NPPB and atrial fibrillation: Before and after catheter ablation (CA) for asymptomatic persistent atrial fibrillation, quality of life (QOL) was assessed using the AF QOL questionnaire (AFQLQ), and cardiac function was assessed by measuring the plasma B‐type natriuretic peptide (BNP) level, left ventricular ejection fraction (LVEF), and left atrial diameter (LAD) with transthoracic echocardiogram and left atrial (LA) volume with computed tomography (CT).