Study Status: Recruiting
Recruit Status: Recruiting
Study Type: Observational
Official Title: Occluder Size Determination in Transcatheter Closure of Ostium Secundum Atrial Septal Defect Based on Three-Dimensional Echocardiography Assessment
Brief Summary: The aim of this study is to determine whether three-dimensional tranesophageal echocardiography (3D TEE) assessment of ostium secundum atrial septal defect (ASD II) may be as efficient as two-dimensional (2D) TEE assessment complemented by the balloon-sizing during transcatheter closure of the defect.