Answer :
Final answer:
Portal hypertension is the increase in blood pressure within the portal venous system due to liver disease. It is caused by increased resistance to blood flow, resulting in elevated pressure and collateral circulation.
Explanation:
Portal hypertension is a condition characterized by an increase in blood pressure within the portal venous system. It occurs as a result of liver disease and can lead to various complications. The pathogenesis of portal hypertension involves increased resistance to blood flow, primarily due to fibrosis and scarring of the liver. This increased resistance causes blood to back up and accumulate in the portal vein, leading to elevated pressure and collateral circulation.
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