If the patient is currently experiencing chest pain, then it is recommended that sublingual nitroglycerin or heart pills be administered to first stop the onset of this pain and then further measure the heart rate and blood pressure. For example, if the blood pressure is not low and the heart rate is fast, then it is recommended that the patient can also take oral metoprolol or bisoprolol to improve myocardial ischemia. If the patient has severe pain and the pain lasts for a long time, it is recommended that the patient should have an electrocardiogram and myocardial enzymatic tests to determine whether an acute myocardial infarction may have occurred. If acute coronary syndrome is considered, then it is recommended that the patient also chew aspirin, clopidogrel, atorvastatin and other drugs, which can play an intensive antiplatelet, as well as intensive lipid-lowering effect.