In terms of the number of septal defects, they can be divided into single-port septal defects and multi-port septal defects. 2. From the perspective of septal location and pathogenesis, they can be divided into primary, secondary, jugular sinus, and coronary sinus types. 3. Small defects and giant defects. Generally, once a diagnosis of atrial septal defect is made, the doctor needs to determine the treatment plan according to the atrial septal typing, taking into account the basic conditions of the patient. If a patient has an atrial septal defect that does not heal completely on its own, or if the patient has severe accompanying symptoms such as significant growth abnormalities and decreased activity, surgery is generally recommended.