ACE and atrial fibrillation: ACE: angiotensin-converting enzyme; AFib: atrial fibrillation; ARB: aldosterone receptor blocker; BMI: body mass index; CICU: coronary intensive care unit; CKMB: creatinine kinase-myocardial band; MI: myocardial infarction; NSTEMI: non-ST-elevation myocardial infarction; SD: standard deviation; STEMI: ST-elevation myocardial infarction