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Smartwatch could spot hidden heart flutters after surgery

NCT ID NCT05664308

Knowledge-focused Sponsor: Nantes University Hospital Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study tests whether a connected watch can better detect returning atrial fibrillation (an irregular heartbeat) in 106 adults who had heart surgery and developed a temporary irregular rhythm. Participants will wear the watch for 12 months, and doctors will compare how well it catches rhythm problems versus standard checkups at 3, 6, and 12 months. The goal is to see if the watch helps guide treatment and reduce complications.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

About 106 people

The number the study aims to enrol. It can still change while the study runs.

Started

Mar 2024

Expected to finish

Mar 2028

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

Patients with postoperative atrial fibrillation meeting the study eligibility criteria

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Major with an indication for conventional cardiac surgery with de novo postoperative AF onset. * Agreeing to participate in the study and having signed an informed consent. * Agreeing to undergo 12 months of postoperative monitoring. Exclusion Criteria: * Patient with pre-operative AF * Patient who does not have a smartphone compatible with the connected watch. * Patient unable to perform an ECG measurement independently. * Patient with a physical constraint to the measurement (arteriovenous fistula...) * Minors * Pregnant or breast-feeding women * Adults under guardianship, under curatorship * Patients whose life expectancy is less than 1 year * Patients participating in another therapeutic trial likely to impact the evaluation criteria of the MONHYCARD study * Contraindication to long-term anticoagulants * Patients implanted with a mechanical valve prosthesis pre-operatively or after surgery

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Conditions

The condition(s) this trial relates to.

atrial fibrillation

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Atrial fibrillation

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • CHU Nantes

    RECRUITING

    Nantes, Loire Atlantique, 44093, France

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