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.
Quick facts
| Phase | Phase 4 |
|---|---|
| Study type | Interventional |
| Ages | 18 Years and up |
| Sex | All |
| Enrollment | 1250 (estimated) |
| Sponsor | Unity Health Toronto Academic / other |
| Locations | 9 sites (Victoria, British Columbia and 8 other locations) |
| Status | Recruiting |
| Started | May 24, 2023 |
| Main results expected | December 2028 |
| Study ends | December 2028 |
| Registry record updated | October 2, 2026 |
| Trial ID | NCT03826524 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
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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
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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
- Principal investigator: Paul Dorian, MD, MSc — Unity Health Toronto
- Study coordinator: Theresa Aves, MSc
- Email: theresa.aves@unityhealth.to
- Phone: 416-864-6060
Similar studies
Other studies for the same condition or treatment. Recruiting studies are listed first.
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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.
-
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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.
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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.
-
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.
How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.