The Doppler Ultrasound signs for portal hypertension are: (1) reduced portal vein blood flow velocity (time-averaged mean vel. < 14-16 cm/s2), with sensitivity and specificity between 80-88% and 80-96%, respectively; (2) portal vein congestion index > 0.08. This parameter, however, is not used routinely, probably due to its being difficult to measure and its lower reproducibility; and (3) measurements of the hepatic arterial Resistive Index are less useful. In the course of Liver cirrhosis, the appearance of clinically significant portal hypertension worsens prognosis and Doppler ultrasound is very useful in evaluating portal hypertension. . astudy showed a significant reverse correlation between the velocities of the main portal vein and fibrous staging of the liver.