What is GERD?
GERD (gastroesophageal reflux disease) is a condition that develops when the reflux of stomach contents causes troublesome symptoms and/or complications that adversely affect an individual's well-being. 1
Core Definition
The internationally accepted Montreal consensus definition, adopted by the American Gastroenterological Association, establishes that GERD is distinguished from normal physiologic reflux by the presence of "troublesome" symptoms—meaning symptoms that negatively impact quality of life 1. This is a critical distinction: occasional heartburn that doesn't bother you is not GERD; only symptoms that are frequent or severe enough to be perceived as troublesome qualify as disease 1.
Clinical Presentations
GERD manifests in two main categories 1, 2:
Esophageal Syndromes
- Typical symptoms: Heartburn and regurgitation (approximately 70% sensitive and specific for objective GERD) 2
- Atypical symptoms: Non-cardiac chest pain 2, 3
- With tissue injury: Erosive esophagitis, strictures, Barrett's esophagus, and rarely adenocarcinoma 4, 3
- Without tissue injury: Symptomatic syndromes where symptoms occur without visible esophageal damage
Extra-esophageal Syndromes
- Chronic cough, dysphonia (voice changes), sore throat, and globus sensation 2
- These have established or proposed associations with GERD, though causation is not definitively proven 1
Important Distinction: GERD vs. Episodic Heartburn
The key differentiator is the word "troublesome" 1. If heartburn occurs infrequently or with insufficient severity to bother the patient (after being reassured of its benign nature), it does not meet the definition of GERD. This prevents overdiagnosis and overtreatment of normal physiologic reflux.
What GERD is NOT
Functional heartburn does not fit the Montreal definition of GERD 1. This is an important clinical distinction—patients with functional heartburn have symptoms without objective evidence of pathologic reflux and require different management approaches, including neuromodulation and behavioral therapy 2.
Prevalence and Impact
GERD affects more than 30% of U.S. adults with at least weekly symptoms, making it one of the most common disorders in primary care 2, 4. The global prevalence is high and increasing 5, with significant impact on health-related quality of life and healthcare resource consumption 3.