Fig. 2

Sonograms in parasagittal view showing the aberrant course of the ductus venosus. A small vessel is visualized draining into the coronary sinus (CS) near the insertion point of inferior vena cava to the right atrium (a). This vessel (indicated by a hand mark) turns to be the ductus venosus (DV) as it connects with the umbilical vein (UV). The arrows indicate the route of UV-DV connections that cannot be shown by color imaging as the blood flow is vertical to the sound beam (b). The origin and aberrant course of DV (indicted by arrows) could be better shown in another perspective (c) HV: hepatic vein; LA: left atrium; RA: right atrium