Atrial septal defect accounts for about 20% of all congenital heart diseases. Generally, atrial septal defect has no symptoms in infancy and is detected only through the detection of heart murmur during physical examination. Therefore, if the child grows older, the atrial septal defect may heal on its own, and if it does not heal on its own, it can be treated with surgery early. There are interventional and surgical treatments, and most people have the same life and life expectancy as normal people after the atrial septal defect is compensated in time. Therefore, atrial septal defect is a relatively benign type of congenital heart disease, because if the defect is small, it can survive for a long time to an advanced age, even to 80-90 years old. For large atrial septal defects, medical science is basically more advanced nowadays, and whatever surgical procedure is taken will have no effect on the life expectancy of the child.