Lateral wall myocardial infarction is usually not completely normalized, and the purpose of treatment is to prevent cardiac insufficiency and the occurrence of another myocardial infarction. Once myocardial infarction occurs, it will lead to complete necrosis of myocardial tissue at the distal end of the infarcted blood vessel, which will eventually be replaced by scar tissue in the body, losing the function of normal contraction, and the myocardial contraction force of large myocardial infarction will be significantly reduced, and even heart failure. Patients with myocardial infarction should be treated regularly with oral aspirin, atorvastatin, isosorbide nitrate and other drugs. In severe cases, implantation of stents or coronary artery bypass grafting is also required. The treatment can alleviate the patient’s symptoms, prevent the patient from developing severe cardiac insufficiency, and at the same time prevent the occurrence of another myocardial infarction and improve the patient’s quality of life. Patients with myocardial infarction should undergo regular treatment under the guidance of a physician.