Postoperative care methods for atrial septal defect mainly include the following: 1. Basic care in the monitoring room, such as vital sign monitoring, wound care, etc. Specialized care includes cardiac function maintenance, cardiac rehabilitation, respiratory management, etc. In addition to back patting and sputum aspiration, respiratory management also includes postural treatment, sputum manipulation and respiratory muscle exercise, etc.; 2. Nutritional support includes fluid and electrolyte management; 3. Patients need to be encouraged to get out of bed early, move early and change their position appropriately to promote the recovery of cardiac function.