title: [Gastroesophageal reflux disease: an overview].
abstract: BACKGROUND
  Gastroesophageal reflux disease, considered one of the most common digestive diseases in western countries, has been very much studied. The great number of publications in medical literature based upon this issue must be pointed out. However, some of its aspects remain controversial.
  
  
  OBJECTIVE
  To emphasize important topics of the disease and to present a review on the theme. The following topics were reviewed: defi nition, prevalence, clinical complaints, indications and limitations of the major diagnostic methods and medical, surgical and endoscopic treatments.
  
  
  METHODS
  We searched, by internet: selected review articles, consensus, guidelines and systematic reviews with meta-analysis, published in the last 5 years (from 2000 to 2005), in the following data bases: Cochrane Central Register of Controlled Trials (The Cochrane Library) and PubMed. Among lots of papers which were found, we selected nine systematic reviews with meta-analysis, fi ve review articles, fi ve guidelines and four consensus, that dealt with the topics we had decided to review. It must be pointed out that, as it has been observed in our bibliographical references, not only the publications found were taken into account; other relevant ones (some of them published previously to the analyzed time period) were considered in the composition of this present paper.
  
  
  CONCLUSIONS
  Among the 12 conclusions presented, two have to be emphasized: 1. the esophageal multichannel intraluminal impedance has largely contributed to the better knowledge of the gastroesophageal reflux disease and it suggests, when associated with pHmetry (esophageal impedance-pHmetry), as a new gold standard to the gastroesophageal reflux diagnosis and 2: among the gastroesophageal reflux disease symptoms some of them may be considered acid dependents and can usually get good responses to the proton pump inhibitors. Nevertheless, there are also some symptoms which are more dependent on the physical presence of the reflux rather than its acidity. Such symptoms, which do not depend so much on the acidity of the reflux, are not well controlled by the proton pump inhibitors.
authors.affiliation: Disciplina de Cirurgia do Aparelho Digestivo, Universidade de São Paulo, SP. ary.nasi@fleury.com.br
authors.forename: Ary
authors.initials: A
authors.lastname: Nasi
authors.forename: Joaquim Prado P
authors.initials: JP
authors.lastname: de Moraes-Filho
authors.forename: Ivan
authors.initials: I
authors.lastname: Cecconello
mesh_terms: D017097:Electric Impedance; D016099:Endoscopy, Gastrointestinal; D004947:Esophagus / Q000601:surgery; D018662:Fundoplication; D005764:Gastroesophageal Reflux / Q000150:complications / Q000175:diagnosis* / Q000628:therapy*; D006635:Histamine H2 Antagonists / Q000627:therapeutic use; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008365:Manometry / Q000379:methods; D054328:Proton Pump Inhibitors / Q000627:therapeutic use
chemical_list: D006635:Histamine H2 Antagonists; D054328:Proton Pump Inhibitors