Relationship of echocardiographic, shunt flow, and angiographic size to the stretched diameter of the atrial septal defect.


Stretched diameter of the atrial septal defect (ASD), measured by balloon sizing, is generally used as a guide to the selection of the size of the device utilized for transcatheter closure of the ASD. Balloon sizing is a cumbersome procedure and sometimes requires the use of very large size balloon catheters. Several methods of assessment of ASD size… (More)


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