Precordial heart disease is usually not self-healing and requires surgical or interventional treatment. However, for ventricular or atrial defects with a caliber of less than 0.5 cm, no treatment is needed, as it will not adversely affect the heart function and growth of the child. However, due to the presence of heart murmur, which has certain impact on future education, employment and marriage, and the surgery is now very mature, some parents still choose surgery due to these social factors. There are also some small defects, such as ventricular defects in the sub-stem area, which are less than 0.5 cm due to their proximity to the aortic valve, and they also require active surgical treatment. Surgery is recommended for children with defects larger than 0.5 cm in caliber.