The compared general data included the age, male proportion, and history of diabetes; the postoperative medications included diuretics, digoxin, angiotensin-converting enzyme inhibitors (ACEI)/angiotensin II receptor blockers (ARB), and β-receptor blockers; the ultrasound indicators were LVEF, LVESV, LVEDV, and QRS duration (QRSd). Here, ACE is linked to diabetes mellitus.