If myocardial ischemia occurs, it is due to the narrowing of the coronary arteries, resulting in insufficient blood supply, so that the myocardium produces symptoms of ischemia and hypoxia. The manifestation is usually dominated by angina pectoris, and if myocardial ischemia is identified. The medication has to be taken for life, that is to say, for the rest of its life, every day, regularly, quantitatively and regularly. It is also necessary to pay attention to regular reviews, according to the results of which the dose of the drug is adjusted. In terms of medications, the main ones are isosorbide mononitrate dispersible tablets, aspirin, clopidogrel, tegretol, and so on, which are able to dilate the coronary artery and anticoagulant. In addition, nitroglycerin or musk cardioprotection pills should be prepared, and once an attack of angina occurs, it should be taken under the tongue in time, and go to the hospital for specific diagnosis and treatment.