fig20
![Echocardiography: an overview - Part III](https://image.oaes.cc/a251030f-17ae-4989-8cbc-3b1df7232f71/4834.fig.20.jpg)
Figure 20. Selected video frames from subcostal long-axis views of the atrial septum, demonstrating a small color flow jet across the patent foramen ovale (PFO; arrow in A), which was enlarged (arrow in B) after balloon atrial septostomy. The jet width is wider, and the flow is laminar after balloon septostomy. Modified from Ref.[14]. LA: Left atrium; RA: right atrium.