Patients with sudden onset angina, or chest under the left chest pain, continued for more than half an hour, Mianwurense, cold sweat dripping, pulse fast, irregular heartbeat, and even shock, that the patient has some myocardial necrosis, has been suffering from myocardial infarction. Aid approach is : (1) is not in shock, can give the patient a sheet containing nitroglycerin (06 mg), severe pain may have heard of iso-amyl nitrite smell grease, half an hour to send B to hospital; (2) pairs of shock patients, should be Lying to take the state should not arbitrarily moving the patient, feet slightly boosted, head slightly to increase cerebral blood, should not be immediately taken to the hospital; (3) breathing and heartbeat have stopped, and shall immediately proceed to-mouth resuscitation and heart of the crowd pressure; (4) in the symptoms ease after the pulse frequency, rhythm are normal, no obvious symptoms of shock, sublingual nitroglycerin tablets, before it is sent to hospital for treatment. a lot of acute myocardial infarction patients, without on-site first aid the rush to the hospital, often die en route.