Portal hypertension.

Abstract:

:Portal hypertension is the main complication of cirrhosis and is responsible for its most common complications: variceal hemorrhage, ascites, and portosystemic encephalopathy. Portal hypertension is the result of increased intrahepatic resistance and increased portal venous inflow, which in turn is the result of splanchnic vasodilatation. Vasodilatation (splanchnic and systemic) and hyperdynamic circulation are hemodynamic abnormalities typical of cirrhosis and portal hypertension. Gastroesophageal varices result almost solely from portal hypertension, although the hyperdynamic circulation contributes to variceal growth and hemorrhage. Ascites results from sinusoidal hypertension and sodium retention, which is, in turn, secondary to vasodilatation and activation of neurohumoral systems. The hepatorenal syndrome represents the result of extreme vasodilatation with an extreme decrease in effective blood volume that leads to maximal activation of vasoconstrictive systems, renal vasoconstriction, and renal failure. Spontaneous bacterial peritonitis is a potentially lethal infection of ascites that occurs in the absence of a local source of infection. Portosystemic encephalopathy is a consequence of both portal hypertension (shunting of blood through portosystemic collaterals) and hepatic insufficiency that result in the accumulation of neurotoxins in the brain. This paper reviews the recent advances in the pathophysiology and management of the complications of portal hypertension.

authors

Garcia-Tsao G

doi

10.1097/00001574-200105000-00012

subject

Has Abstract

pub_date

2001-05-01 00:00:00

pages

281-90

issue

3

eissn

0267-1379

issn

1531-7056

pii

00001574-200105000-00012

journal_volume

17

pub_type

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