The life span of a stent is usually 10 to 15 years, and as technology advances, biodegradable biostents are a major trend in future research and development. The main material of the stent is usually a special alloy that does not decompose, and generally speaking, the stent can be used for more than 10 years after placement. Cardiac stents have been used in clinical practice since the 1980s, mainly to save dying cardiomyocytes in acute myocardial infarction, but also in unstable angina to improve prognosis and quality of life. After stent treatment, in addition to the need for follow-up observation, but also need to take long-term anticoagulant drugs to prevent thrombosis, such as aspirin, clopidogrel, etc., the use of drugs need to be under the guidance of a professional doctor, not unauthorized use of drugs.