Clinical trial Recruiting at 2 sites Interventional Ages 18 and up

Comparing two CPR methods for out-of-hospital cardiac arrest

Official title: A Randomized Trial Comparing Survival After of a Simplified Form of Cardiopulmonary Resuscitation (CPR) Consisting of Compressions Only Compared to CPR With Compressions and Rescue Breaths

Run by Karolinska Institutet · NCT03981107 · Data updated 2026-11-12

This study is testing whether Chest Compression Only CPR is just as effective as Standard CPR for helping people who have a cardiac arrest outside of the hospital.

More Cardiac Arrest trials

Quick facts

Study typeInterventional
Ages18 Years and up
SexAll
Enrollment3260 (estimated)
SponsorKarolinska Institutet
Academic / other
Locations2 sites (Bergamo and 1 other locations)
StatusRecruiting
StartedJanuary 1, 2017
Main results expectedDecember 31, 2027
Study endsDecember 31, 2028
Registry record updatedMay 8, 2026
Trial IDNCT03981107 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are adults who are unconscious with no or abnormal breathing, and whose cardiac arrest is witnessed by a bystander trained in CPR.

Probably not a fit

Patients who are under 18 years old, have asphyxia-related cardiac arrest, or have not been trained in CPR may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This trial investigates the effectiveness of Chest Compression Only CPR (CO-CPR) versus Standard CPR (S-CPR) in cases of out-of-hospital cardiac arrest (OHCA). It is a multicenter, randomized, open-label trial where bystanders trained in CPR will receive dispatcher instructions to perform either CO-CPR or S-CPR. The primary goal is to determine if CO-CPR is non-inferior to S-CPR in terms of survival rates. The study aims to enhance bystander CPR rates and improve outcomes for patients experiencing OHCA.

Why it matters

Potential benefit: If successful, this study could lead to increased survival rates for patients experiencing out-of-hospital cardiac arrest.

How similar studies have gone: Previous studies have shown promising results for CO-CPR, suggesting it may be as effective as traditional CPR in certain scenarios.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Unconsciousness with no, abnormal or agonal breathing (suspected OHCA)
* The suspected OHCA is witnessed (seen or heard)
* Any Bystander at the scene has previous training in CPR

Exclusion Criteria:

* Age below 18 years
* Collapse is not witnessed
* Bystander has no prior CPR training
* Obvious asphyxia (i.e. hanging, foreign body, suffocation, strangulation)
* Obvious drug overdose / intoxication
* Pregnancy
* Trauma (penetrating, blunt, burn injury)

Post randomisation exclusion Criteria from data analysis:

* Not EMS-verified cardiac arrest
* Previous do not resuscitate (DNR) decision

Where it's running

  • AREU, Agenzia Regionale Emergenza Urgenza
    Bergamo, Italy
    Recruiting
  • SOS Alarm AB
    Stockholm, Sweden
    Recruiting

Study contacts

  • Principal investigator: Jacob Hollenberg, MD, PhD — Karolinska Institutet
  • Study coordinator: Jacob Hollenberg, MD. PhD
  • Email: jacob.hollenberg@ki.se
  • Phone: 004686163816

Similar studies

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How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.