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Dr. Srinivas Bojanapu
Hepatologist · Liver Transplant · HPB Surgeon

Portal Hypertension

High blood pressure in the portal vein — a dangerous complication of liver cirrhosis that can cause life-threatening bleeding from variceal rupture. Early recognition and management saves lives.

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What Is Portal Hypertension?

The portal vein is a large blood vessel that carries nutrient-rich blood from the intestines, stomach, spleen, and pancreas to the liver for processing. In a healthy liver, blood flows through easily. In a damaged, cirrhotic liver, increased resistance to blood flow raises pressure in the portal system — this is portal hypertension.

Portal hypertension is defined as a portal pressure gradient >5 mmHg (clinically significant: >10 mmHg; high-risk varices form at >12 mmHg). It is the root cause of most life-threatening complications of cirrhosis.

What Causes Portal Hypertension?

Intra-Hepatic (Most Common — 90% of Cases)

  • Liver cirrhosis — from alcohol, Hepatitis B/C, MASLD, autoimmune disease
  • Schistosomiasis (parasitic infection causing portal fibrosis — common in some regions)
  • Nodular regenerative hyperplasia

Pre-Hepatic (Block Before the Liver)

  • Portal vein thrombosis (blood clot in the portal vein) — often seen in children and young adults
  • Splenic vein thrombosis

Post-Hepatic (Block After the Liver)

  • Budd-Chiari Syndrome — hepatic vein thrombosis
  • Congestive heart failure causing hepatic congestion

Complications of Portal Hypertension

Oesophageal and Gastric Varices

Dilated, fragile veins in the oesophagus/stomach that form as blood seeks alternative pathways. Rupture causes massive, life-threatening haemorrhage — vomiting blood or passing tarry stools.

Ascites

Fluid accumulation in the abdominal cavity. Initially causes bloating and discomfort; advanced ascites causes difficulty breathing and risk of spontaneous bacterial peritonitis (SBP).

Hepatic Encephalopathy

Toxins bypassing the liver (via portosystemic shunts) reach the brain. Causes confusion, personality change, and in severe cases, coma.

Splenomegaly and Hypersplenism

The spleen enlarges as it stores excess blood from the congested portal system. This destroys blood cells — causing low platelets (thrombocytopenia), anaemia, and increased bleeding risk.

Variceal Bleed — Life-Threatening Emergency

Vomiting fresh blood or passing large amounts of black/red stools in a cirrhotic patient is a variceal haemorrhage — a medical emergency requiring immediate endoscopy, IV vasoactive drugs (terlipressin/octreotide), and antibiotic prophylaxis. Call +91 88846 94233 immediately.

Diagnosis

  • Hepatic Venous Pressure Gradient (HVPG): The gold standard — measured during catheterisation. Rarely needed in clinical practice when imaging and endoscopy are diagnostic.
  • Upper GI Endoscopy: Directly visualises oesophageal and gastric varices; allows prophylactic band ligation
  • Ultrasound with Doppler: Assesses portal vein diameter (>13 mm suggests portal hypertension), direction of flow, and portal vein patency
  • CT / MRI abdomen: Evaluates splenomegaly, ascites, portosystemic collaterals, and liver architecture
  • Blood tests: Low platelet count is often the earliest laboratory clue to portal hypertension

Treatment of Portal Hypertension

Beta-Blockers (Primary Prevention)

Non-selective beta-blockers (propranolol, carvedilol) reduce portal pressure and prevent the first variceal bleed. Started when medium/large varices are found on endoscopy.

Endoscopic Band Ligation (EBL)

Rubber bands are placed around varices during endoscopy, causing them to shrink. Used for primary prophylaxis and after variceal bleeding.

TIPSS Procedure

A shunt is placed through the liver via the jugular vein to connect the portal and hepatic veins — reducing portal pressure. Used for refractory ascites and recurrent variceal bleeding. Learn more about TIPSS.

Portal Hypertension Surgery

In selected patients with good liver function and no cirrhosis, surgical shunting or devascularisation procedures can provide long-term control. Dr. Srinivas Bojanapu performs these at Kauvery Hospital.

Ascites Management

  • Sodium restriction (no-added-salt diet: 2g/day)
  • Diuretics: spironolactone ± furosemide
  • Therapeutic paracentesis (drainage) with albumin infusion for tense ascites
  • TIPSS for diuretic-refractory ascites

Liver Transplantation — Definitive Treatment

All interventions for portal hypertension treat complications — they do not cure the underlying cirrhosis. Liver transplantation is the only treatment that resolves portal hypertension definitively by replacing the diseased liver. Transplant evaluation is recommended for patients with recurrent complications or a MELD score >15.

Frequently Asked Questions — Portal Hypertension

Can portal hypertension be cured without transplant?
In non-cirrhotic causes (e.g., portal vein thrombosis), anticoagulation and management of the underlying condition can resolve portal hypertension. In cirrhosis, portal hypertension cannot be cured without liver transplantation — but its complications can be effectively managed with medication, endoscopy, and TIPSS to maintain quality of life.
Is portal hypertension serious?
Yes. Portal hypertension is a leading cause of serious, life-threatening complications in liver disease. Variceal haemorrhage carries a 20–30% mortality risk per episode. Spontaneous bacterial peritonitis (SBP) is fatal if untreated. Active management by a liver specialist is essential.
How is portal hypertension different from regular hypertension?
Regular (systemic) hypertension is high pressure in the arteries throughout the body. Portal hypertension is high pressure specifically in the portal venous system — which has nothing to do with blood pressure readings on the arm. You can have normal blood pressure and severe portal hypertension simultaneously.
What happens if portal hypertension is left untreated?
Untreated portal hypertension progressively leads to variceal bleeding (often fatal), worsening ascites, recurrent infections, hepatic encephalopathy, kidney failure (hepatorenal syndrome), and eventually death. Active surveillance and prophylaxis dramatically reduce mortality.