Myocardial infarction is generally caused by the occlusion of the lumen of the coronary artery supplying blood to the heart due to acute thrombosis or coronary spasm caused by the rupture of plaque on the basis of atherosclerosis and stenosis in the lumen, which can result in persistent ischemia and hypoxia of the myocardium and necrosis. Many causative factors promote and trigger the occurrence of myocardial infarction, such as smoking, heavy alcohol consumption, satiety, cold, excessive physical labor, emotional excitement, etc. Patients must go to the hospital immediately for specific diagnosis and treatment. ECG and triple infarction tests are required for initial diagnosis, and emergency coronary angiography and emergency coronary stent implantation, if necessary, along with corresponding medication, are required to standardize the treatment of myocardial infarction. The course of acute myocardial infarction is more acute, so the main thing is to pay attention to physical examination to prevent myocardial infarction.