Patients and family members who come to the hospital for coronary artery bypass surgery usually decide to have the surgery with the idea and attitude that the patient will be fine after the surgery, and they ignore or do not care about the condition that the doctor has told them before the surgery, and they always think that the doctor is just a formality or scaring the patient. Coronary artery bypass surgery is actually to prevent sudden death and to relieve the patient’s existing symptoms to a certain extent, that is, to improve the quality of life, so that the patient can return to society. It does not mean that after the surgery, all the patient’s symptoms will disappear, nor will myocardial infarction never happen again. This is because myocardial cells cannot be regenerated, that is, dead myocardial cells cannot be revived; at the same time, bypass is to bypass the narrowed large blood vessels, the lesions of the branches of the large blood vessels still exist, and the blood vessels that were not narrowed before bypass will also be narrowed after bypass, especially in the case of patients with three highs, whose three highs are not well controlled.