Fig. 2.

Serial transesophageal echocardiography images of balloon assisted device closure of a large 38.5 mm atrial septal defect with a 42 mm ASD device (A–F). A) Very large ASD measuring 38.5 mm with deficient posterior rim, B) Sizing balloon occluding the defect, C) Device in hour glass shape with either discs in respective atria and waist compressed by inflated balloon, D) Balloon is deflated and waist expands, E) Device in good position snugly holding on after removal of the balloon, F) Device after deployment.