The length of life expectancy after cardiac stent implantation at age 50 cannot be estimated. Cardiac stent implantation is an important treatment for coronary artery disease as it can effectively improve coronary artery stenosis, relieve myocardial ischemia symptoms and prevent cardiovascular events caused by coronary artery stenosis. It should be noted that there is a possibility of in-stent restenosis after stent implantation, as well as the possibility of new stenosis in other parts of the coronary artery, all of which carry the risk of recurrence of coronary heart disease. Middle-aged and elderly people over 50 years of age are at risk of developing other systemic diseases in addition to heart disease, some of which may exacerbate the burden on the heart and lead to cardiovascular events. For these reasons, the life expectancy of patients after cardiac stent implantation is affected by many factors and cannot be accurately estimated. Other factors may affect the life expectancy of patients with cardiac stent implantation, which should be considered from various perspectives, and the patient should seek prompt medical attention if there is any maladaptation in order to avoid adverse consequences.