Diagnosis of Postoperative Atrial Fibrillation by a Smartwatch

NCT ID: NCT05573633

Last Updated: 2026-02-05

Basic Information

• Recruitment Status: RECRUITING
• Clinical Phase: NA
• Total Enrollment: 324 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2022-10-06
• Study Completion Date: 2028-07-06

Brief Summary

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.

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.

Conditions

Atrial Fibrillation; Cardiac Surgery

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: SCREENING
• Blinding Strategy: NONE

Study Groups

smartwatches group

Group Type: EXPERIMENTAL

scanwatch

Intervention Type: PROCEDURE

POAF will be diagnosed with a Withings SM (ScanWatch). FAPO diagnosed by the SW will have to be confirmed by a 12-lead ECG.

no smartwatche group

Group Type: ACTIVE_COMPARATOR

ECG

Intervention Type: PROCEDURE

the POAF will be diagnosed using a 12-lead ECG and according to the usual monitoring protocols for patients in the cardiac surgery department of Amiens University Hospital.

Interventions

ECG

the POAF will be diagnosed using a 12-lead ECG and according to the usual monitoring protocols for patients in the cardiac surgery department of Amiens University Hospital.

Intervention Type: PROCEDURE

scanwatch

POAF will be diagnosed with a Withings SM (ScanWatch). FAPO diagnosed by the SW will have to be confirmed by a 12-lead ECG.

Intervention Type: PROCEDURE

Eligibility Criteria

Inclusion Criteria

• 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

Exclusion Criteria

• 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

• Minimum Eligible Age: 18 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

Centre Hospitalier Universitaire, Amiens

OTHER

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Locations

CHU Amiens Picardie

Amiens, , France

Site Status: RECRUITING

Countries

France

Central Contacts

Christophe Beyls, MD

Role: CONTACT

beyls.christophe@chu-amiens.fr

03 22 08 78 66

Facility Contacts

Christophe Beyls, MD

Role: primary

Beyls.Christophe@chu-amiens.fr

0322087866

Other Identifiers

PI2021_843_0228

Identifier Type: -

Identifier Source: org_study_id