Portal hypertension

Classic presentation and leading syndromes

The clinical presentation of portal hypertension is diverse, yet it is based on the classic triad of signs:

1. Ascites — accumulation of free fluid in the abdominal cavity.
2. Splenomegaly — significant enlargement of the spleen.
3. Varicose veins — localized predominantly in the esophagus and rectum.

The appearance of a patient with advanced cirrhosis is quite characteristic: a thin build is observed, contrasting with a large abdomen due to ascites. Hepatosplenomegaly — the combined enlargement of the liver and spleen — is frequently detected. Flatulence often acts as an early harbinger of ascites development. Examination may also reveal symmetrical lower extremity edema and enhanced vascular pattern on the abdominal skin.

Pathogenesis of main manifestations

The development of symptoms is caused by pronounced hemodynamic and biochemical shifts in the body.

• Splenomegaly and hypersplenism: The splenic vein is one of the main tributaries of the portal vein. Impairment of portal outflow inevitably leads to blood stasis in the spleen, causing its size to increase significantly. This condition is often combined with hypersplenism — a syndrome of enhanced organ function. Laboratory findings manifest it as pancytopenia (anemia, leukopenia, and thrombocytopenia).
• Collateral circulation: To bypass the liver, portosystemic and caval-caval anastomoses are formed. They develop in the lower third of the esophagus, in the hemorrhoidal veins of the rectum, and on the anterior abdominal wall (forming a specific symptom complex — "medusa head" or caput medusae).
• Edematous-ascitic syndrome: Fluid retention in the body occurs not only due to portal hypertension itself, but also as a result of secondary hyperaldosteronism (provoking sodium and water retention) and hypoalbuminemia (reduced plasma oncotic pressure). In grade 1 ascites, visual abdominal enlargement may be absent.

Dependence of clinical features on the etiology of the lesion

The specific features of the syndrome's course are largely determined by the underlying cause of the disease.

Complications of portal hypertension

Portal hypertension syndrome leads to a number of severe, life-threatening conditions:

• Bleeding from esophageal and gastric varices. One of the most formidable complications. It proceeds massively: sudden weakness, dizziness, pallor of the skin, loss of consciousness, a drop in blood pressure, and a rapid, weak pulse occur. Vomiting of fresh blood or altered masses resembling "coffee grounds," as well as melena (black tarty stools), is characteristic.
• Hepatic encephalopathy. Manifestations vary from clinically asymptomatic (minimal) forms to hepatic coma, the terminal stage. A key marker is an alteration in the level and content of consciousness.
• Hepatorenal syndrome. Decreased renal function against the background of cirrhosis, which creates a vicious circle, mutually worsening liver failure and sharply worsening the prognosis.
• Hemorrhagic syndrome. Exacerbates the severity of bleeding due to a drop in the prothrombin index and decreased synthesis of clotting factors in hepatocellular failure (clinically manifested by gum bleeding).
• Infectious and effusion processes. Bacterial peritonitis against the background of fluid accumulation in the abdomen and hepatic hydrothorax (accumulation of effusion in the pleural cavities).
• Gastropathy and colopathy. Portal hypertensive gastropathy is often complicated by the formation of acute ulcers in the upper gastrointestinal tract.

Class and exam questions

What else to study on this topic

• Pathogenesis of hepatic encephalopathy and coma
• Hepatorenal syndrome: mechanisms of the vicious circle
• Portal hypertensive gastropathy and colopathy
• Hypersplenism and mechanisms of pancytopenia development
• Intestinal infarctions in portal vein thrombosis

Prepared by WhiteCoat Pro faculty in accordance with the medical school curriculum. For educational purposes only.