People with severe heart failure usually have a shorter life expectancy and a poorer prognosis, with a 1-year mortality rate of about 50% for severe chronic heart failure and a 5-year mortality rate of about 60% for severe acute heart failure. It is recommended that patients seek timely medical attention and take medication regularly under the guidance of a doctor to gain effective control of their condition. Severe chronic heart failure means entering the end stage of the disease. Coronary heart disease and hypertension are the main causes of chronic heart failure, and the 4-year mortality rate of patients with common heart failure is about 50%. People with severe heart failure usually can not carry out any physical activities, and they can have symptoms such as dyspnea, pulmonary edema, hemoptysis, and renal impairment when they are resting. Even after treatment, they still need to be hospitalized for a long time, and their 1-year mortality rate is about 50%. The causes of acute heart failure include severe arrhythmia, acute exacerbation of chronic heart failure, myocardial infarction, etc. Its 5-year mortality rate is as high as 60%, and it may even die in a short period of time if it is not treated in time. People with severe heart failure should avoid physical activity and generally require prolonged and repeated hospitalization, with a hospitalization mortality rate of about 3%, and require treatment to slow the progression of the disease.