Patients with hypertension need to do preoperative evaluation for surgery because hypertension can lead to left ventricular hypertrophy, and hypertensive left ventricular hypertrophy can increase myocardial ischemia in the perioperative period, even if there is no stenosis of the coronary arteries, patients with hypertensive left ventricular hypertrophy and mismatch between blood supply and demand can have myocardial ischemia, so such patients should have better blood pressure control, and one of the best options for drug selection for hypertension is to be able to prevent postoperative the development of hypertension. Most patients undergoing elective surgery are selected for morning procedures, and antihypertensive medications should be continued until the morning procedure. However, angiotensin receptor blockers or angiotensin-converting enzyme inhibitors should be discontinued 12-24 hours before surgery to prevent the induction of hypotension during maintenance anesthesia, and calcium antagonists may reduce mortality and myocardial ischemia and are recommended to be continued until the morning procedure.