Figure 1
From: Three-dimensional transesophageal echocardiography of the atrial septal defects
A partially occluded OS ASD with an Amplatzer® device as is seen from a 3D TEE study (left side view). One extension of the defect toward it's superior edge (1) is not covered by the device. This irregularities in the shape may be overlooked in 2D images. 2.- Amplatzer® device as seen in photography and in 3D TEE study; 3.- Mitral ring; 4.- Left ventricle outflow tract.