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Uses a smartwatch to detect irregular heartbeat after heart surgery

Tests a smartwatch heart-rhythm check in adults after heart surgery for atrial fibrillation.

Key facts

Who runs it
Centre Hospitalier Universitaire, Amiens
Where
Amiens, FranceSee the site
Trial code
Registry title
Diagnosis of Postoperative Atrial Fibrillation by a Smartwatch
Status
Recruiting
People taking part
324 people, planned
Started
6 Oct 2022
Expected to end
6 Jul 2028
Type of study
Interventional, 2 groupsOne group gets an existing treatment, for comparison.
Treatments tested
  • ECG
  • scanwatch
Record updated
24 February 2026

Who can take part

AI summary

From the trial's eligibility criteria. Machine-read from the registry text on this page, so it can be wrong. The registry text below and the trial team decide who can take part.

The trial is looking for adults who recently had on-pump heart surgery and moved to the cardiac surgery ward. It tests whether a smartwatch can find atrial fibrillation after surgery.

Age
Adults over 18 years old
Sex
All sexes
Disease stage
Recent on-pump cardiac surgery (less than 96 hours ago), now in the cardiac surgery department of Amiens University Hospital
Earlier treatment
Must have had on-pump cardiac surgery less than 96 hours ago. Must not have been included in another interventional study that may change the rate of postoperative atrial fibrillation.

Main reasons for not taking part

  • History of atrial fibrillation
  • Need for heart rhythm monitoring by telemetry in intensive care for atrioventricular block or a very fast rhythm disorder (>140 bpm)
  • External pacemaker connected to epicardial electrodes that depends on ventricular and atrial pacing
  • Already in another interventional clinical study that may change the rate of postoperative atrial fibrillation
  • Pregnancy

The registry criteria, word for word

Show all 12 criteriaShow less

Who can take part

  • Adult patient (>18 years old)
  • The patient was hospitalized at Amiens University Hospital for on-pump cardiac surgery
  • The patient has had a recent on-pump cardiac surgery (< 96h)
  • Patient with the motor and cognitive abilities to perform a 1-lead ECG with the smartwatch
  • The patient was transferred to the cardiac surgery department of Amiens University Hospital
  • The beneficiary of a social security plan
  • Signature of the consent to participate in the study

Who cannot take part

  • History of AF
  • Need for rhythmic monitoring by telemetry in cardiac intensive care for atrioventricular block and rapid supra and ventricular rhythm disorder (>140 bpm)
  • An external pacemaker connected to epicardial electrodes depends on ventricular and atrial pacing
  • Patients already included in an interventional clinical research protocol may alter the incidence of POAF
  • Pregnant woman

Where in France

  • Chu Amiens PicardieAmiens, FranceContact: Christophe Beyls, MDTaking people

About the trial

What the trial wants to find out

The incidence of postoperative atrial fibrillation (POAF) after on-pump cardiac surgery remains high, at around 30%. POAF increases the risk of cardiac decompensation, stroke, acute myocardial infarction, and death, resulting in increased morbidity and mortality, hospital length of stay, and cost of patient management. Episodes of POAF are usually paroxysmal and asymptomatic, increasing the risk of developing permanent AF at five years by 4 to 5 times. POAF occurs between 3 and 4 days after cardiac surgery, mainly when the patient is hospitalized in a surgical ward without heart rate monitoring as opposed to critical care, where the patient benefits from continuous rhythmic monitoring. The diagnosis of POAF is therefore made with the help of a 12-lead electrocardiogram (ECG) when the patient presents clinical symptoms and when the medical staff notes a significant variation in heart rate. However, many patients with episodes of asymptomatic POAF have a higher risk of stroke and mortality than those with symptomatic POAF.

Read full original descriptionShow less

Faced with this public health problem, the development of tools for diagnosing AF is in full swing, mainly the marketing of smartwatches (SWs) that allow for the performance of 1-lead ECG. SW is also equipped with algorithms to analyze heart rate variability and diagnose asymptomatic atrial fibrillation (AF) episodes. The European Society of Cardiology (ESC) and the European Association for Cardio-Thoracic Surgery (EACTS) recommend the use of smartwatches to detect AF, in particular, to reduce the economic impact of AF.

The aim of the study is to diagnose POAF within the first five days after patient discharge from the critical care unit for the cardiac surgery department.

The 2 groups in the trial

  • smartwatches groupTreatment being tested

    Treatment: scanwatch

  • no smartwatche groupExisting treatment, for comparison

    Treatment: ECG

Questions to ask the study team

  1. How often do I need to come in, and for how long each time?
  2. Are travel costs paid?
  3. Can I keep my own doctor?
  4. What happens if I want to stop?

Contact the study team: see the registry record → Contacts and Locations

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Data and sources

Registry record
Listed on ClinicalTrials.gov.
Official title
Diagnosis of Postoperative Atrial Fibrillation After Cardiac Surgery by a Smartwatch: an Open-label Randomized Controlled Trial
Plain-language title
Uses a smartwatch to detect irregular heartbeat after heart surgeryGenerated from the registry record. The registry title is the official one.
AI summary
From the trial's eligibility criteria. Read by machine on 12 November 2026.
Publications
Record updated
24 February 2026