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Figure 4a. Monophasic wave pattern in a 42-year-old man with hepatic vein stenosis after LDLT. (a) Sagittal oblique duplex Doppler US image shows monophasic wave pattern of the hepatic vein. (b, c) Images obtained at hepatic venography. (b) Luminal narrowing (arrow) is seen at the anastomotic site of the hepatic veins. The pressure gradient between the hepatic vein and IVC is 12 mm Hg. (c) After stent insertion (arrowheads), the narrowed segment of the hepatic vein has disappeared, and the pressure gradient is 1 mm Hg. (d) Sagittal oblique duplex Doppler US image obtained after stent placement into the hepatic vein shows a triphasic wave pattern.
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