Old myocardial infarction is considered a serious disease, but some patients can remain stable for a long time if they are actively treated. Chronic myocardial infarction is the blockage of coronary arteries, resulting in complete necrosis of part of the myocardium, and the necrotic myocardium is gradually fibrotic, and scar healing is gradually formed, which is a very serious disease. Some patients with old myocardial infarction with large infarction area have uncoordinated cardiac contraction, gradual ventricular remodeling, and gradual heart failure, which requires early prevention of ventricular remodeling and long-term adherence to regular medication. Patients with a history of myocardial infarction should be treated regularly with oral aspirin, atorvastatin and other drugs, and if necessary, check coronary angiography to understand the lesions of the coronary arteries, and treatment under the guidance of physicians.