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Flowchart showing distribution of study patients with and without reduced left ventricular ejection fraction (rEF group). Included patients (n = 414) had a clinical follow‐up >90 days and LVEF assessment before and after cryoballoon PVI. Patients with modified heart failure therapy after index procedure, namely, revascularization, cardiac resynchronization, or intensified drug therapy were excluded from our study (n = 15).
