fig28
![Echocardiography: an overview - Part II](https://image.oaes.cc/2812ecbd-2d42-493c-8bf9-fab687757096/4657.fig.28.jpg)
Figure 28. Echocardiographic images in subcostal echo projections of the atrial septum illustrating an atrial septal defect (ASD) (arrow in A) before ASD occlusion (A) and placement of a buttoned device across the ASD several hours (B) and 3 months (C) following device deployment. The long arrows in (C) identify the occluder (O) on the left atrial (LA) side and the shorter arrows point out the counter-occluder (Co) on-end in the right atrium (RA). The left ventricle (LV) is marked. Reproduced from Ref.[27].