Performing a coronary angiogram requires hospitalization because coronary angiogram is a minimally invasive procedure, any procedure that requires hospitalization. However, at present, coronary angiography is a very mature minimally invasive procedure in clinical practice. If only angiography is performed without stenting, the patient can be discharged from the hospital 24 hours after the procedure. The price of coronary angiography is relatively expensive, about 5000 RMB, and may fluctuate slightly up and down due to regional and hospital level differences, but the difference is not too big. Coronary angiography is one of the gold standards to confirm the diagnosis of coronary atherosclerotic heart disease, and is widely used in clinical practice.