Coronary heart disease patients in the acute stage of ST-segment elevation myocardial infarction (STEMI) or serious complications, non-ST-segment elevation myocardial infarction (NSTEMI) hemodynamic instability, stable angina pectoris (SIHD), severe stenosis of the coronary artery need to be put in a stent, the specific should be in accordance with the doctor’s prescription for treatment. 1. ST-segment elevation myocardial infarction (STEMI): stenting is required within 12 hours of the acute onset of STEMI, or if accompanied by cardiogenic shock or acute heart failure, regardless of the duration of the symptoms and the onset of the disease. 2. Non-ST-segment elevation myocardial infarction (NSTEMI): stenting is also indicated in patients with NSTEMI who are hemodynamically unstable, have failed to respond to medical therapy, and have persistent ventricular tachycardia or ventricular fibrillation. 3. Stable angina pectoris (SIHD): Symptoms can be relieved by stent implantation in patients with uncomplicated stenosis ≥50% of the unprotected left main who are not candidates for coronary artery bypass grafting, as well as in patients with severe stenosis of the coronary arteries ≥70% or a flow reserve fraction of <0.8, and who have intolerable angina pectoris. If coronary artery stenosis or obstruction causes myocardial ischemia that persists, prompt medical treatment is required.