Whether it is dangerous for an 85 year old to have a stent needs to be judged on its own merits. Cardiac stenting is mainly used to treat heart disease, which carries its own risks, and the more serious the condition, the more dangerous the surgical procedure is. The 85 year old belongs to the senior patients, the physical quality is relatively poor, if at the same time suffers from a variety of underlying diseases, the risk of medical operation is very high. Moreover, there are risks inherent in performing heart surgery, and the exact level of risk is related to the severity of the condition. If the stenosis is simple and limited, the risk during the procedure is relatively low and a stent can be quickly implanted. Some patients may have more complicated conditions, such as left main lesions, and the procedure is more risky, with the possibility of myocardial ischemia and even sudden death during the procedure. Before stenting in elderly patients, it is important to adequately assess their condition, make contingency plans to reduce the risk during the procedure, and have the procedure performed by an experienced physician. Each person’s specific situation is different, and you should consult a specialist for details.