Mild myocardial ischemia is not necessarily coronary heart disease, in addition to coronary heart disease, there are many factors can cause myocardial ischemia. Myocardial ischemia refers to insufficient blood supply to the myocardium, generally leading to myocardial ischemia is the most important cause of coronary heart disease, coronary artery atherosclerosis, plaque formation leads to narrowing of the vascular lumen, and a series of myocardial ischemia symptoms, the most typical manifestation of angina pectoris, or even myocardial infarction, coronary heart disease diagnosis is generally to do a coronary angiography. Other factors may also cause myocardial ischemia, such as aortic stenosis, severe anemia, myocardial bridge or low blood pressure, etc. In order to find the cause of myocardial ischemia, it should be necessary to do electrocardiograms, blood lipids and blood tests such as blood tests, cardiac angiography. If the patient has mild myocardial ischemia, it is recommended to visit the cardiology department of the hospital in time to find out the cause.