Heart failure means heart failure. Severe heart failure in the senior citizens may result in respiratory distress, jugular venous anger, nausea, vomiting, bilateral lower limb edema, and finally cardiogenic shock, malignant arrhythmia, and intractable heart failure. Generally, heart failure is divided into left heart failure and right heart failure, with similar and different symptoms. 1. Left heart failure: When severe left heart failure occurs in the elderly, the more common symptoms are paroxysmal dyspnea at night, especially nocturnal telangiectatic breathing, coughing with pink frothy sputum, and possibly profuse sweating, irritability, etc. If there is severe pulmonary stasis, there will also Symptoms such as dizziness, palpitations, nausea, vomiting, and scanty urination may occur. If the elderly have high blood pressure, the blood pressure may drop, which may induce cardiogenic shock in serious cases. 2. Right heart failure: When the elderly have severe right heart failure and the disease progresses further, they will have edema of both lower limbs, jugular vein anger, gastrointestinal acid reflux, nausea, vomiting, abdominal distension, anorexia and other symptoms, and the edema of both lower limbs will gradually spread to the upper body. Symptoms such as hydrothorax and ascites may also appear. If the heart failure is persistent, the doctor will give heart-strengthening, diuretic and vasodilator drugs, and if the treatment is not effective, drugs such as sodium nitroprusside can be pumped to maintain the heart function. In addition, the more serious complications of heart failure can induce arrhythmias, including sinus bradycardia, atrial fibrillation, and atrioventricular block, which further aggravate the disease of heart failure.