There are many patients who are reluctant and afraid to undergo surgery because they are very afraid of heart surgery, thus missing the best time for surgery, and some patients unfortunately suffer from myocardial infarction. However, surgery is still possible after myocardial infarction. Objectively speaking, infarcted myocardial cells cannot be revived, but in general, there is a certain degree of surviving myocardium in the infarct area, and the heart function can still be improved after bypass, and angina can be significantly reduced or even completely disappeared. Of course, surgery without myocardial infarction is the best result because the heart function is good and the risk of surgery is minimal. In addition, if a large myocardial infarction occurs, the entire myocardium of the infarcted area is completely necrotic, thus forming a ventricular wall tumor, which will more seriously affect the heart function, and ventricular wall tumor removal surgery should be performed as soon as possible. Therefore, once the diagnosis of coronary artery disease is clear and surgical bypass is indicated, surgery should be performed as soon as possible, otherwise the long-term effect of surgery will be reduced once myocardial infarction occurs.