Everything You Need to Know About Esophageal varices for Step 1

Esophageal varices are one of those GI topics where Step questions love to blend anatomy, pathophys, and emergency management into one scary vignette: a cirrhotic patient with massive hematemesis. If you can connect portal hypertension → portosystemic shunting → dilated submucosal veins → rupture, you’ll pick up easy points—and avoid classic traps.

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What Are Esophageal Varices?

Esophageal varices are dilated submucosal veins in the lower esophagus (and sometimes proximal stomach) that develop due to portal hypertension, most commonly from cirrhosis. They’re dangerous because they can rupture and cause life-threatening upper GI bleeding.

The anatomy Step expects you to know (portosystemic anastomosis)

• Left gastric vein (portal) anastomoses with esophageal veins → azygos system (systemic)
• Portal blood gets “diverted” into systemic veins → venous engorgement → varices

First Aid cross-reference (concepts):

• Portal hypertension + portosystemic anastomoses
• Upper GI bleed differential and acute management
• Cirrhosis complications (ascites, varices, encephalopathy)

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Pathophysiology: How Portal HTN Creates Varices

Core mechanism

1. Cirrhosis (or another cause) increases resistance to portal flow → portal hypertension
2. Pressure backs up into portal venous tributaries
3. Blood shunts through portosystemic collateral vessels
4. Thin-walled submucosal veins dilate in the distal esophagus
5. Varices can rupture (especially when large or under high pressure)

Why they rupture so catastrophically

• Varices have thin walls and are exposed to:
  • High venous pressure
  • Mechanical trauma (swallowing, reflux)
  • Coagulopathy from liver failure (↓ clotting factor synthesis)

Causes of portal hypertension you should recognize

High-yield association:

• Alcohol use disorder → cirrhosis → portal HTN → varices
• Chronic hepatitis B/C → cirrhosis → varices
• Schistosoma mansoni (portal fibrosis) can cause portal HTN even without classic cirrhosis patterns

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Clinical Presentation (Classic Vignettes)

Unruptured varices

Often asymptomatic until they bleed.

Bleeding varices (the “big one”)

Massive upper GI bleed:

• Hematemesis (bright red blood or “coffee-ground”)
• Melena
• Signs of hypovolemia: tachycardia, hypotension, syncope
• Background of chronic liver disease:
  • Ascites, jaundice, spider angiomas, palmar erythema
  • Splenomegaly, caput medusae
  • Encephalopathy (asterixis)

High-yield trap:
Variceal bleeding is typically painless, unlike some causes of esophagitis-related bleeding.

What about gastric varices?

• Often associated with portal HTN too, but classically linked to splenic vein thrombosis (isolated gastric varices)
• Can bleed massively; management overlaps, but endoscopic approach may differ (e.g., cyanoacrylate injection in some settings)

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Diagnosis: What Tests to Order and When

If actively bleeding: stabilize first, then confirm

Variceal bleed is a clinical emergency. In real life (and on Step), you don’t “work it up slowly.”

Key diagnostic test (after initial resuscitation):

• Upper endoscopy (EGD): confirms varices and allows treatment (banding/sclerotherapy)

Screening in cirrhosis (prevention is tested!)

Patients with diagnosed cirrhosis should undergo screening EGD to look for varices and determine need for prophylaxis.

Helpful supportive findings

• CBC: anemia, thrombocytopenia (hypersplenism)
• Coags: ↑ PT/INR (decreased hepatic synthesis of clotting factors)
• LFT patterns vary
• Ultrasound/CT: signs of portal HTN (splenomegaly, ascites), nodular liver

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Management: Stepwise Treatment You Must Memorize

Acute variceal hemorrhage = “ABCs + 3 early moves”

When a cirrhotic patient is vomiting blood, think:

1. Resuscitate

   • Airway protection if altered/ongoing massive hematemesis
   • 2 large-bore IVs, fluids, PRBC transfusion
   • Correct coagulopathy as indicated (vitamin K if deficiency suspected; FFP/platelets in significant bleeding/coagulopathy)

2. Start vasoactive therapy

   • Octreotide (somatostatin analog) → splanchnic vasoconstriction → ↓ portal venous pressure → ↓ bleeding

3. Start antibiotics

   • Ceftriaxone (common choice) for SBP prophylaxis and to reduce infections that worsen outcomes in GI bleed with cirrhosis

4. Urgent endoscopy

   • Endoscopic variceal ligation (banding) is first-line for esophageal varices
   • Sclerotherapy is less favored but may appear in questions

If uncontrolled bleeding

• Balloon tamponade (temporary bridge; high complication risk)
• TIPS (transjugular intrahepatic portosystemic shunt): reduces portal pressure by creating a channel between portal and hepatic venous circulation

High-yield complication of TIPS:

• Hepatic encephalopathy (less ammonia clearance due to shunting)
• Also: can worsen heart failure via increased venous return

Secondary prevention (after a bleed)

Prevent rebleeding with:

• Nonselective beta-blocker (e.g., propranolol, nadolol, carvedilol)
  • Mechanism: $\beta_1$ blockade ↓ cardiac output + $\beta_2$ blockade → unopposed $\alpha$-mediated splanchnic vasoconstriction → ↓ portal flow
• Repeat band ligation (endoscopic eradication strategy)

Primary prevention (before first bleed)

Depends on variceal size/risk stigmata:

• Nonselective beta-blocker for medium/large varices (commonly tested)
• Or prophylactic band ligation in selected cases

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High-Yield Associations & “Buzz Phrases” (USMLE Gold)

Portal HTN collateral sites (know the triad)

Classic Step vignette

• “Long history of alcohol use” + “hematemesis” + “hypotension” + “stigmata of chronic liver disease”
  → Treat for variceal bleed: stabilize + octreotide + ceftriaxone + EGD banding

“First Aid” style one-liners to remember

• Varices are due to portal HTN, most often cirrhosis
• Octreotide acutely reduces portal pressure
• Nonselective beta-blockers prevent bleeding
• Band ligation treats and prevents recurrence
• TIPS = rescue therapy but increases encephalopathy risk

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How to Differentiate Esophageal Varices from Other Upper GI Bleeds (Common Traps)

High-yield nuance:
Mallory-Weiss can occur in alcohol users too—but the history of repeated retching is the giveaway.

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Rapid Review: What to Do When You See “Cirrhosis + Hematemesis”

Immediate steps (exam-friendly):

1. Stabilize (airway/IV fluids/blood)
2. Octreotide
3. Ceftriaxone
4. Urgent EGD with band ligation
5. If refractory: TIPS (watch for encephalopathy)