Values are mean ± SD or n (%). The P values are results for the t-test or the chi-square test. BMI= body mass index， PAF= paroxysmal atrial fibrillation; CAD= coronary artery disease; LAD= left atrial diameter; LVEDD= left ventricular end-diastolic dimension; LVEF= left ventricular ejection fraction; OAT= oral anticoagulant therapy.