How long can you live with grade 3 heart failure is related to the primary disease of heart failure, age and other factors, if completely cured can survive for a long time, the survival time of heart failure caused by organic heart disease will be shortened. Some patients with heart failure have clear triggers, such as rapid blood transfusion, fluid transfusion, lung infection, etc. If the primary disease can be completely cured, the heart function can be restored to normal, and the survival time will not be affected. In patients with chronic heart failure, survival time is significantly shortened and there is a risk of sudden death, which varies from person to person. The survival time of heart failure patients is also related to age. Young and middle-aged patients who are actively treated and stabilized will have a relatively long survival time, while elderly patients will have a relatively short survival time. Heart failure should be clearly diagnosed and triggered under the guidance of physicians, and timely treatment should be given to prolong the survival time.