Coronary angiography and stenting are done at the same time. Coronary angiography is the gold standard for examining large-vessel lesions in the coronary arteries. Coronary angiography generally takes the patient’s right radial artery as the puncture point, places a guide wire and catheter to the root of the aorta, the opening of the coronary artery, and injects contrast to show the vessels of the heart, a process called coronary angiography, which is a method of examining the coronary arteries. If the coronary angiogram indicates a single vessel stenosis in the coronary artery, with a stenosis of 75% or more, stenting is required. Communicate with the family and obtain their consent while the stent is placed in the vessel. If the coronary angiogram suggests a three-branch lesion, coronary artery bypass surgery is recommended. If the patient’s family refuses to perform bypass surgery, coronary stent implantation can also be performed in stages. Generally, one coronary angiogram procedure only deals with lesions in one vessel, avoiding dealing with multiple vessels at the same time, as long thrombosis in the stent can endanger the patient’s life.