Definition of Noncirrhotic Portal Hypertension

Functional or mechanical obstruction of the above-described circulation (anywhere from the portal venous system to the right atrium) can lead to portal hypertension. Portal hypertension not caused by liver cirrhosis is termed noncirrhotic portal hypertension, though the two can coexist. Noncirrhotic portal hypertension is categorized according to the level of obstruction of the portal blood flow and its drainage, into pre-, peri- and postsinu-soidal and has a large number of causes. The causes of noncirrhotic portal hypertension are listed in Table 118-1. Normally, the pressure within the portal venous system ranges between 5 and 10 mm Hg. Portal hypertension is defined as an absolute portal pressure of more than 10 mm Hg or as a > 6 mm Hg difference between hepatic and portal venous pressures (PVPs).

Blood Pressure Health

Blood Pressure Health

Your heart pumps blood throughout your body using a network of tubing called arteries and capillaries which return the blood back to your heart via your veins. Blood pressure is the force of the blood pushing against the walls of your arteries as your heart beats.Learn more...

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