X-shaped secundum atrial septal defect seen by 3-dimensional echocardiography: comparison with open-heart view.

![Figure][1] [![Graphic][3] ][3] A 12-year-old child presented with shortness of breath, and a secundum atrial septal defect was diagnosed; it was reported as amendable by percutaneous treatment, with enlargement of the right chambers on transthoracic echocardiography. During the