Atrial septal defect blockage is not harmful to the body. Atrial septal defect is a relatively common congenital malformation of the heart, mainly caused by congenital dysplasia or certain hereditary diseases, as long as in the atrial septal defect occlusion surgery, pay attention to follow the doctor’s instructions for regular review, avoid strenuous activities, because of the advantages of this surgery is no incision, the damage is very small, so the patient’s body does not have much harm. The best time for atrial septal defect blockage surgery is when the patient is around three to five years old, because at this time, the patient’s body’s function development is basically sound, and the size and conditions are more suitable for atrial septal defect blockage surgery, and the success rate is also relatively high. It is recommended that patients should have regular checkups after the surgery, eat a light diet and keep a good attitude to avoid aggravating the condition.