Prognostic implications of atrial fibrillation in heart failure with reduced, mid-range, and preserved ejection fraction: a report from 14 964 patients in the European Society of Cardiology Heart Failure Long-Term Registry

The prevalence of AF increases with increasing EF but its association with worse cardiovascular outcomes, remained significant in patients with HFpEF and HFmrEF, but not in those with HFrEF.