The atrial and ventricular defects are more severe if the defect is of the same degree. If the defect is not serious, both have the possibility of natural healing. When the defect is less than 3mm, it can basically heal before one year old, if it is less than 5mm, there is a certain possibility of healing, if it is more than 1cm, there is basically no possibility of natural healing, and only surgical repair can be taken, if atrial defect combined with ventricular defect basically cannot heal naturally. Atrial septal defect usually has no clinical manifestations in childhood, and symptoms such as chest tightness and poor endurance will appear only after the age of 20, infection with endocarditis is rare, and heart failure will appear in the late stage, atrial septal defect surgery has good results in the near and medium term. Complications of ventricular septal defect include endocarditis and heart failure, which are relatively more serious than those of atrial septal defect.