Myocardial infarction may present with symptoms such as chest pain, weakness, panic, shortness of breath, and irritability. Symptoms of myocardial infarction are often of acute onset, and most patients with myocardial infarction will have prodromal symptoms several days before the onset of the disease. Acute severe and persistent chest pain is one of the typical clinical manifestations of the disease, which occurs early in the morning, often in quiet time, and the pain is heavier and lasts longer than the usual angina pectoris. At the same time, the patient will be accompanied by irritability, weakness, panic, sweating, fear, chest tightness, or a sense of near death, and some of the patients may also experience radiating pain in the jaw, neck, back, left shoulder and arm. Patients with sudden intolerable chest pain, shoulder and back pain, epigastric pain, with a sense of near death, which cannot be relieved by sublingual nitroglycerin tablets or fast-acting heart-saving pills, should pay full attention to the above symptoms and go to the hospital in time.