Arrhythmias & electrophysiology

Association of Atrial Fibrillation Burden and Mortality Among Patients With Cardiac Implantable Electronic Devices

CirculationPublished Retrospective cohort study

Main finding · Adjusted all-cause mortalityResult — go to the resultHazard ratio 1.29 95% CI 1.20–1.39

Authors' conclusion

After adjustment for potential confounding factors, the presence of AF was associated with higher mortality in our cohort of patients with cardiac implantable electronic devices. Among those with AF, nonparoxysmal AF was associated with the greatest risk of mortality.

Study context

Population
Patients with cardiac implantable electronic devices transmitting data ≥6 months after implantation, US claims database 2015–2020analysed
Participants
21,391 patients
Exposure
Device-recognized atrial fibrillation (AF) vs no AF
  • AFn = 7,798
Outcome
All-cause mortality
Follow-up
Mean 22.4±12.9 months
Methodological detailsclaims database linked to device database
  • Claims database linked to device database

Main finding

Adjusted all-cause mortality

Hazard ratio

1.29

95% CI 1.20–1.39

P < 0.001

AFvs No AF
HR 1.29 (95% CI 1.20–1.39); P < 0.001

As reported in the abstract

Overall incidence of mortality
13.5%

Observational data: associations, not effects.

Secondary outcomes

OutcomeHR (95% CI)P value
Mortality by AF type (among AF)Persistent AFvs Paroxysmal AF1.36 (1.18–1.58)P < 0.001
Mortality by AF type (among AF)Permanent AFvs Paroxysmal AF1.23 (1.14–1.34)P < 0.001

Original publication

Association of Atrial Fibrillation Burden and Mortality Among Patients With Cardiac Implantable Electronic Devices. Circulation. Published 28 June 2024. doi:10.1161/circulationaha.124.069757

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