Patients with suspected coronary artery disease will need a coronary angiogram to confirm the diagnosis. Prior to this, you will need to undergo routine tests such as cardiac ultrasound, electrocardiogram, X-ray, three routine tests, infectious disease screening, biochemical tests, and coagulation tests before you can have a coronary angiogram, which will take about 1-2 days. After all the routine examinations meet the requirements, the nurse will prepare you for the procedure, prepare the skin, train the bed for defecation and other precautions. After the coronary is completed, if a stent needs to be placed, it will be placed next with the consent of the family or the patient (note: take enough aspirin and clopidogrel before surgery). If your condition is stable, you can go back to the ward directly and you can be discharged from the hospital in 2 to 3 days. After the procedure, the limb on which you received the puncture should be restrained for 24 hours and the wound should not be exposed to water for three days.