الفهرس 
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Abstract
Hepatic encephalopathy is a complex neuropsychiatric syndrome that appears to be characterized predominantly by augmented neuronal inhibition. The syndrome is a feature of acute, late-onset or chronic hepatocellular failure. It is generally considered to be a potentially reversible metabolic encephalopathy (Sherlock, 1993). The clinical manifestations range from slight altered mental status to coma and death may occur (Podolosky et al., 1991).
Portal blood flow in man is about 1000 - 120() mi/mm. (Sherlock et al., 1997). Coini et al. (1992) confirms that patients with liver cirrhosis have significantly lower mean value of maximum and mean PVF than those observed in normal subject.
The present work was done to study the change in the portal blood flow in cirrhotic patients with hepatic coma.
Twenty patients who were admitted in Menoufiya University hospital and Liver Institute suffering from liver cirrhosis with hepatic coma grade III, IV were included in this study. They comprised 14 (70%) males and 6 (30%) females. There mean age was 46 ± 10.13 years.