Purpose : The purpose of this study was to evaluate the morphologic changes of the injured hepatic acini following ligation of common bile duct and to investigate the pathophysiologic process of hepatic failure and biliary 1 liver cirrhosis in the extrahepatic cholestasls.Materials and Methods : The common bile ducts of 18 rabbits were ligated partially. The rabbits were killed and selective microangiography was carried out with infusion of barium suspension via portal vein 4 to 24 weeks after ligation. Selective microangiography was also carried out in two normal rabbits. Themicroangiographic findings were evaluated and correlated with histopathologic features.Results : The sinusoids of the liver acinus showed distortion, varying degrees of luminal widening ,and irregularities in architecture. Terminal branches of the portal vein (TPV showed increased number of branches, luminal narrowing, tortuosity, distortion, and beaded appearance. Peribiliary plexi were found as thin curvl-linear, barium-filled structures along the wail of the dilated bile duct. The mlcroanglographic findings were well correlated with histopathologic findings. The grades of microangiographic and histopathologic findings were poorly correlated with the duration of the 1 ligation of CBD.Conclusion : Changes in microvasculature of the liver acinus following partial ligation of common bile duct were demonstrated by microangiography. Although the microvascular changes were evoked secondary to the injury, they might have some active roles in the pathophysiologic process in the liver.