title: [Association between endolymphatic hydrops and benign paroxysmal positional vertigo: coincidence or causality?].
abstract: BACKGROUND
  The aim of this study was to determine the prevalence of benign paroxysmal positional vertigo (BPPV) in patients diagnosed with endolymphatic hydrops (EH) and to analyze whether this association is a factor for poor prognosis in these patients.
  
  
  METHODS
  A retrospective study was carried out in our department among the patients definitively diagnosed as having Ménière's disease according to the criteria of the American Academy of Otolaryngology and BPPV by the usual triggering manoeuvres.
  
  
  RESULTS
  The prevalence of BPPV in our patients with EH was 5.1%. The rate of cure with the repositioning manoeuvres is 90.9%, however success with the first manoeuvre was only 63.36%. Recurrences occurred in up to 22.22%. We found a lower success rate with the first manoeuvre in relation to the rest of the patients with BPPV without EH. This difference is statistically significant (P=0.042).
  
  
  CONCLUSIONS
  We did not find that these patients to have a lower rate of cure with the repositioning manoeuvres or a higher rate of recurrence. But in our protocol the first manoeuvre had a lower success rate than in the rest of the patients.
authors.affiliation: Servicio de Otorrinolaringología, Hospital Clínico de Santiago de Compostela, España. Marcos_Rossi@hotmail.com
authors.forename: Marcos
authors.initials: M
authors.lastname: Rossi Izquierdo
authors.forename: Andrés
authors.initials: A
authors.lastname: Soto Varela
authors.forename: Sofía
authors.initials: S
authors.lastname: Santos Pérez
authors.forename: Torcuato
authors.initials: T
authors.lastname: Labella Caballero
mesh_terms: D018159:Endolymphatic Hydrops / Q000150:complications*; D006801:Humans; D011379:Prognosis; D012189:Retrospective Studies; D014717:Vertigo / Q000150:complications* / Q000453:epidemiology