Simple changes to electrode placement could boost heart shock success
NCT ID NCT05511389
First seen Jul 16, 2026 · Last updated Jul 17, 2026 · Updated 1 time
Summary
This trial tests whether the position of the electrodes on the chest — front-to-back versus front-to-side — and applying manual pressure to the electrodes improve the success of electrical cardioversion for atrial fibrillation. About 1750 adults scheduled for non-urgent cardioversion will be randomly assigned to one of the two electrode positions. Those who remain in atrial fibrillation after the first shock will then be randomly assigned to receive manual pressure or not. The goal is to see which approach restores normal heart rhythm more effectively.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
- Active substance
- electrical cardioversion with different electrode positions and manual pressure
- What this could lead to
- If successful, this trial could establish a simple, low-cost technique to improve cardioversion success, reducing the need for additional medications or invasive procedures for many patients with atrial fibrillation.
- What could go wrong
- This is a single trial testing two modifications to a standard procedure; results may not show a meaningful difference, or benefits may not apply to all patient groups.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
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Study contacts
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Contact
Phone: •••-•••-•••• Email: •••••@•••••
Locations
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Hamilton Health Sciences
RECRUITINGHamilton, Ontario, L8L2X2, Canada
Contact Email: •••••@•••••
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Institut Universitaire De Cardiologie Et De Pneumologie de Québec
RECRUITINGQuébec, Quebec, Canada
Contact
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Institut de cardiologie de Montréal
ACTIVE_NOT_RECRUITINGMontreal, Quebec, Canada
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Women's College Hospital
RECRUITINGToronto, Ontario, Canada
Contact
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