Hepatic veins drain little pressure blood from hepatic sinusoids to the inferior cava vein1. The normal and abnormal wave features of the greater hepatic vessels (hepatic veins, hepatic artery and portal vein) are already described2. At duplex ultrasound, the flow in the hepatic veins is usually pulsatile due to pressure changes in the right atrium. The normal liver is easily adaptable to changes in pressure3, and the triphasic pattern in the right hepatic vein occurs due to reversal flow in the inferior vena cava during systole. Leia o artigo completo.