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Gastroesophageal Reflux – Causes and Treatment

Gastroesophageal reflux occurs when stomach acid flows back into the esophagus. It commonly causes heartburn and, if chronic, can damage the lining of the esophagus.

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Things worth knowing about "Gastroesophageal Reflux"

Gastroesophageal reflux occurs when stomach acid flows back into the esophagus. It commonly causes heartburn and, if chronic, can damage the lining of the esophagus.

What is Gastroesophageal Reflux?

Gastroesophageal reflux – commonly referred to as GERD (gastroesophageal reflux disease) – is a condition in which stomach acid and sometimes bile repeatedly flows back into the tube connecting the mouth and stomach (esophagus). This backwash (reflux) can irritate the lining of the esophagus. While occasional acid reflux is normal, when it happens frequently it is considered a chronic condition that may require treatment.

Causes

Gastroesophageal reflux is primarily caused by a weakened or malfunctioning lower esophageal sphincter (LES) – a ring of muscle at the bottom of the esophagus. Common contributing factors include:

Hiatal hernia: A portion of the stomach pushes through the diaphragm into the chest cavity, impairing the sphincter mechanism.
Obesity: Excess abdominal pressure forces acid upward into the esophagus.
Pregnancy: Hormonal changes and increased abdominal pressure can weaken the LES.
Dietary habits: Fatty, spicy, or acidic foods, caffeine, alcohol, and smoking all reduce LES tone.
Certain medications: Including calcium channel blockers, benzodiazepines, and nitrates, which relax the sphincter.
Delayed gastric emptying: Food remaining in the stomach longer increases pressure and the likelihood of reflux.

Symptoms

The hallmark symptom is heartburn – a burning sensation in the chest, often occurring after meals or when lying down. Additional common symptoms include:

Acid regurgitation (sour or bitter taste in the mouth)
Difficulty swallowing (dysphagia)
Painful swallowing (odynophagia)
Chronic cough or hoarseness
Sensation of a lump in the throat (globus sensation)
Nausea or bloating

Atypical symptoms such as persistent cough, asthma-like symptoms, or dental erosion may also indicate chronic gastroesophageal reflux.

Diagnosis

Diagnosis is often based on typical symptoms and response to treatment. When the diagnosis is uncertain or complications are suspected, the following tests may be performed:

Upper endoscopy (esophagogastroduodenoscopy): Allows direct visualization of the esophageal lining to detect inflammation, ulcers, or abnormal tissue.
Ambulatory pH monitoring: A 24-hour measurement of acid levels in the esophagus to confirm and quantify reflux episodes.
Esophageal manometry: Measures pressure within the esophagus and evaluates LES function.
Barium swallow X-ray: Used to detect anatomical abnormalities such as hiatal hernia.

Treatment

Lifestyle Modifications

For many patients, symptoms can be significantly improved through lifestyle changes:

Weight loss in overweight individuals
Elevating the head of the bed during sleep
Avoiding eating within 2–3 hours of bedtime
Eliminating trigger foods: alcohol, caffeine, fatty and spicy meals
Eating smaller, more frequent meals
Quitting smoking

Medications

When lifestyle changes are insufficient, medications are prescribed:

Proton pump inhibitors (PPIs): Omeprazole, pantoprazole, and esomeprazole are the first-line treatment, significantly reducing stomach acid production.
H2 receptor antagonists: Such as famotidine, these reduce acid production but are less potent than PPIs.
Antacids: Neutralize existing stomach acid and provide quick relief for mild symptoms.
Prokinetics: Help speed up gastric emptying and may improve LES tone.

Surgical Treatment

For severe or medication-resistant cases, surgery may be considered. The most common procedure is fundoplication, in which the upper part of the stomach is wrapped around the lower esophagus to reinforce the sphincter and prevent reflux.

Complications

If left untreated, chronic gastroesophageal reflux can lead to serious complications:

Reflux esophagitis: Inflammation and erosion of the esophageal lining due to repeated acid exposure.
Esophageal strictures: Scarring that narrows the esophagus and causes difficulty swallowing.
Barrett esophagus: A change in the cells lining the lower esophagus, which increases the risk of esophageal cancer.
Esophageal adenocarcinoma: A rare but serious complication associated with long-standing, untreated reflux.

References

Vakil N. et al. – The Montreal Definition and Classification of Gastroesophageal Reflux Disease. American Journal of Gastroenterology, 2006.
Katz P.O. et al. – ACG Clinical Guideline for the Diagnosis and Management of Gastroesophageal Reflux Disease. American Journal of Gastroenterology, 2022.
Fass R. – Gastroesophageal Reflux Disease. New England Journal of Medicine, 2022.

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