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"gastroesophageal reflux disease"[MeSH Terms] AND management
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Gastroesophageal Reflux Disease (GERD)
Definition
GERD is the most common benign gastroesophageal disorder, defined as a condition where gastric contents reflux into the esophagus causing troublesome symptoms and/or complications. It represents an imbalance between the transdiaphragmatic pressure gradient and the valve mechanism at the esophagogastric junction (EGJ).
— Sabiston Textbook of Surgery, p. 1699
Pathophysiology
The Antireflux Barrier
The EGJ valve mechanism has five components:
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Lower Esophageal Sphincter (LES) — 3–4 cm of smooth muscle creating a sustained high-pressure zone. A defective LES (hypotensive or short intraabdominal length) is the most common finding. Transient LES Relaxations (TLESRs) — inappropriate, prolonged relaxations unrelated to swallowing — are also a major mechanism of reflux.
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Diaphragmatic Crura — external pinching of the esophagus at the EGJ during increased abdominal pressure.
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Angle of His — the acute angle between esophagus and gastric fundus; acts as a barrier against refluxate.
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Gubaroff Valve — mucosal fold at the EGJ acting as a cushion keeping the area closed.
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Intraabdominal Esophagus — compressed by positive abdominal pressure, contributing to the valve mechanism.
— Sabiston Textbook of Surgery, pp. 1699–1700
Conditions Causing EGJ Incompetence
| Mechanism | Examples |
|---|---|
| ↑ Abdominal pressure | Obesity (central fat distribution), pregnancy, heavy weight training |
| ↓ Thoracic pressure | COPD, obstructive pulmonary disease, professional singers/glass blowers |
| Defective valve | Hiatal hernia (most common) — disrupts intraabdominal esophageal length, obtuses angle of His, pressurizes herniated gastric pouch |
Drugs that reduce LES pressure: Calcium channel blockers, theophylline, nitrates, anticholinergics, opioids, tricyclic antidepressants, PDE5 inhibitors, benzodiazepines, alcohol.
— Sabiston Textbook of Surgery, p. 1700; Sleisenger & Fordtran's GI and Liver Disease, p. 194
Symptoms
Typical (Esophageal) Symptoms
- Heartburn (pyrosis) — burning sensation starting inferiorly, radiating retrosternally toward the neck; most common within 1 hour after meals, aggravated by lying down, bending, straining
- Regurgitation — effortless return of bitter/acidic fluid or food into the mouth; more common at night or on bending; indicates more severe disease
- Waterbrash — sudden flooding of the mouth with clear salty saliva (vagally mediated salivary gland reflex, not regurgitated material)
- Dysphagia — may signal underlying motility disorder, peptic stricture, or obstructing lesion; always warrants investigation
- Chest pain / odynophagia
Symptoms of heartburn and regurgitation confer ~70% sensitivity and specificity for a diagnosis of GERD. — Harrison's Principles of Internal Medicine, 22nd Ed.
Atypical / Extraesophageal Symptoms
- Chronic cough
- Laryngitis / hoarseness
- Asthma / wheezing
- Globus sensation / throat clearing
- Dental erosions
- Non-cardiac chest pain
— Cummings Otolaryngology; Clinical Gastrointestinal Endoscopy 3e
Alarm Features (require urgent endoscopy)
- Dysphagia / odynophagia
- Unintentional weight loss
- GI bleeding / iron-deficiency anemia
- Age >45–50 with new onset symptoms
- Refractory symptoms despite PPI
Diagnosis
Empirical PPI Trial
The simplest first step. A 4–8 week high-dose PPI trial (e.g., omeprazole 40–80 mg/day) is used as both a diagnostic and therapeutic measure. Symptom resolution followed by recurrence upon discontinuation establishes GERD. Sensitivity 68–83%, but limited specificity (~54%).
Upper Endoscopy (EGD)
- Standard for documenting esophagitis grade, complications, and excluding other diagnoses
- Only 20–60% of patients with abnormal pH testing have visible esophagitis — so a normal EGD does not exclude GERD
- Sensitivity ~50%, Specificity 90–95%
- Graded by Los Angeles (LA) Classification: A (small breaks <5 mm), B (breaks >5 mm), C (>75% circumference), D (circumferential)
Ambulatory pH Monitoring (24-hour or 48-hour wireless Bravo capsule)
- Gold standard for confirming pathological acid exposure
- Measures DeMeester score and % time pH <4
- Catheter-based or wireless (Bravo)
- Essential if endoscopy is normal but symptoms persist, or before antireflux surgery
Combined pH-Impedance Monitoring
- Detects non-acid and weakly acid reflux events in addition to acid reflux
- Best for patients on PPIs with persistent symptoms
Esophageal Manometry (High-Resolution Manometry)
- Does not diagnose GERD directly, but identifies:
- Hypotensive/short LES
- Esophageal motility disorders (achalasia, IEM) that may contraindicate full fundoplication
- EGJ type (separation of LES and diaphragm pressures = hiatal hernia)
- Mandatory before antireflux surgery
Barium Swallow
- Identifies hiatal hernia, strictures, mucosal rings
- Not diagnostic for GERD, but useful for anatomical assessment pre-surgery
— Sleisenger & Fordtran's GI and Liver Disease, p. 1413–1427; Sabiston Textbook of Surgery, pp. 1662–1665
Complications
| Complication | Notes |
|---|---|
| Erosive Esophagitis | ~20–60% of GERD patients on endoscopy |
| Peptic Stricture | Chronic inflammation → fibrotic narrowing; presents as dysphagia |
