Normal activities can usually be resumed 3 to 6 months after myocardial infarction, depending on the degree of stenosis in the heart vessels of the individual, the number of underlying diseases of the patient himself and the individual’s ability to recover. Myocardial infarction is a cardiac emergency that occurs when the coronary arteries of the heart are narrowed and blocked, causing acute ischemia and hypoxia, resulting in necrosis of the myocardial cells. Myocardial infarction can also be followed by recurrent infarction, heart failure, sudden cardiac death, arrhythmia and other adverse cardiovascular events. After myocardial infarction, it is recommended to quit smoking, avoid heavy physical labor, take medication regularly for 3-6 months, and resume normal physical activities if there is no discomfort. If the patient has abnormal results after 3~6 months of myocardial infarction, or reoccurrence of chest pain, chest tightness or heart failure symptoms, further hospitalization is recommended.