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

Study contacts

  • Contact

    Phone: •••-•••-•••• Email: •••••@•••••

Locations

  • Hamilton Health Sciences

    RECRUITING

    Hamilton, Ontario, L8L2X2, Canada

    Contact Email: •••••@•••••

  • Institut Universitaire De Cardiologie Et De Pneumologie de Québec

    RECRUITING

    Québec, Quebec, Canada

    Contact

  • Institut de cardiologie de Montréal

    ACTIVE_NOT_RECRUITING

    Montreal, Quebec, Canada

  • Women's College Hospital

    RECRUITING

    Toronto, Ontario, Canada

    Contact

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