After discharge from the hospital, patients with valve replacement need to continue taking medications to further improve and maintain cardiac function. The following drugs are commonly used after discharge from the hospital. 1.Cardiac, diuretics and potassium supplements Generally, they need to be taken for 3 months to 6 months. The main cardiac drugs are digoxin, diuretics are dihydrocoumarol or tachyphylaxis, and potassium supplements are mainly potassium chloride. If your heart rate slows down to less than 60 beats per minute or if you develop arrhythmia, stop taking digoxin and go to the hospital for treatment. Diuretic drugs can be increased or decreased according to the daily urine volume and the presence of lower limb edema as appropriate, and the amount of potassium supplementation should be adjusted according to the laboratory results of blood potassium concentration. 2, anticoagulant drugs Replacement of mechanical flap requires lifelong anticoagulation, and replacement of biological flap requires anticoagulation for 3-6 months, currently mainly using Warfarin anticoagulation. During the anticoagulation period, the prothrombin time and activity should be reviewed regularly, and should be reviewed once in 4-5 days after increasing or decreasing the dose. The dose should not be adjusted too much each time to avoid excessive fluctuation of the measured value. 3, vasodilator drugs Those with high pulmonary artery pressure or high blood pressure should take vasodilator drugs. 4.Antibiotics If there are still respiratory tract, urinary system and skin infections after discharge, adequate amount of antimicrobials should be used for a short period of time to prevent abuse. In addition to the above drug treatment, if the heart beats slowly and weakly after heart surgery, or if the heart rate is slow before surgery and the condition is serious, an epicardial temporary pacemaker is often installed at the time of surgery to prevent slow heart rate or various intractable arrhythmias after surgery. In this way, the surgeon can give medication as needed after the surgery without worrying about the appearance of various arrhythmias. After the pacemaker is installed, it is important to check whether it is working satisfactorily and that the lead is fixed to the chest wall after surgery so that it does not break or become contaminated. Generally, after 1 to 2 weeks of pacemaker placement, the lead can be removed if no use is necessary. If the pacemaker cannot be deactivated yet, a cardiologist should be consulted to clarify whether the heart needs to be placed with a permanent pacemaker. Patients should have their anticoagulant dose adjusted before discharge, and be discharged from the hospital for recuperation after review of echocardiogram, chest X-ray, electrocardiogram and blood biochemical examination, with no pericardial effusion, arrhythmia or electrolyte disturbance.