Clinical trial Recruiting at 9 sites Phase 4 Interventional Ages 18 and up

Evaluating low versus standard doses of epinephrine for out-of-hospital cardiac arrest

Official title: CanROC Epinephrine Dose: Optimal Versus Standard Evaluation Trial (CanROC EpiDOSE Trial)

Run by Unity Health Toronto · NCT03826524 · Data updated 2026-11-12

This study tests whether giving a lower dose of epinephrine can help adults who have a cardiac arrest outside of the hospital more effectively than the standard higher dose.

More Sudden Cardiac Arrest trials

Quick facts

PhasePhase 4
Study typeInterventional
Ages18 Years and up
SexAll
Enrollment1250 (estimated)
SponsorUnity Health Toronto
Academic / other
Locations9 sites (Victoria, British Columbia and 8 other locations)
StatusRecruiting
StartedMay 24, 2023
Main results expectedDecember 2028
Study endsDecember 2028
Registry record updatedOctober 2, 2026
Trial IDNCT03826524 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are adults who have suffered an out-of-hospital cardiac arrest with a recorded initial rhythm of ventricular fibrillation or pulseless ventricular tachycardia.

Probably not a fit

Patients who are under 18 years old or have a cardiac arrest due to a non-cardiac cause will 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 randomized controlled trial aims to compare the effectiveness of a low cumulative dose of epinephrine (up to 2mg) against a standard cumulative dose (up to 6mg) in adult patients experiencing out-of-hospital cardiac arrest due to ventricular fibrillation or pulseless ventricular tachycardia. Eligible patients will be treated by paramedics who will perform CPR and defibrillation, followed by the administration of epinephrine based on the assigned treatment group. The study will track outcomes until the return of spontaneous circulation is achieved or resuscitation is terminated, with follow-up conducted through administrative databases and interviews.

Why it matters

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

How similar studies have gone: Other studies have explored epinephrine dosing in cardiac arrest, but this specific low-dose approach is novel and has not been extensively tested.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Out-of-hospital cardiac arrest treated by paramedics AND
* Initial recorded cardiac rhythm of VF or pulseless VT, or, AED shock on first analysis administered or confirmed by paramedics or fire services, AND
* Established intravenous vascular access

Exclusion Criteria:

* Known or apparent age \<18 years
* Initial recorded cardiac rhythm of VF or pulseless VT, or, AED shock on first analysis administered or confirmed by paramedics
* Cardiac arrest due to an obvious non-cardiac primary cause (e.g. blunt or penetrating trauma, exsanguination, burns, drug overdose, drowning, anaphylaxis, sudden asphyxiation, etc.)
* Administration of intramuscular, endotracheal tube, or intraosseous epinephrine
* Prisoners or persons in police custody
* Known allergy or sensitivity to epinephrine

Where it's running

  • British Columbia Emergency Health Services (BCEHS)
    Victoria, British Columbia, Canada
    Recruiting
  • Peel Regional Paramedic Services
    Brampton, Ontario, Canada
    Recruiting
  • Middlesex-London Paramedic Service
    London, Ontario, Canada
    Recruiting
  • Halton Region Paramedic Services
    Oakville, Ontario, Canada
    Recruiting
  • Ottawa Paramedic Services
    Ottawa, Ontario, Canada
    Recruiting
  • Superior North Emergency Medical Services
    Thunder Bay, Ontario, Canada
    Recruiting
Show 3 more locations
  • Region of Waterloo Paramedic Services
    Waterloo, Ontario, Canada
    Recruiting
  • Essex-Windsor Emergency Health Services
    Windsor, Ontario, Canada
    Recruiting
  • Medavie Health Services West
    Saskatoon, Saskatchewan, Canada
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

  • Cardiac Arrest: Using Ultrasound to Find Hidden Blood Flow

    This study tests whether patients who have out-of-hospital cardiac arrest but no pulse still show some blood flow on ultrasound and whether that finding relates to survival.

    Recruiting University of Massachusetts, Worcester · Denver, Colorado and 7 other locations · NCT07897370

  • Risk of malignant arrhythmias after acute coronary syndrome

    This study tracks how often dangerous heart rhythms occur in adults admitted for ACS and looks for patterns that might predict them.

    Recruiting Catharina Ziekenhuis Eindhoven · Eindhoven, North Brabant · NCT07824050

  • Predict Arrhythmia Risk with Intelligent Software

    Researchers are testing AI-powered predictions to see if clinicians can spot patients at risk for dangerous heart rhythms using bedside ECG data.

    Recruiting Catharina Ziekenhuis Eindhoven · Eindhoven, North Brabant · NCT07792694

  • Prehospital femoral arterial access to monitor blood pressure during OHCA

    This pilot study tests whether placing a femoral arterial sheath before hospital arrival is feasible and safe in adults with non-traumatic OHCA to enable invasive blood pressure monitoring and better vasopressor control.

    Recruiting Emergency Medical Service, Prague · Prague · NCT07596446

  • Predicting sudden cardiac arrest risk in people with coronary artery disease

    This project will try to see if combining genetics, ECGs, blood biomarkers, imaging, and psychosocial information can predict which people with coronary artery disease are most likely to have sudden cardiac arrest.

    Recruiting at 3 sites Tampere Heart Hospital · Hadera and 2 other locations · NCT07444931

  • Low-dose beta-blocker treatment for adults who survived unexplained ventricular fibrillation

    This trial will try low-dose beta-blockers in adults who survived an out-of-hospital cardiac arrest with no clear cause to see if it reduces dangerous heart rhythms and ICD therapies.

    Recruiting Phase 4 Copenhagen University Hospital, Rigshospitalet · Copenhagen, Dr. and 1 other locations · NCT07405229

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.