Arrhythmias & electrophysiologySecondary analysis
Wearable smartwatches for atrial fibrillation detection and burden estimation after ablation: comparison with continuous monitoring
- Secondary analysis of the CIRCA-DOSE randomised trial
- simulation study
Authors' conclusion
Smartwatch-based AF detection algorithms demonstrate strong correlation with ICM-derived AF burden and clinically good sensitivity for recurrence detection, outperforming conventional non-invasive strategies.
Study context
- Population
- Patients after atrial fibrillation (AF) catheter ablation with continuous ICM data
- Participants
- 346 patients
- Comparison
- Simulated smartwatch algorithms vs ICM
- Primary endpoint
- Sensitivity for arrhythmia recurrence and correlation with ICM-derived AF burden
Primary result
As reported in the abstract
Sensitivity for AF recurrence; correlation with ICM-derived AF burden
Apple Watch AF Burden
82.2%
sensitivity
Apple Watch IRN
70.6%
sensitivity
Fitbit IHRD
64.4%
sensitivity
Intermittent AECG monitors
15.8-64.6%
sensitivity
Further findings
AF recurrence
- AF recurrence occurred in 47.1% of patients
AF burden among missed recurrences
- Median AF burden among missed recurrences
- <0.02%
Sensitivity by daily wear time and patient activity
- Sensitivity with 24-hour use
- >90%
- Patient activity modestly reduced detection
Original publication
Wearable smartwatches for atrial fibrillation detection and burden estimation after ablation: comparison with continuous monitoring. Europace. Published 10 November 2025. doi:10.1093/europace/euaf280
Summarised from the published abstract; every number is checked against it