Heart failure & cardiomyopathies
Incidence of Cardiac Arrhythmias Identified by Insertable Cardiac Monitors in Patients With Symptomatic Heart Failure
Authors' conclusion
In CHF patients undergoing ambulatory, continuous, accurate arrhythmia monitoring, the incidence of AF and bradycardia/pause events was high and similar in HFpEF vs HFrEF patients. VT/VF was lower in HFpEF than HFrEF, but clinically important.
Study context
- Population
- Chronic heart failure (CHF) patients with recent HF events, not indicated for cardiac implantable electronic devices, implanted with an insertable cardiac monitor49.1% ejection fraction (EF) ≥50%
- Participants
- 163 patients
- Comparison
- Heart failure with reduced ejection fraction (HFrEF) vs heart failure with preserved ejection fraction (HFpEF)
- Outcome
- Occurrence of cardiac arrhythmias (AF, VT/VF, bradycardia/pauses)
Methodological detailsLINQ-HF and Phase 1 ALLEVIATE-HF studies, AI adjudication then manual verification
- LINQ-HF and Phase 1 ALLEVIATE-HF studies
- AI adjudication then manual verification
Pooled result
As reported in the abstract
Cardiac arrhythmias
AF occurrence
AF incidence without prior AF
Bradycardia or pause
VT/VF
- Atrial fibrillation (AF) occurrence overall at 2 years
- 59.7%
- AF incidence without prior AF, overall
- 23.8%
- Bradycardia or pause, overall
- 37.2%
- Bradycardia or pause during daytime
- 30.3%
- Bradycardia or pause during nighttime
- 19.4%
- Ventricular tachycardia (VT)/VF, overall
- 14.3%
Original publication
Incidence of Cardiac Arrhythmias Identified by Insertable Cardiac Monitors in Patients With Symptomatic Heart Failure. JACC Heart Fail. Published 1 July 2025. doi:10.
Summarised from the published abstract; every number is checked against it