En Face View of Atrial Septal Defect by Two-Dimensional Transthoracic Echocardiography: Comparison to Real-Time Three-Dimensional Transesophageal Echocardiography

Two-dimensional TTE can provide en face views of ASDs and their spatial orientations with respect to neighboring structures. This method may provide incremental information to 3D echocardiography in patients with ASDs.