Echocardiography-guided percutaneous closure of oval-shaped secundum atrial septal defects.

Background: An atrial septal defect (ASD) is considered oval-shaped when its shortest diameter is less than 75% of the longest diameter. Research on percutaneous closure of oval-shaped ASDs is limited, with no known reports of non-fluoroscopic closure for this population.

Objective: To assess the effectiveness of non-fluoroscopic percutaneous closure for oval-shaped ASDs.