Using a connected watch to monitor heart rhythm after cardiac surgery

Single-center Pilot Study to Evaluate the Interest of a Hybrid Connected Watch for Heart Rate Monitoring in Postoperative Cardiac Surgery

Nantes University Hospital · NCT05664308

This study is testing if a connected watch can help monitor heart rhythm in patients who have had heart surgery and experienced irregular heartbeats afterward.

Quick facts

Study typeObservational
Enrollment106 (estimated)
Ages18 Years and up
SexAll
SponsorNantes University Hospital (other)
Locations1 site (Nantes, Loire Atlantique)
Trial IDNCT05664308 on ClinicalTrials.gov

What this trial studies

This observational pilot study aims to utilize a hybrid connected watch for monitoring cardiac rhythm in patients who have experienced postoperative atrial fibrillation (POAF) following major cardiac surgery. The study will track the absence of recurrence or maintenance of sinus rhythm over a 12-month period, providing valuable data to assist cardiologists in managing these patients. Participants will undergo clinical follow-up and ongoing ECG monitoring to assess their heart rhythm status. The study is conducted at a single center, Nantes University Hospital.

Who should consider this trial

Good fit: Ideal candidates are adults undergoing major cardiac surgery who develop new-onset postoperative atrial fibrillation and can commit to 12 months of monitoring.

Not a fit: Patients with pre-existing atrial fibrillation or those unable to independently perform ECG measurements will not benefit from this study.

Why it matters

Potential benefit: If successful, this approach could enhance the management of postoperative atrial fibrillation, leading to better patient outcomes and reduced complications.

How similar studies have performed: While the use of connected devices for monitoring cardiac conditions is gaining traction, this specific approach in the postoperative setting is relatively novel and has not been extensively tested.

Eligibility criteria

Show full inclusion / exclusion criteria
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

Where this trial is running

Nantes, Loire Atlantique

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.

View on ClinicalTrials.gov →

Conditions: Atrial Fibrillation, Post Operative Atrial Fibrillation, Connected Watch

Last reviewed 2026-05-15 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.