Atrial septal defects, also known as atrial septal defects, are relatively small, with a diameter of less than 5 mm, and are likely to close or heal spontaneously, usually under observation. For larger defects, interventional and surgical treatments are required. 1. Interventional therapy: the umbrella channel is blocked by the implantation of lower limb vessels, through which the umbrella channel reaches the site of atrial defect and blocks the defect, thus achieving the therapeutic purpose. 2. Surgery: For patients who are not suitable for interventional therapy, surgery can be performed to open the chest in the center, establish extracorporeal circulation, and use patch or pericardial repair to block the defect. For patients with atrial septal defect, do not blindly believe that it can be cured by itself, but go to the hospital for examination in time and choose the treatment method under the guidance of the doctor, so as to avoid delaying the condition and causing adverse consequences.