Whether a cardiac stent should be placed or not depends on the condition of the patient. If the vascular lesion is severe, a cardiac stent is needed to relieve the symptoms or to save the life; if the vascular lesion is mild, a stent is not needed, and medication can be used; if the vascular lesion is very severe, the effect of stent implantation is poor, and stent implantation is not suitable, and surgical bypass grafting is needed. If the coronary stenosis is severe, the patient has obvious clinical symptoms and the effect of medication is poor, most of the patients are considered to have cardiac stent implantation, but stent implantation is not the only way of treatment. If the lesion is more diffuse or involves more than one vessel, coronary artery bypass grafting can be performed. If the lesion is more limited, or if the patient is not suitable for long-term use of drugs such as antiplatelet aggregation, pharmacologic balloon dilatation may be considered. If the patient’s condition is mild, most of the patients choose drug treatment, such as applying anti-platelet aggregation drug aspirin, lipid-lowering and plaque stabilizing drug atorvastatin, and coronary vasodilator drug isosorbide nitrate, and so on. Whether or not cardiac stent implantation is appropriate, it is recommended to follow the advice of the doctor in the department of medicine.