4. List the etiologies of Budd-Chiari Syndrome and describe the Doppler sonographic findings associated with this disorder.
Introduction
The liver is the largest intra-abdominal organ in the human body and it is unique in that it has a duel blood supply, the hepatic artery and the portal vein. On average, approximately two fifths of the blood flow into the liver is from the hepatic artery and three fifths is from the portal vein. The portal vein is the major venous return from the intestines (therefore, the venous blood from the intestines must pass through the liver before it enters the systemic circulation).
