Acute myocardial ischemia is usually serious, and patients should be considered to have acute coronary syndrome, and should undergo urgent laboratory tests for myocardial enzymes, as well as oxygen and electrocardiogram, and observe the dynamic evolution of electrocardiogram to determine whether acute myocardial infarction has occurred. For patients with severe coronary stenosis, coronary stent implantation should be performed. If the patient’s condition does not allow for coronary stent implantation, coronary bypass grafting should be considered if necessary, and patients are advised to chew aspirin, Polivyte, and Lipitor to enhance the antiplatelet and lipid-lowering effects. In case of severe pain, isosorbide nitrate or nitroglycerin can be administered to relieve the discomfort in the precordial region.