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Patients and method: 50 patients enrolled in the study at GI department of Hue central Hospital from 6/2013 to 6/2014. The diagnosis of cirrhosis based on the two syndroms: The liver failure and portal hypertension associated with the imaging of sonography or CT scan typically of cirrhosis. Echo Doppler of portal vein and hepatic artery made by the appareil: Doppler HDL 3500 ATL U.S.A; probe 3.5 – 7.5 MHz. Hepatic artery resistance calculate by the formula: RI = . Site of measurement: 2 cm from the confluent of mesenteric and splenic vein, mean value of three times of measurement. Results: - Vmax of portal vein: 18.24 ± 3.09 cm/sec, Vmin: 8.05 ± 1.75cm/second, Vmean: 13.15 ± 2.30 cm/sec. -The mean of Portal vein flow: 609.12 ± 177.77 ml/min, the minimum: 380 ml/min, and the max: 1150 ml/ min. -The mean of hepatic artery resistance: 0.74 ± 0.05; 78% of cirrhosis had high hepatic artery resistnace. - There was the negative relationship between portal vein flow and the degree of cirrhosis by Child – Pugh score (r = - 0.59; p < 0.001). - There was the positive relationship between portal vein flow and the degree of esophageal varix with rs = 0.34; p < 0.05. There was the Midle positive relation with rs = 0.61; p < 0.001. Conclusion: The mean speed of portal vein in cirrhosis 13.15 ± 2.30 cm/second. Vmax of portal vein: 18.24 ± 3.09 cm/second. Vmin of portal vein: 8.05 ± 1.75 cm/second. The portal vein flow: 609.12 ± 177.77 ml/min. The hepatic artery resistance: 0.74 ± 0.05, and there was the negative relationship between portal vein flow and the degree of cirrhosis by Child – Pugh score (r= - 0.59; p < 0.001).

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