Gastroenterology · Portal Hypertension
The facts most likely to be tested
Esophageal varices are a life-threatening complication of portal hypertension most commonly caused by cirrhosis.
Screening endoscopy (EGD) is indicated for all patients with a new diagnosis of cirrhosis to assess for the presence of varices.
Non-selective beta-blockers (e.g., propranolol or nadolol) are the first-line agents for primary prophylaxis of variceal hemorrhage.
Endoscopic variceal ligation (EVL) is the preferred treatment for secondary prophylaxis or for patients who cannot tolerate beta-blockers.
Acute variceal hemorrhage requires immediate stabilization with fluid resuscitation, octreotide infusion, and prophylactic antibiotics (typically ceftriaxone).
Transjugular intrahepatic portosystemic shunt (TIPS) is the definitive rescue therapy for patients with refractory bleeding despite endoscopic intervention.
Hematemesis in a patient with stigmata of chronic liver disease (e.g., spider angiomata, palmar erythema, ascites) is highly suggestive of esophageal variceal rupture.
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A 54-year-old male with a history of alcohol use disorder presents to the emergency department after vomiting a large amount of bright red blood. Physical examination reveals scleral icterus, palmar erythema, and a distended abdomen with shifting dullness. His blood pressure is 90/60 mmHg and heart rate is 115/min. Laboratory studies show a thrombocytopenia and an elevated INR.
What is the most appropriate initial pharmacologic intervention to reduce portal pressure in this patient?
Octreotide
The patient is presenting with an acute variceal hemorrhage; octreotide is a somatostatin analog that causes splanchnic vasoconstriction, reducing portal venous inflow and pressure.
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Etiology / Epidemiology
Caused by portal hypertension secondary to cirrhosis. Most common in patients with chronic liver disease.
Clinical Manifestations
Presents as hematemesis or melena. Hypovolemic shock is the primary clinical concern.
Diagnosis
Upper endoscopy (EGD) is the gold standard for diagnosis and grading.
Treatment
Octreotide is the first-line pharmacotherapy. Avoid nitrates in hypotensive patients.
Prognosis
High mortality rate; rebleeding is the most significant complication.
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Epidemiology & Etiology
Occurs in ~50% of patients with cirrhosis. The primary driver is increased resistance to portal venous flow, most commonly due to Laennec's cirrhosis (alcohol) or chronic viral hepatitis.
Pertinent Anatomy
Varices form at the gastroesophageal junction where the portal venous system anastomoses with the systemic venous circulation (azygos vein). This collateral circulation is a direct result of portal hypertension.
Pathophysiology
Increased portal pressure (>10 mmHg) leads to the development of portosystemic collaterals. As pressure exceeds 12 mmHg, the risk of rupture increases significantly. The vessel wall thins, leading to massive, painless upper GI hemorrhage.
Clinical Manifestations
Patients present with sudden onset hematemesis or melena. Look for signs of chronic liver disease: spider angiomata, palmar erythema, and ascites. Hypovolemic shock (tachycardia, hypotension) is a life-threatening red flag.
Diagnosis
Upper endoscopy (EGD) is the gold standard for both diagnosis and therapeutic intervention. Screening is recommended for all patients with new-onset cirrhosis. Varices are graded by size: small (<5mm) vs. large (≥5mm).
Treatment
Stabilize with IV fluids and Octreotide (somatostatin analog) to reduce portal pressure. Do not use beta-blockers in acute hemorrhage; use propranolol only for primary prophylaxis. Endoscopic variceal ligation (EVL) is the preferred mechanical intervention.
Prognosis
Acute mortality is high, often exceeding 20% per episode. Rebleeding is common, necessitating long-term management with non-selective beta-blockers and serial surveillance.
Differential Diagnosis
Mallory-Weiss tear: associated with forceful retching/vomiting
Peptic ulcer disease: usually associated with epigastric pain
Esophagitis: typically presents with odynophagia
Dieulafoy lesion: rare, painless, massive arterial hemorrhage
Gastric cancer: associated with weight loss and early satiety