When heart failure occurs in the elderly, patients will have typical symptoms, specifically the following: first, dyspnea, from mild to severe symptoms are exertional dyspnea, nocturnal paroxysmal dyspnea, telescopic breathing, coughing, coughing, wheezing, with coughing pink foamy sputum, unable to lie down, patients will also have heavy sweating, irritability, blue lips, etc. If patients have severe If the patient has severe pulmonary stasis, there will be clinical symptoms of blood in the sputum, accompanied by peripheral weakness, dizziness, palpitations, panic, reduced exercise tolerance, and symptoms of impaired kidney function such as oliguria or even anuria. Second, once right heart failure occurs, the patient will also have vascular filling and anger in the jugular veins, gastrointestinal stasis leading to abdominal distention, anorexia, nausea and vomiting. Thirdly, patients will have edema of both feet and legs, which gradually spreads to the upper body and eventually will develop thoracic fluid and ascites.