Publications 2025

Tjelmeland IBM, Alm-Kruse K, Andersson LJ, Larsen AI, Lindner TW, Olasveengen T, Kramer-Johansen J (2025)
Patient cohorts of interest in resuscitation science - Aligning cardiac arrest registry outputs with stakeholder needs
Resuscitation, 210, 110509
DOI 10.1016/j.resuscitation.2025.110509, PubMed 39848425

Publications 2024

Alm-Kruse K, Gjerset GM, Tjelmeland IBM, Isern CB, Kramer-Johansen J, Garratt AM (2024)
How do survivors after out-of-hospital cardiac arrest perceive their health compared to the norm population? A nationwide registry study from Norway
Resusc Plus, 17, 100549
DOI 10.1016/j.resplu.2023.100549, PubMed 38292469

Bray JE, Grasner JT, Nolan JP, Iwami T, Ong MEH, Finn J, McNally B, Nehme Z, Sasson C, Tijssen J, Lim SL, Tjelmeland I, Wnent J, Dicker B, Nishiyama C, Doherty Z, Welsford M, Perkins GD, International Liaison Committee on Resuscitation (2024)
Cardiac Arrest and Cardiopulmonary Resuscitation Outcome Reports: 2024 Update of the Utstein Out-of-Hospital Cardiac Arrest Registry Template
Circulation, 150 (9), e203-e223
DOI 10.1161/CIR.0000000000001243, PubMed 39045706

Burger M, Ristau P, Bohn A, Fischer M, Tjelmeland IBM, Seewald S, Gräsner JT, Wnent J (2024)
Air temperature and humidity impact out-of-hospital-cardiac-arrests in Germany: A 10-year cohort study from the German Resuscitation Registry
Resusc Plus, 20, 100750
DOI 10.1016/j.resplu.2024.100750, PubMed 39268513

Grasner JT, Bray JE, Nolan JP, Iwami T, Ong MEH, Finn J, McNally B, Nehme Z, Sasson C, Tijssen J, Lim SL, Tjelmeland I, Wnent J, Dicker B, Nishiyama C, Doherty Z, Welsford M, Perkins GD, International Liaison Committee on Resuscitation (2024)
Cardiac arrest and cardiopulmonary resuscitation outcome reports: 2024 update of the Utstein Out-of-Hospital Cardiac Arrest Registry template
Resuscitation, 201, 110288
DOI 10.1016/j.resuscitation.2024.110288, PubMed 39045606

Kelpanides IK, Katzenschlager S, Skogvoll E, Tjelmeland IBM, Grindheim G, Alm-Kruse K, Liberg JP, Kristiansen T, Wnent J, Gräsner JT, Kramer-Johansen J (2024)
Out-of-hospital cardiac arrest in children in Norway: A national cohort study, 2016-2021
Resusc Plus, 18, 100662
DOI 10.1016/j.resplu.2024.100662, PubMed 38799717

Maurer H, Masterson S, Tjelmeland IBM, Strömsöe A, Ortiz FR, Gräsner JT, Wnent J (2024)
EuReCa - The European Registry of Cardiac Arrest and the related studies
Resusc Plus, 19, 100666
DOI 10.1016/j.resplu.2024.100666, PubMed 38827274

Siddiqui FJ, McNally B, Gräsner JT, Ho AFW, Tjelmeland I, Iwami T, Bray J, Wnent J, Lynn Lim S, Pin Pek P, Do Shin S, Ong MEH, GOHCAR Group (2024)
Towards advancing Out-of-Hospital cardiac arrest (OHCA) registries globally: Considerations from the global OHCA registry (GOHCAR) collaborative
Resusc Plus, 18, 100615
DOI 10.1016/j.resplu.2024.100615, PubMed 38549697

Publications 2023

Alm-Kruse K, Tjelmeland I, Reiner A, Kvåle R, Kramer-Johansen J (2023)
Use of healthcare services before and after out-of-hospital cardiac arrest
Resuscitation, 187, 109805
DOI 10.1016/j.resuscitation.2023.109805, PubMed 37088268

Harring AKV, Kramer-Johansen J, Tjelmeland IBM (2023)
Resuscitation of older adults in Norway; a comparison of survival and outcome after out-of-hospital cardiac arrest in healthcare institutions and at home
Resuscitation, 189, 109871
DOI 10.1016/j.resuscitation.2023.109871, PubMed 37327851

