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From there, blood makes its way to the Vena cava, the largest vein in the body to return to the heart. Portal hypertension describes elevated pressure within the portal system, including the portal vein and the tributary veins that drain into it.
The main cause of portal hypertension is cirrhosis. This is a scarring of the liver. It can result from alcohol abuse or a disease, such as hepatitis. Whenever your liver is harmed, it attempts to heal itself. This causes scar tissue to form. Too much scarring makes it harder for your liver to do its job. Other cirrhosis causes include: