fig19

Figure 19. Selected video frames from subcostal views, demonstrating a small inter-atrial opening (arrow in A) which became larger (thick arrow in B) after Rashkind balloon atrial septostomy. The thin arrow in (B) points to the torn flap of the lower margin of the patent foramen ovale. The left and right ventricles are not labeled. Modified from Ref.^[14]. LA: Left atrium; RA: right atrium.