There is no such thing as the mildest form of CHD. The severity of CHD should be determined by the patient’s specific degree of defect, clinical symptoms, and the ease of treatment. Clinically, the milder forms of CHD include atrial septal defect, ventricular septal defect and arterial catheterization, etc. However, the severity of these forms of CHD should also be determined in the light of the patient’s specific condition. However, these should be considered in the context of the patient’s specific condition. For example, if there is a congenital atrial septal defect, when the defect is in the middle of the atrial septum and the area of the defect is small, the defect can be plugged through the intervention of placing a biofilm, which is less traumatizing and the condition is relatively mild; however, if the defect is close to the atrial wall or the area of the defect is large, it is necessary to open up the chest and enter the heart to connect to the extracorporeal circulation for surgery, which is traumatizing and the condition is relatively serious. If you are suffering from congenital heart disease, it is recommended to go to an authoritative hospital in time, according to the doctor’s advice and guidance for treatment.