title: Abnormal acid reflux in asthmatic patients in a region with low GERD prevalence.
abstract: BACKGROUND
  A high prevalence of gastroesophageal reflux disease (GERD) in asthmatic patients has been reported from North America and Europe. However, only a few data from Asia are available. This study evaluated the incidence of abnormal gastroesophageal reflux (GER) in asthmatic patients in Taiwan.
  
  
  METHODS
  Fifty-six consecutive ambulatory patients with clinically stable asthma (41 men and 15 women; age, 57.7 +/- 12.4 years; range, 24 to 74 years) were evaluated prospectively. All patients underwent esophagogastroduodenoscopy, esophageal manometry, and 24-h esophageal pH monitoring.
  
  
  RESULTS
  Twenty-nine patients (51.8%) had abnormal GER, as defined by 24-h esophageal pH monitoring. There were 42 patients without endoscopic evidence of esophagitis, 10 patients with Los Angeles (LA) grade A esophagitis, and 4 patients with LA grade B esophagitis. The esophageal motility function studies revealed 21 patients with normal esophageal motility, 23 patients with ineffective esophageal motility (IEM), and 12 patients with nonspecific esophageal motility disorders other than IEM. Although the lower esophageal sphincter (LES) basal pressure was higher in the patients without GER, the difference was not statistically significant.
  
  
  CONCLUSIONS
  Abnormal GER seems to be a clinically significant problem in asthmatic patients in Taiwan. The most common esophageal motility dysfunction is IEM. However, the status of Helicobacter pylori infection plays no role in abnormal GER.
authors.affiliation: Division of Chest Medicine, Taichung Veterans General Hospital, Taichung, Taiwan, ROC.
authors.forename: Jen-Yuan
authors.initials: JY
authors.lastname: Hsu
authors.forename: Han-Chung
authors.initials: HC
authors.lastname: Lien
authors.forename: Chi-Sen
authors.initials: CS
authors.lastname: Chang
authors.forename: Gran-Hum
authors.initials: GH
authors.lastname: Chen
mesh_terms: D000328:Adult; D000368:Aged; D001249:Asthma / Q000150:complications / Q000453:epidemiology* / Q000503:physiopathology*; D016099:Endoscopy, Gastrointestinal; D049630:Esophageal Sphincter, Lower / Q000503:physiopathology; D004942:Esophagitis, Peptic / Q000453:epidemiology / Q000503:physiopathology; D005260:Female; D005764:Gastroesophageal Reflux / Q000150:complications / Q000453:epidemiology* / Q000503:physiopathology*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008297:Male; D008365:Manometry; D008875:Middle Aged; D015995:Prevalence; D011446:Prospective Studies; D013624:Taiwan / Q000453:epidemiology