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Endoscopy-negative reflux disease: concepts and clinical practice
1Division of Gastroenterology, Department of Internal Medicine, University of Michigan Medical Center, Ann Arbor, Michigan 48109-0362, USA.
The American Journal of Medicine
|October 14, 2004
Summary
Endoscopy-negative reflux disease presents with heartburn symptoms but no visible esophageal damage. About half have abnormal acid exposure (nonerosive acid reflux disease), while others may have functional heartburn due to various causes.
Area of Science:
- Gastroenterology
- Digestive Health
- Esophageal Disorders
Background:
- Endoscopy-negative reflux disease (ENRD) encompasses conditions mimicking gastroesophageal reflux disease (GERD) without endoscopic esophageal injury.
- Patients with ENRD often differ demographically from those with erosive esophagitis, being younger, female, lighter, and without hiatal hernias.
- ENRD is a spectrum including nonerosive acid reflux disease (NERD) and functional heartburn (FH).
Purpose of the Study:
- To delineate the characteristics and potential etiologies of endoscopy-negative reflux disease.
- To understand the diagnostic criteria for nonerosive acid reflux disease and functional heartburn within the ENRD spectrum.
- To explore treatment responses and alternative etiologies for persistent heartburn in ENRD patients.
Main Methods:
- Review of patient demographics and clinical presentations in endoscopy-negative reflux disease.
- Classification of patients based on intraesophageal acid exposure levels.
- Identification of diagnostic criteria for nonerosive acid reflux disease and functional heartburn.
- Assessment of symptom relief with proton pump inhibitor (PPI) therapy.
Main Results:
- Approximately 50% of ENRD patients exhibit abnormal intraesophageal acid exposure, defining them as having nonerosive acid reflux disease.
- Functional heartburn is diagnosed in patients with persistent symptoms, normal acid exposure, and absence of other esophageal motility disorders.
- Other contributing factors to heartburn symptoms in ENRD include motor events, nonacid reflux, minor pH changes, visceral hypersensitivity, and psychological factors.
- Around 50% of ENRD patients achieve complete symptom relief with a 4-week course of proton pump inhibitor treatment.
Conclusions:
- Endoscopy-negative reflux disease is a complex condition with diverse underlying causes.
- Accurate diagnosis requires differentiating between nonerosive acid reflux disease and functional heartburn.
- Persistent symptoms warrant investigation into non-acidic reflux or other structural/functional etiologies.
- Proton pump inhibitor therapy is effective for a significant portion of ENRD patients, but alternative approaches may be needed for refractory cases.