The degree of self-healing of atrial septal defect is related to the growth and development of the child, and there is no uniform data to characterize the area, but it is mentioned in some academic materials that atrial septal defects smaller than 0.5 cm have a relatively higher possibility of self-healing with the growth and development of the child. Once an atrial septal defect is detected, clinical observation is generally recommended if the child is less than one week old and has no obvious signs of discomfort. If the child is more than three years old or if the child has severe conditions such as chest tightness, decreased activity, or abnormal growth, surgery should be considered. At present, the surgical procedure is mainly performed through cardiac catheterization and open-heart surgery. The choice of the specific surgical procedure needs to be judged by the treating physician according to the specific situation of the child.