Patients with severe heart failure will have a series of manifestations at the end of life, as follows: 1. The circulatory system will have obvious chest tightness and shortness of breath, and the patient will be unable to lie down while sitting and breathing, accompanied by chest pain, dyspnea, coughing and coughing. 2. The respiratory system will have obvious coughing of pink foamy sputum, and even the patient will have uncorrectable hypoxemia, and in severe cases, heart failure will be accompanied by respiratory failure. 3. The heart failure system may also have neurological symptoms, such as dizziness, headache, confusion, transient loss of consciousness, coma, lethargy, drowsiness. 4. The digestive system may also have anorexia, nausea, acid reflux, heartburn, and occasional upper gastrointestinal hemorrhage in severe patients at the end of life.