Successful surgery for congenital atrial septal defect can correct the deformity, and the enlarged heart can gradually recover or even return to normal size. Atrial septal defect causes abnormal blood shunting in the right atrium. In the early stage, there may be no obvious clinical symptoms and the diagnosis needs to be confirmed by heart murmurs. However, as the disease progresses there is a decrease in activity tolerance and an increase in the volume of the right ventricle, requiring septal defect repair to be given. Successful surgery will correct the congenital abnormality, improve clinical symptoms, and gradually normalize the heart size. It is recommended that surgery for congenital atrial septal defects be performed as early in childhood or adolescence as possible to improve the success rate. When combined with significant pulmonary hypertension, right-left shunt occurs, it is not suitable for surgery. It is recommended that the surgery be performed in a regular medical institution. There may be a long recovery period after the surgery, and medication and lifestyle adjustments need to be taken as prescribed.