When three stents are placed in the heart, the life expectancy of the patient after the operation depends on the actual situation. If the patient’s condition is not serious and he/she actively cooperates with the doctor for treatment after the operation, the life expectancy may not be affected; if the condition is serious and the patient is combined with other diseases, the life expectancy may be affected, but it is not possible to determine the specific life expectancy. Three stents in the heart means that the patient has three narrowed coronary arteries, and cardiac stenting can help unclog the blood vessels. If the patient actively cooperates with the doctor’s treatment after the operation, and there are no complications such as high blood pressure and high blood fat, and has good daily living habits and a good mental state, his or her health will not be greatly affected, and his or her normal life expectancy may not even be affected. If the patient’s condition develops more seriously and is combined with hypertension, hyperlipidemia, diabetes, etc., and although stenting opens the blocked coronary arteries, the patient develops serious conditions such as myocardial ischemia and heart failure, the prognosis is generally poorer and the patient’s life expectancy may be affected. After cardiac stenting, patients need to undergo regular checkups and insist on standardized treatment with professional doctors. Pay attention to a light diet, regular rest and relaxation, and keep a positive and favorable mindset in order to have a better survival period.