Arrhythmias & electrophysiology
Remote activity and rhythm monitoring using patient-owned consumer devices after first-time pulmonary vein isolation
Main finding · Mean daily step-count change (primary functional outcome)Result — go to the resultChange +488 steps/day CI 187–789Authors' conclusion
Remote collection of activity and rhythm data from consumer smartphones and smartwatches is feasible, yielding high-coverage, multi-year research data. This enables scalable, objective quantification of longitudinal functional outcomes. Daily step count increased after PVI in this exploratory cohort and was inversely related to baseline AF burden.
Study context
- Population
- Atrial fibrillation (AF) patients enrolled in the prospective TRUST registry who underwent index pulmonary vein isolation (PVI) and reported owning an eligible smartphone
- Participants
- 280 eligible patients
- Exposure
- Mean daily step-count change between the one-year pre-PVI and two-year post-PVI windows
- Outcome
- Mean daily step-count change (primary functional outcome)
- Follow-up
- One-year pre-PVI and two-year post-PVI windows
Methodological detailsexploratory cohort, pre-specified feasibility criteria
- Exploratory cohort
- Pre-specified feasibility criteria
Main finding
As reported in the abstract
Change
+488 steps/day
CI 187–789
P = 0.002
Change by group
Pre-PVI
5731
mean · ± 2808 · steps/day
Post-PVI
6220
mean · ± 2816 · steps/day
Observational data: associations, not effects.
Further findings
| Outcome | Pre-PVI | Post-PVI | P value |
|---|---|---|---|
| AF burden in smartwatch users (exploratory) · after PVIAF burden decreased after PVI | 3.6% (bracket, printed without a label 1.6–10.8) | 0.0% (bracket, printed without a label 0.0–0.3) | P < 0.001 |
- AF burden in smartwatch users (exploratory): In 35 smartwatch users
Participation and technical success (feasibility)
- Attempted data transfer, of 280 eligible patients
- 172 (61%)
- Completed data transfer, of the 172 who attempted
- 154/172 (90%)
- Met pre-specified completeness criteria, of those who completed data transfer
- 123
Monitoring duration and temporal data coverage (feasibility)
- Median monitoring duration
- 6.0 [3.6, 6.6] years
- Coverage
- 98% [77, 100]
Baseline AF burden and daily step count (exploratory)
- Baseline AF burden inversely correlated with daily step count
- ρ=−0.36, p=0.035
Original publication
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