Isern CB, Kramer-Johansen J, Tjelmeland I, Bahr R, Berge HM (2023)
A 3-year population-based study of exercise-related sudden cardiac arrest among 12- to 50-year-old Norwegians
Scand J Med Sci Sports, 33 (8), 1560-1569
DOI 10.1111/sms.14400, PubMed 37226411

Isern CB, Nilsson BB, Garratt A, Kramer-Johansen J, Tjelmeland IBM, Berge HM (2023)
Health-related quality of life in young Norwegian survivors of out-of-hospital cardiac arrest related to pre-arrest exercise habits
Resusc Plus, 16, 100478
DOI 10.1016/j.resplu.2023.100478, PubMed 37818171

Katzenschlager S, Kelpanides IK, Ristau P, Huck M, Seewald S, Brenner S, Hoffmann F, Wnent J, Kramer-Johansen J, Tjelmeland IBM, Weigand MA, Gräsner JT, Popp E (2023)
Out-of-hospital cardiac arrest in children: an epidemiological study based on the German Resuscitation Registry identifying modifiable factors for return of spontaneous circulation
Crit Care, 27 (1), 349
DOI 10.1186/s13054-023-04630-3, PubMed 37679812

Katzenschlager S, Kelpanides IK, Skogvoll E, Grindheim G, Wnent J, Popp E, Weigand MA, Kramer-Johansen J, Tjelmeland IBM, Gräsner JT (2023)
Paediatric out-of-hospital cardiac arrest: Time to update registries?
Crit Care, 27 (1), 304
DOI 10.1186/s13054-023-04582-8, PubMed 37533130

Kjærvoll HK, Andersson LJ, Bakkelund KEN, Harring AKV, Tjelmeland IBM (2023)
Description of the prehospital emergency healthcare system in Norway
Resusc Plus, 17, 100509
DOI 10.1016/j.resplu.2023.100509, PubMed 38076383

Masterson S, Tjelmeland IBM (2023)
The European Resuscitation Council Cardiac Arrest Dashboard Service - Visualising out-of-hospital cardiac arrest data across Europe
Resusc Plus, 17, 100520
DOI 10.1016/j.resplu.2023.100520, PubMed 38162990

Nishiyama C, Kiguchi T, Okubo M, Alihodžić H, Al-Araji R, Baldi E, Beganton F, Booth S, Bray J, Christensen E, Cresta R, Finn J, Gräsner JT, Jouven X, Kern KB, Maconochie I, Masterson S, McNally B, Nolan JP, Eng Hock Ong M, Perkins GD, Ho Park J, Ristau P, Savastano S, Shahidah N et al. (2023)
Three-year trends in out-of-hospital cardiac arrest across the world: Second report from the International Liaison Committee on Resuscitation (ILCOR)
Resuscitation, 186, 109757
DOI 10.1016/j.resuscitation.2023.109757, PubMed 36868553

Tjelmeland IBM, Wnent J, Masterson S, Kramer-Johansen J, Ong MEH, Smith K, Skogvoll E, Lefering R, Lim SL, Liu N, Dicker B, Swain A, Ball S, Gräsner JT, CARES Surveillance Group and the Lockdown and bystander CPR group (2023)
Did lockdown influence bystanders' willingness to perform cardiopulmonary resuscitation? A worldwide registry-based perspective
Resuscitation, 186, 109764
DOI 10.1016/j.resuscitation.2023.109764, PubMed 36934834

Publications 2022

Seewald S, Wnent J, Gräsner JT, Tjelmeland I, Fischer M, Bohn A, Bouillon B, Maurer H, Lefering R (2022)
Survival after traumatic cardiac arrest is possible-a comparison of German patient-registries
BMC Emerg Med, 22 (1), 158
DOI 10.1186/s12873-022-00714-5, PubMed 36085024

Tjelmeland IBM, Alm-Kruse K, Grasner JT, Isern CB, Jakisch B, Kramer-Johansen J, Renzing N, Wnent J, Seewald S (2022)
Importance of reporting survival as incidence: a cross-sectional comparative study on out-of-hospital cardiac arrest registry data from Germany and Norway
BMJ Open, 12 (2), e058381
DOI 10.1136/bmjopen-2021-058381, PubMed 35177465

