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Portal hypertension is increased pressure in the portal vein that supplies blood to the liver. It can be caused by cirrhosis, thrombosis, congenital diseases, or heart failure. Learn about the signs, complications, and imaging techniques for diagnosis.
Learn about the lobules of liver, the microscopic units of liver tissue that consist of a portal triad, hepatocytes, and a central vein. Find out how the portal triad, composed of blood vessels, bile ducts, and nerve fibers, and the metabolic zones of liver cells are related to liver function and injury.
The hepatic portal system is the system of veins that carries blood from the gastrointestinal tract, spleen, pancreas and visceral fat to the liver. It is responsible for the first-pass metabolism of substances absorbed from food and has clinical significance in portal hypertension and drug metabolism.
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Portal venous pressure is the blood pressure in the hepatic portal vein, and is normally between 5-10 mmHg. Hepatic venous pressure gradient (HVPG) is a clinical measurement of the pressure gradient between the portal vein and the inferior vena cava, and is used to diagnose and monitor portal hypertension.
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