Hello, congenital atrial septal defect, check regularly after operation. Generally, 1-3 weeks is the most prone period for residual defect after congenital heart disease surgery, that is, the high incidence of secondary residual fistula. Keep the room at a suitable temperature and keep the air circulating. Pay attention to rest, live regularly, avoid strenuous exercise and ensure children's adequate sleep within 3 months after congenital heart disease surgery. Prevent respiratory tract and skin infections within 3 months after discharge. Choose foods with high nutritional value and easy digestion, eat less and eat more meals, don't overeat, and don't overeat, so as not to increase the burden on the heart. Some patients with congenital heart disease should take cardiotonic diuretics for a long time according to the doctor's advice, and can't stop or reduce the dosage without authorization. Once the condition changes, remember to follow up in time to prevent accidents. I hope my answer is helpful to you, and I wish you health and happiness.