What tests should I do if I suspect I have coronary artery disease? If it is diagnosed, is it better to put stents in internal medicine or to do bypass surgery in surgery? If you suspect you have coronary artery disease, you should not just take any medication, but go to a regular professional hospital, a professional department (cardiology), and the doctor will prescribe you an electrocardiogram, cardiac ultrasound, exercise stress test, nuclear examination, cardiac CT and coronary angiography. It should be emphasized that only coronary angiography is the gold standard for diagnosis, and it is up to the cardiologist to make a judgment on whether it is needed or not, based on your condition. If the diagnosis is clear after coronary angiography, there are five cases as follows: First, there is indeed coronary artery disease, but the degree is not serious and does not require medical stenting or surgical bypass surgery, but only oral medication with diet adjustment and appropriate exercise. Second, the degree of lesion is so great that it cannot be solved by medication alone, so it needs and is suitable for medical treatment by stenting. Third, the extent of the lesion is such that it is not suitable for stenting, and surgical bypass surgery is necessary. Fourth, the degree and scope of the lesion is suitable for medical-surgical collaboration, surgical minimally invasive to build a major arterial bridge with a high long-term rate, and internal medicine doctors in other lesion vessels to put in stents, together to complete the treatment, we call it hybrid surgery. Fifth, the extent and scope of the lesion and other combined conditions, can not be put into the stent and surgical bypass, only rely on drug maintenance, this state is the patient and family, and our doctors do not want to see, therefore, we recommend that we should treat as soon as possible when the diagnosis is clear. As for the patient’s main concern, if the coronary angiography examination clearly shows the severity of the lesion, which is better: stenting, bypass surgery or hybridization technology? How to choose? This is a professional question, and the specific choice needs to be considered by the doctor according to the lesion and other factors such as the patient’s physical condition. It varies from person to person and no specific answer can be given. Even we, doctors, choose the method that is most beneficial to the patient according to the constantly updated guidelines. Our general principle is that, while coronary angiography is done in the internal medicine department, the internal medicine doctor will determine if it is suitable for stenting, and if it is, then stenting will be placed. If it is not suitable, only then will we consider a surgical consultation to see if bypass surgery is appropriate. There are a small number of patients that are suitable for bypass surgery. In conclusion, our advice on this issue is that the patient and family should fully trust the doctor and recognize and respect the doctor’s treatment plan. Only with mutual trust can the best treatment results be achieved.