Atrial Septal Defect Size and Rims on Transesophageal Echocardiogram.

Rims and size of atrial septal defect (ASD) are crucial for the success of transcatheter ASD closure. The maximal diameter and dimensions of various rims of the ASD are essential for sizing and optimal placement of the device. We aimed to study the size and rims of ASD in our patients.