Having a coronary angiogram is not painful and is not something to be overly concerned about. 1. The patient lies flat on the preparation bed in the catheterization laboratory. Before the puncture, anesthetics are administered to the puncture site and its surrounding area to provide adequate anesthesia, and a suitable vessel, either the radial artery or the femoral artery, is found and prepared for the puncture. 2. After the puncture, a sheath is placed over the selected puncture site, and a contrast catheter is passed along the guidewire through the aorta to the aortic valve, where the opening of the coronary artery is located. 3. The balloon, contrast medium, and stent are delivered through the vessel. Following the full injection of contrast medium can be fully developed under the X-ray, through the development of the coronary artery alignment, the presence of structures can be seen. It is recommended that under the guidance of the doctor, reasonable examination, follow the doctor’s instructions standardized treatment.