fig14

Figure 14. Selected video frames from subcostal views of a neonate with transposition of the great arteries demonstrating patent foramen ovale (PFO). (A) Demonstrates PFO by 2-dimensional imaging. (B, C) show: a left to right (L to R) shunt in (B) and right to left (R to L) shunt in (C) in different phases of the cardiac cycle. Reproduced from Ref.^[13]. LA: Left atrium; RA: right atrium.