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Clinical and prognostic effects of atrial fibrillation in heart failure patients with reduced and preserved left ventricular ejection fraction

Atrial fibrillation (AF) is common in heart failure (HF), but few data regarding the prognostic relevance of AF are available in HF patients with preserved left ventricular ejection fraction (HF‐PEF). We aimed to study the clinical impact of AF vs. sinus rhythm (SR) in stabilized HF patients with reduced left ventricular ejection fraction (HF‐REF) and in those with preserved left ventricular ejection fraction (HF‐PEF).