Wnent J, Masterson S, Maurer H, Tjelmeland I, Herlitz J, Rosell Ortiz F, Kurbach E, Bossaert L, Perkins G, Gräsner JT (2022)
European Registry of Cardiac Arrest - Study-THREE (EuReCa THREE) - An international, prospective, multi-centre, three-month survey of epidemiology, treatment and outcome of patients with out-of-hospital cardiac arrest in Europe - The study protocol
Resusc Plus, 12, 100314
DOI 10.1016/j.resplu.2022.100314, PubMed 36238583

Publications 2021

Alm-Kruse K, Tjelmeland I, Kongsgård H, Kvåle R, Kramer-Johansen J (2021)
Case completeness in the Norwegian Cardiac Arrest Registry
Resusc Plus, 8, 100182
DOI 10.1016/j.resplu.2021.100182, PubMed 34825238

Baldi E, Grieco NB, Ristagno G, Alihodžić H, Canon V, Birkun A, Cresta R, Cimpoesu D, Clarens C, Ganter J, Markota A, Mols P, Nikolaidou O, Quinn M, Raffay V, Ortiz FR, Salo A, Stieglis R, Strömsöe A, Tjelmeland I, Trenkler S, Wnent J, Grasner JT, Böttiger BW, Savastano S (2021)
The Automated External Defibrillator: Heterogeneity of Legislation, Mapping and Use across Europe. New Insights from the ENSURE Study
J Clin Med, 10 (21)
DOI 10.3390/jcm10215018, PubMed 34768537

Grasner JT, Herlitz J, Tjelmeland IBM, Wnent J, Masterson S, Lilja G, Bein B, Bottiger BW, Rosell-Ortiz F, Nolan JP, Bossaert L, Perkins GD (2021)
Epidemiology of cardiac arrest in Europe European Resuscitation Council Guidelines 2021
Notfall Rettungsmed., 24 (4), 346-366
DOI 10.1007/s10049-021-00884-y

Gräsner JT, Herlitz J, Tjelmeland IBM, Wnent J, Masterson S, Lilja G, Bein B, Böttiger BW, Rosell-Ortiz F, Nolan JP, Bossaert L, Perkins GD (2021)
European Resuscitation Council Guidelines 2021: Epidemiology of cardiac arrest in Europe
Resuscitation, 161, 61-79
DOI 10.1016/j.resuscitation.2021.02.007, PubMed 33773833

Tjelmeland IBM, Wnent J, Masterson S, Kramer-Johansen J, Gräsner 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, PubMed 34154630

Wnent J, Tjelmeland I, Lefering R, Koster RW, Maurer H, Masterson S, Herlitz J, Böttiger BW, Ortiz FR, Perkins GD, Bossaert L, Moertl M, Mols P, Hadžibegović I, Truhlář A, Salo A, Baert V, Nagy E, Cebula G, Raffay V, Trenkler S, Markota A, Strömsöe A, Gräsner JT, national coordinators of EuReCa TWO and local contributors (2021)
To ventilate or not to ventilate during bystander CPR - A EuReCa TWO analysis
Resuscitation, 166, 101-109
DOI 10.1016/j.resuscitation.2021.06.006, PubMed 34146622

Publications 2020

Gräsner JT, Tjelmeland I, Wnent J (2020)
Cardiac arrest registries: the need for a clear and strategic plan and concept
Kardiol Pol, 78 (5), 379-380
DOI 10.33963/KP.15380, PubMed 32458663

Gräsner JT, Wnent J, Herlitz J, Perkins GD, Lefering R, Tjelmeland I, Koster RW, Masterson S, Rossell-Ortiz F, Maurer H, Böttiger BW, Moertl M, Mols P, Alihodžić H, Hadžibegović I, Ioannides M, Truhlář A, Wissenberg M, Salo A, Escutnaire J, Nikolaou N, Nagy E, Jonsson BS, Wright P, Semeraro F et al. (2020)
Survival after out-of-hospital cardiac arrest in Europe - Results of the EuReCa TWO study
Resuscitation, 148, 218-226
DOI 10.1016/j.resuscitation.2019.12.042, PubMed 32027980

Kiguchi T, Okubo M, Nishiyama C, Maconochie I, Ong MEH, Kern KB, Wyckoff MH, McNally B, Christensen EF, Tjelmeland I, Herlitz J, Perkins GD, Booth S, Finn J, Shahidah N, Shin SD, Bobrow BJ, Morrison LJ, Salo A, Baldi E, Burkart R, Lin CH, Jouven X, Soar J, Nolan JP et al. (2020)
Out-of-hospital cardiac arrest across the World: First report from the International Liaison Committee on Resuscitation (ILCOR)
Resuscitation, 152, 39-49
DOI 10.1016/j.resuscitation.2020.02.044, PubMed 32272235

