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(Top panel) Illustration demonstrating how the portal vein is anatomically separated from the central venous system by hepatic sinusoids. Made using Biorender®. (Lower panel) illustration demonstrating how the portal vein Doppler waveform changes with increasing right atrial pressure. Pulsatility is the percent change in velocity of the highest and lowest points in the same cardiac cycle. IVC inferior vena cava, RA right atrium
