Infants and young children should eat less and eat more, not too much, so as not to increase the burden on the heart. Parents should learn to record the amount of water in and out every day, control the intake of water and increase the elimination of water. Avoid strenuous activity within one month after operation, then gradually increase the activity, and return to school after 3 ~ 6 months. If you feel tired, flustered, short of breath, etc. You should stop your activities and have a rest. If you have cardiac insufficiency such as palpitation, shortness of breath and edema of lower limbs after discharge, you should go to the hospital for help immediately. After discharge, it may be necessary to continue to use diuretics for a period of time. During taking the medicine, you should go to the hospital regularly to observe the curative effect and side effects of the medicine, and adjust the dosage or stop taking the medicine or change the medicine according to the situation under the guidance of a doctor. It is best to review it once a month after discharge.