Myocardial infarction is one of the more serious types of coronary heart disease, so it can be said that all patients with heart attack are patients with coronary heart disease, coronary heart disease also includes angina pectoris, ischemic cardiomyopathy, sudden death and so on. Coronary heart disease is due to the coronary arteries supplying myocardial cells atherosclerosis caused by narrowing or occlusion of the lumen, resulting in myocardial ischemia and hypoxia or even necrosis of a class of diseases. According to the development characteristics can be divided into two categories: ① chronic coronary artery disease: such as stable angina, ischemic cardiomyopathy, etc.; ② acute coronary syndrome: such as unstable angina, myocardial infarction. Myocardial infarction is the more serious type of coronary heart disease, due to severe narrowing or even occlusion of the coronary artery caused by local necrosis of the myocardium, can appear in the precordial area, posterior sternal intense crushing pain, which can be radiated to the back of the neck, with irritability, sweating, fear, and even cause cardiac failure, hypotension, shock and so on. People over 40 years old and with risk factors such as hyperlipidemia, hypertension, smoking addiction, diabetes, obesity, etc., should go to the hospital as soon as possible if there are repeated episodes of chest tightness and vague pain in the chest, early identification of coronary artery disease, and comply with the doctor’s instructions to apply aspirin, statin and other drugs and other medications to slow down the progression of the disease and prevent the occurrence of heart attack.