| Barrett's Esophagus | Metaplastic replacement of squamous by specialized intestinal epithelium (SIM with goblet cells); occurs in ~5–15% of GERD patients; major precursor to adenocarcinoma |
| Esophageal Adenocarcinoma | Barrett's carries ~125-fold increased risk vs. general population; progression via dysplasia (LGD → HGD → adenocarcinoma) |
| Respiratory complications | Aspiration pneumonia, chronic cough, asthma exacerbation, pulmonary fibrosis |
— Goldman-Cecil Medicine, p. 2035; Sabiston Textbook of Surgery
Treatment
Step 1: Lifestyle Modifications
- Weight loss (most effective intervention, especially for central obesity)
- Elevation of head of bed (6–8 inches)
- Avoid late-night meals (no food 3 hours before bed)
- Dietary triggers: reduce fatty foods, chocolate, citrus, tomato-based foods, onions, coffee, alcohol, carbonated beverages
- Smoking cessation
- Avoid tight-fitting clothing
Step 2: Medical Therapy
Antacids (e.g., calcium carbonate/Tums)
- Rapid but short-lived symptom relief
- Not effective for esophagitis healing
H₂-Receptor Antagonists (e.g., famotidine, ranitidine)
- Useful for breakthrough symptoms
- Limited by tachyphylaxis with repeated dosing
- Less potent than PPIs
Proton Pump Inhibitors (PPIs) ← First-line pharmacotherapy
- Most potent antisecretory agents; highest rates of symptom control and esophagitis healing
- Dose: Start once daily (30–60 min before breakfast); escalate to twice daily for partial response
- Duration: 4–8 week initial trial; many patients require long-term therapy
- All PPIs (omeprazole, lansoprazole, pantoprazole, rabeprazole, esomeprazole) are equally effective at equivalent doses
- Adverse effects of long-term PPI use: ↑ risk of C. difficile infection, community-acquired pneumonia, chronic kidney disease worsening; possible ↑ risk of osteoporosis, hypomagnesemia (uncertain evidence)
AGA recommends 4–8 week PPI trial, once-daily dosing, with possible escalation to twice-daily for partial response.
Step 3: Surgical Management
Indications for antireflux surgery:
- Refractory to maximal medical management
- PPI intolerance / patient preference to avoid long-term medications
- Significant regurgitation not controlled by PPIs (PPIs reduce acid but not volume reflux)
- Complications (e.g., aspiration, Barrett's progression)
Preoperative workup (mandatory 4 tests before surgery):
- EGD — exclude malignancy, confirm esophagitis, assess for Barrett's
- Ambulatory pH monitoring — confirm pathological acid exposure
- Esophageal manometry — exclude achalasia; assess motility
- Upper GI barium series — define anatomy, identify hiatal hernia
Surgical Procedures:
| Procedure | Description | When Preferred |
|---|---|---|
| Nissen Fundoplication (360°) | Complete wrap of gastric fundus around distal esophagus | Standard; normal motility |
| Toupet Fundoplication (270° posterior) | Partial posterior wrap | Dysmotility / IEM |
| Dor Fundoplication (180° anterior) | Partial anterior wrap | Often combined with Heller myotomy |
| Roux-en-Y Gastric Bypass | Eliminates reflux via bypass anatomy | Obese patients (BMI >35) |
Approach: Laparoscopic or robotic (standard). Open surgery reserved for complex revisions.
Outcomes: Patient satisfaction ~90% after laparoscopic Nissen or Toupet; durable symptom control with objective decrease in acid exposure. Multisociety 2023 guidelines favor partial over complete fundoplication (less dysphagia, gas bloat; conditional recommendation).
Complications of fundoplication:
- Dysphagia — up to 50% in first few months, usually self-limited; persistent >3 months requires barium swallow
- Gas bloat syndrome — inability to belch; more common after Nissen than partial wrap
- Wrap herniation — fundoplication herniates into mediastinum; may require revision
- Perioperative mortality ~0.1%
— Sabiston Textbook of Surgery, pp. 1714–1720
Endoscopic Therapies
- LINX device — magnetic sphincter augmentation; small ring of magnetic beads placed around LES laparoscopically; reversible; good for patients without hiatal hernia
- Transoral Incisionless Fundoplication (TIF) — endoscopic reconstruction of the valve; less invasive but less durable
- Stretta procedure — radiofrequency ablation of LES; controversial efficacy
GERD and Barrett's Esophagus — Surveillance
- Confirmed Barrett's without dysplasia: upper endoscopy every 3–5 years
- Low-grade dysplasia: every 6–12 months or ablation
- High-grade dysplasia: endoscopic ablation (radiofrequency ablation / RFA is preferred) or esophagectomy
- EET (Endoscopic Eradication Therapy) with RFA is the standard of care for dysplastic Barrett's
Summary Table
| Feature | Detail |
|---|---|
| Most common symptom | Heartburn + regurgitation |
| First-line Dx in uncomplicated GERD | Empirical PPI trial |
| Gold standard for acid exposure | 24-hour ambulatory pH monitoring |
| First-line pharmacotherapy | PPIs (equally effective at equivalent doses) |
| Indications for surgery | PPI failure/intolerance, significant regurgitation, patient preference |
| Standard antireflux surgery | Laparoscopic Nissen or Toupet fundoplication |
| Most feared complication | Esophageal adenocarcinoma via Barrett's |
Sources:
- Sabiston Textbook of Surgery, 21st Ed., pp. 1699–1720
- Sleisenger and Fordtran's Gastrointestinal and Liver Disease, pp. 194–197, 1413–1427
- Harrison's Principles of Internal Medicine, 22nd Ed. (2025)
- Goldman-Cecil Medicine, p. 2035
- Clinical Gastrointestinal Endoscopy, 3rd Ed.
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