Efficacy of Three Dimensional Transesophageal Echocardiography for Percutaneous Device Closure in Atrial Septal Defect

Background: Three-dimensional echocardiographic image for atrial septal defect (ASD) is useful for evaluation of defect size and shape. The investigators suggested optimal device size using three-dimensional transesophageal echocardiographic image and our formula in previous study.

Purpose: In this study, the investigators seek to predict the correct device size and confirm the accuracy of the formula that we made before device closure in ASD patients.

Inclusion Criteria:

• Age ≥18 year-old
• Susceptible indication for atrial septal defect closure
• Potential candidate for device closure

Exclusion Criteria:

• Poor candidate for device closure: multiple ASDs, ect
• Other heart disease requiring open heart surgery