Tjelmeland IBM, Alm-Kruse K, Andersson LJ, Bratland S, Hafstad AK, Haug B, Langørgen 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, PubMed 32641339

Tjelmeland IBM, Masterson S, Herlitz J, Wnent J, Bossaert L, Rosell-Ortiz F, Alm-Kruse K, Bein B, Lilja G, Gräsner JT, GL2020 Epidemiology group and participating countries (2020)
Description of Emergency Medical Services, treatment of cardiac arrest patients and cardiac arrest registries in Europe
Scand J Trauma Resusc Emerg Med, 28 (1), 103
DOI 10.1186/s13049-020-00798-7, PubMed 33076942

Publications 2019

Oving I, Masterson S, Tjelmeland IBM, Jonsson M, Semeraro F, Ringh M, Truhlar A, Cimpoesu D, Folke F, Beesems SG, Koster RW, Tan HL, Blom MT, ESCAPE-NET Investigators (2019)
First-response treatment after out-of-hospital cardiac arrest: a survey of current practices across 29 countries in Europe
Scand J Trauma Resusc Emerg Med, 27 (1), 112
DOI 10.1186/s13049-019-0689-0, PubMed 31842928

Publications 2018

Maurer H, Masterson S, Tjelmeland IB, Gräsner JT, Lefering R, Böttiger BW, Bossaert L, Herlitz J, Koster RW, Rosell-Ortiz F, Perkins GD, Wnent J, EuReCa national coordinators (2018)
When is a bystander not a bystander any more? A European survey
Resuscitation, 136, 78-84
DOI 10.1016/j.resuscitation.2018.12.009, PubMed 30572073

Publications 2017

Wnent J, Masterson S, Grasner JT, Bottiger BW, Eggeling J, Herlitz J, Koster RW, Lefering R, Maurer H, Ortiz FR, Perkins GD, Tjelmeland I, Bossaert L (2017)
EuReCa TWO - A prospective observational analysis over three month in 29 cardiac arrest and resuscitation registries in 29 European countries - The EuReCa TWO study protocol
Anasthesiol. Intensivmed., 58, 506-511
DOI 10.19224/ai2017.506

Publications 2016

Gräsner JT, Lefering R, Koster RW, Masterson S, Böttiger BW, Herlitz J, Wnent J, Tjelmeland IB, Ortiz FR, Maurer H, Baubin M, Mols P, Hadžibegović I, Ioannides M, Škulec R, Wissenberg M, Salo A, Hubert H, Nikolaou NI, Lóczi G, Svavarsdóttir H, Semeraro F, Wright PJ, Clarens C, Pijls R et al. (2016)
EuReCa ONE-27 Nations, ONE Europe, ONE Registry: A prospective one month analysis of out-of-hospital cardiac arrest outcomes in 27 countries in Europe
Resuscitation, 105, 188-95
DOI 10.1016/j.resuscitation.2016.06.004, PubMed 27321577

Gräsner JT, Lefering R, Koster RW, Masterson S, Böttiger BW, Herlitz J, Wnent J, Tjelmeland IB, Ortiz FR, Maurer H, Baubin M, Mols P, Hadžibegovíc I, Ioannides M, Škulec R, Wissenberg M, Salo A, Hubert H, Nikolaou NI, Lóczi G, Svavarsdóttir H, Semeraro F, Wright PJ, Clarens C, Pijls R et al. (2016)
Corrigendum to "EuReCa ONE-27 Nations, ONE Europe, ONE Registry A prospective one month analysis of out-of-hospital cardiac arrest outcomes in 27 countries in Europe" [Resuscitation 105 (2016) 188-195]
Resuscitation, 109, 145-146
DOI 10.1016/j.resuscitation.2016.10.001, PubMed 27750053

Publications 2015

Wnent J, Masterson S, Gräsner JT, Böttiger BW, Herlitz J, Koster RW, Rosell Ortiz F, Tjelmeland I, Maurer H, Bossaert L (2015)
EuReCa ONE - 27 Nations, ONE Europe, ONE Registry: a prospective observational analysis over one month in 27 resuscitation registries in Europe - the EuReCa ONE study protocol
Scand J Trauma Resusc Emerg Med, 23, 7
DOI 10.1186/s13049-015-0093-3, PubMed 25927980