Usefulness of transesophageal echocardiography for transcatheter closure of ostium secundum atrial septum defect with the amplatzer septal occluder.

Background: Transcatheter closure of ostium secundum atrial septum defect (ASDII) using the new self-centering occluder, Amplatzer Septal Occluder (ASO), has been well developed in recent years. We describe the importance and role of transesophageal echocardiography (TEE) in the selection and closure of such defects.

Methods: Thirty patients referred for transcatheter closure of ASDII by ASO were enrolled in this study.