Plain-English translation of NCT06556667 on ClinicalTrials.gov ↗ · Source last updated · Translation generated · How we translate trials
This study doesn't follow the usual testing phases — it may be an observational study or a different type of research.
This trial is testing whether a stronger defibrillator (one that can deliver up to 360 joules of energy) works better than a standard defibrillator (up to 200 joules) at stopping atrial fibrillation and restoring a normal heartbeat. Atrial fibrillation is a condition where your heart's upper chambers beat irregularly, and a procedure called cardioversion uses electrical shocks to reset your heart rhythm. The researchers want to find out which defibrillator strength is most effective and safe.
Hospitals currently use different starting energy levels and machines when performing cardioversion, and there isn't clear evidence about which approach works best. This trial exists to determine whether the stronger defibrillator improves success rates and helps doctors provide the most effective treatment for atrial fibrillation.
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You will be randomly assigned to receive cardioversion treatment using one of the two defibrillator machines. During the procedure, you'll receive sedation, and the defibrillator will deliver electrical shocks to restore your normal heart rhythm. The main difference is whether your machine will use a maximum energy of 200 joules or 360 joules. The research team will track whether the procedure successfully restores your normal rhythm and monitor you for any side effects.
AI-generated summary from trial data · Jun 17, 2026 · Not medical advice
Canada
Sponsor
Ottawa Heart Institute Research Corporation
Enrollment target
~376 participants
Started
March 2025
Primary completion
September 2027
Age range
18 Years and older
Last updated on clinicaltrials.gov in February 2026.
Reach out to the team running this trial. Response times vary — some teams are faster than others.
Central contact
Tammy Knight
Ottawa Heart Institute Research Corporation
Tell us you're interested and we'll help connect you with the research team. We'll walk you through what to expect first — no email needed to get started.