Life expectancy is usually not affected after mitral valve replacement. The survival time of patients is related to their physical condition and the type and maintenance of the replacement valve, which is usually more than twenty years. 1. Physical condition: If the patient has suffered from underlying diseases or organic cardiac structural changes such as cardiac hypertrophy before valve replacement, the symptoms will be relieved after valve replacement, but not completely relieved of the disease, and the energy saving will affect the life expectancy, but has nothing to do with the valve replacement. 2. Types of valves and maintenance: artificial valves are divided into mechanical valves and biological valves. Mechanical valves do not have a service life and can be used all the time, but they have to take anticoagulant drugs such as warfarin for life to prevent the formation of blood clots. Biological valves have a service life of about 10 to 15 years, do not need to be anticoagulated all the time, and are usually recommended for replacement in elderly patients. It should be noted that, after mitral valve replacement, care should be taken to maintain the valve, and if any discomfort occurs, go to the hospital in a timely manner for examination and treatment under the guidance of the doctor.