1. Surgery: Open-heart surgery is the most common treatment for atrial septal defect, ostium secundum type. During the procedure, the surgeon will make an incision in the chest and then use a device to close the hole in the septum.
2. Catheter-Based Closure: This procedure involves inserting a catheter into a vein in the leg and then threading it up to the heart. A device is then used to close the hole in the septum.
3. Transcatheter Closure: This procedure is similar to catheter-based closure, but instead of using a device to close the hole, a plug is inserted into the hole.
4. Medical Management: In some cases, medications may be prescribed to help manage the symptoms of atrial septal defect,