Myocardial ischemia is a series of symptoms caused by myocardial ischemia and hypoxia due to the narrowing of coronary arteries. If the stenosis of the coronary artery continues to worsen or even suddenly occludes, it will cause direct myocardial ischemia and hypoxia, resulting in myocardial necrosis, and myocardial infarction will occur. Once myocardial infarction occurs, go to the hospital immediately, and thrombolytic therapy can be performed within six hours. In addition, treatment with coronary stenting, conservative medication, or even surgical open-heart bypass surgery are also available to relieve the symptoms of myocardial infarction. In addition, after the surgery, you need to take long-term coronary expansion and anticoagulation drugs, such as isosorbide mononitrate dispersible tablets, clopidogrel, aspirin, etc. Only in this way can the patient get well as soon as possible.