Family Practice Advance Access published online on July 15, 2005
Family Practice, doi:10.1093/fampra/cmi061
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1 Centre for Integrated Health Care Research, University of Durham--Stockton Campus, Wolfson Research Institute, Queen's Campus, University Boulevard, Stockton-on-Tees TS17 6BH, UK
* To whom correspondence should be addressed. Background. Gastro-oesophageal reflux disease (GORD) is a chronic condition affecting up to one-quarter of the Western population. GORD is characterized by heartburn and acid regurgitation, but is reported to be associated with a spectrum of extra-oesophageal symptoms. Objective. The aim of this systematic review was to critically evaluate postulated extraoesophageal symptoms of GORD. Methods. Extra-oesophageal symptoms were identified from population-based studies evaluating their association with GORD (either defined as heartburn and/or acid regurgitation, or diagnosed in general practice). The response of these symptoms to acid-suppressive therapy was investigated using randomized, double-blind, placebo-controlled studies. Pathogenic mechanisms were evaluated using clinical and preclinical studies. Results. An association between GORD and symptoms or a diagnosis of chest pain/angina, cough, sinusitis and gall-bladder disease was evident from three eligible population-based studies of GORD. Randomized placebo-controlled studies (n = 20) showed that acid-suppressive therapy provides symptomatic relief of chest pain, asthma and, potentially, chronic cough and laryngitis. Mechanistic models, based on direct physical damage by refluxate or vagally mediated reflexes, support a causal role for GORD in chest pain and respiratory symptoms, but not in gall-bladder disease. Conclusion. GORD is likely to play a causal role in chest pain and possibly asthma, chronic cough and laryngitis. Further investigation is desirable, particularly for other potential extraoesophageal manifestations of GORD such as chronic obstructive pulmonary disease, sinusitis, bronchitis and otitis. Acid-suppressive therapy is likely to benefit patients with non-cardiac chest pain, but further placebo-controlled studies are needed for other symptoms comprising the extra-oesophageal spectrum of GORD.
Received July 5, 2004
Accepted April 21, 2005
Article
Beyond heartburn: a systematic review of the extra-oesophageal spectrum of reflux-induced disease
2 Outcomes Research, AstraZeneca R&D, S-431 83 Mölndal, Sweden
A. Pali S. Hungin, E-mail: A.P.S.Hungin{at}durham.ac.uk
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