A cardiac triple test is a laboratory test, and a positive test is considered a high probability of myocardial infarction. Cardiac triple test includes myoglobin, troponin and creatine kinase isoenzyme. Myoglobin usually rises about 2 hours after a myocardial infarction, troponin mostly rises in 3 to 4 hours, and creatine kinase isoenzyme is mostly positive in about 4 hours. If all three are positive, a myocardial infarction is likely. Myocardial infarction should first complete the electrocardiogram, and dynamic observation of electrocardiogram changes, the electrocardiogram will generally show that the ST segment bow back upward elevation, and at the same time will also show chest pain, pain time is more than half an hour, oral nitroglycerin can not be relieved, the emergence of acute myocardial infarction must quickly consult a doctor, in accordance with the doctor’s instructions for reasonable treatment.