Kramer-Johansen J, Wik L, Sterz F, Steen PA (2005)
Independent evaluation of a defibrillation outcome predictor for out-of-hospital cardiac arrested patients
Resuscitation, 67 (1), 55-61
DOI 10.1016/j.resuscitation.2005.05.006

Eilevstjonn J, Kramer-Johansen J, Eftestol T, Stavland M, Myklebust H, Steen PA (2005)
Reducing no flow times during automated external defibrillation
Resuscitation, 67 (1), 95-101
DOI 10.1016/j.resuscitation.2005.04.009

Kramer-Johansen J, Sunde K, Steen PA (2005)
Predicting outcome after cardiac arrest: Two caveats
Resuscitation, 66 (1), 108-109
DOI 10.1016/j.resuscitation.2004.12.028

Wik L, Kramer-Johansen J, Myklebust H, Sorebo H, Svensson L, Fellows B, Steen PA (2005)
Quality of cardiopulmonary resuscitation during out-of-hospital cardiac arrest
JAMA-J. Am. Med. Assoc., 293 (3), 299-304
DOI 10.1001/jama.293.3.299