Newborns with septal defects are mainly dominated by ventricular septal defects. Newborns with incomplete heart development in the embryonic period form abnormal blood flow traffic, and the septum between the left ventricle and right ventricle is not closed completely, forming the left ventricle pumping blood into the right ventricle through the site of the abnormal defect. Generally, the diameter of the ventricular septal defect is less than 0.5cm, there is no clear clinical symptoms, and with age, some children have the possibility of healing. However, once the ventricular septal defect is large, a series of symptoms will appear, such as shortness of breath, dyspnea, cyanosis, fatigue, recurrent lung infections, and even heart failure, shock, and death, requiring early surgical treatment to repair the defect and restore health.