Key result
Four weeks of ECG monitoring detects ~78% more subclinical AF cases than two weeks.
Why the study?
The prevalence of subclinical AF in the elderly general population is unclear.
Population
2616 community-based ARIC study participants aged 79±5 years
Comparison
4 vs 2 weeks of continuous ECG monitoring
Design
Multicenter observational cross-sectional analysis
Authors
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Extended monitoring may increase subclinical AF detection in elderly; leaves open optimal duration and outcome impact.
Continuous ambulatory ECG monitoring for up to 2 weeks in a community-dwelling elderly population revealed a 2.5% prevalence of subclinical AF, with extended monitoring up to 4 weeks providing substantial incremental diagnostic yield.
Rooney et al. (2019) studied this question. The prevalence of subclinical atrial fibrillation was 2.5%, with 78% more cases detected using 4 weeks of ECG monitoring compared to 2 weeks.
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