Chronic heart failure survival time varies from person to person and is related to a number of factors that cannot be generalized. Chronic heart failure survival time is related to the severity of heart failure and whether or not the medication is standardized. Usually, if the heart function is grade I or grade II, and the patient is taking medication, it usually has no effect on the life expectancy. If the heart function grade III, IV, physical activity is obviously limited, or even can not be active, resting state can appear symptoms, life expectancy is more affected. According to research statistics, cardiac function class III, IV, five-year survival rate is only about 40%-50%. In addition, if the ultrasound suggests that the ejection fraction is poor, especially below 30% or 25%, etc., sudden cardiac death is more likely. Also, high BNP, or brain natriuretic peptide, is a clinical indication of severe heart failure and higher mortality. Patients with heart failure are advised to take relevant secondary prevention drugs orally on time, and control blood pressure, blood lipids and blood glucose at the same time in order to prolong survival time.