An analysis of the clinical characteristics of study subjects revealed that systolic blood pressure (SBP), diastolic blood pressure (DBP), heart rate, uric acid, total bilirubin, total cholesterol, low-density lipoprotein, sex, atrial fibrillation (AF), history of stroke, history of PCI, history of CABG, diabetes, smoking, aspirin, β-blocker, angiotensin-converting enzyme inhibitors (ACEIs), and statin were not significantly different between two groups (Table 1). Here, ACE is linked to atrial fibrillation.