Whether the atrial septal defect can heal by itself is determined by the location and size: 1, the central atrial septal defect within 6-8mm, can continue to observe, especially within 5mm atrial septal defect, there is a great possibility of self-healing. Generally found that newborns have atrial septal defects, mothers do not need to be too anxious, must go to a professional doctor to see the defect in which position, there is no possibility of self-healing; 2, the defect in the center of the atrial septum <5-6mm, the possibility of self-healing is relatively large, mainly because of the position of the defect can be grown on; 3, the neonatal period, 5-6mm atrial defects on the newborn does not have a significant impact on the newborns. Generally speaking, if you find 5-6mm atrial septal defects in newborns, you don't need to be too anxious, follow up closely, observe the size of the defects, and do an ultrasound in about 3 months to see if there is any chance for the defects to be healed by themselves; 4, if you are over 2 years old, and the atrial septal defects don't grow up together, the chance for the defects to be healed by themselves is very small; 5, in addition, you should pay attention to the fact that atrial septal defects that are larger, especially those above 1㎝, the possibility of healing by themselves is almost non-existent, and the defects lead to the bad heart functions, so you need to have an operation as soon as possible. The best time for surgery is within 2 years old.