Figure 1 Kaplan–Meier survival curves for patients with chronic
atrial fibrillation
a Event-free rate of heart failure hospitalisation for patients
with REF (LVEF < 50%) and those with PEF (LVEF ≥ 50%).b Event-free rate of heart failure hospitalisation for patients
with LVEDP ≤ 15 mmHg and those with LVEDP > 15 mmHg.
LVEDP=left ventricular end-diastolic filling pressure, LVEF=left
ventricular ejection fraction; PEF=preserved ejection fraction;
REF=reduced ejection fraction.