How long a patient can live with stage III cardiac function is mainly related to the patient’s treatment and individual factors, and should be analyzed on a case-by-case basis, and cannot be generalized. Cardiac function stage III refers to the symptoms of cardiac insufficiency that can be caused by lower than usual activities, such as weakness, chest tightness, shortness of breath, dyspnea, telescopic breathing, and even obvious edema of the lower limbs, etc. The patient’s physical activity is significantly limited by cardiac function stage III. If patients do not follow medical advice and take medication regularly, the survival rate may be about 1-2 years. If patients follow the medical prescriptions and take the medication regularly, the condition is better maintained and the 5-year survival rate can reach about 50%-60%. As for patients with cardiac insufficiency, in addition to etiological treatment, medication for symptom control is needed. In addition, patients must adjust their emotions in daily life, pay attention to lifestyle management, get more rest, and have regular follow-up examinations.