Sudden heart attack often manifests as pain in the precordial region, and the pain can radiate to the left shoulder, and accompanied by chest tightness, dyspnea, sweating and other symptoms, should be treated as soon as possible. 1, call the emergency phone: the first time to call 120 emergency phone, call the ambulance as soon as possible to send to the hospital; 2, adjust the position: let the patient maintain a quiet state, reduce its activities, using the sitting position with legs down, but also according to personal circumstances to take a comfortable Keep the surrounding environment quiet and air circulation; 3, oxygen: if there is oxygen equipment should immediately absorb oxygen to relieve symptoms; 4, drug first aid: should immediately sublingual nitroglycerin or oral aspirin, but need to be alert to the occurrence of hypotension, family members can help patients measure blood pressure; 5, cardiopulmonary resuscitation: if cardiac arrest occurs, need to immediately perform chest compressions and artificial respiration, cycle repeated operations until the heartbeat Recovery. After arriving at the hospital, patients with heart attack need to complete electrocardiogram, blood tests and coronary angiography. Based on the examination results, it is decided whether coronary stenting is needed, and thrombolytic therapy is usually recommended within 30 minutes, and interventional therapy is recommended beyond 90 minutes.