The sooner the heart bypass surgery is done the better when the indications are met. As the people who are suitable for heart bypass are those who have severe coronary artery blockage or severe angina, the condition itself is very serious, and if bypass surgery is not performed, it will seriously affect daily life as well as the delay of the disease may lead to irreversible changes in the heart organism. Cardiac bypass surgery is a very effective surgery for the treatment of coronary heart disease, its indications are: 1. People with severe angina and incapacity for work, who have been ineffective in medical treatment. 2. Coronary artery stenosis of more than 50% in the main stem of the coronary artery, stenosis of more than 75% stenosis in the branch vessels, and distal vessel diameter of more than 1.5mm and patency by coronary angiography. 3. People with significant stenosis in the main stem or angina after myocardial infarction, complicated by left ventricular wall tumor, ventricular septal defect, and valvular damage by coronary angiography. Therefore, once the indications are met, it is recommended that bypass surgery be performed as soon as possible to avoid delay and irreversible consequences. It is recommended to follow the doctor’s instructions.