title: Use of valve surgery in Canada.
abstract: BACKGROUND
  To date, although clinical databases have been used to report on single centre or regional valve surgery outcomes, neither clinical nor administrative data have been used to examine rates of valve surgery use across large geographical regions. The objective of the present study was to use administrative data to evaluate use of valve surgery over time and across Canada.
  
  
  METHODS
  All cases of aortic valve replacement (AVR), mitral valve replacement (MVR), mitral valve repair (MV repair), combined AVR and coronary artery bypass grafting (CABG), and combined MVR/MV repair and CABG between fiscal years 1994/95 and 1999/2000 were identified using hospital discharge abstract data obtained from the Canadian Institute of Health Information. Age- and sex-adjusted rates of valve surgery were then calculated by province and by procedure type.
  
  
  RESULTS
  Rates of valve surgery for all procedure types increased between fiscal years 1994/95 and 1999/2000 with the exception of MVR, which remained relatively constant. Significant variation in rates of valve surgery was found between male and female residents. Similar variation was also demonstrated across provinces by year and by procedure type.
  
  
  CONCLUSIONS
  There was a trend toward increased use of valve surgery over time for most procedures. Variation in rates of valve surgery exists across provinces. These results provide a starting point from which to track future trends in use and outcomes for these major procedures.
authors.affiliation: Division of Cardiac Surgery, Faculty of Medicine, Dalhousie University, Halifax, Nova Scotia, Canada.
authors.forename: Ansar
authors.initials: A
authors.lastname: Hassan
authors.forename: Alice M
authors.initials: AM
authors.lastname: Newman
authors.forename: Yanyan
authors.initials: Y
authors.lastname: Gong
authors.forename: Courtney
authors.initials: C
authors.lastname: Kennedy
authors.forename: Karin H
authors.initials: KH
authors.lastname: Humphries
authors.forename: William A
authors.initials: WA
authors.lastname: Ghali
authors.forename: Gregory M
authors.initials: GM
authors.lastname: Hirsch
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D001021:Aortic Valve / Q000601:surgery; D002170:Canada / Q000453:epidemiology; D003131:Combined Modality Therapy / Q000639:trends; D001026:Coronary Artery Bypass / Q000639:trends; D005260:Female; D006349:Heart Valve Diseases / Q000601:surgery; D019918:Heart Valve Prosthesis Implantation / Q000639:trends; D006801:Humans; D008297:Male; D008875:Middle Aged; D008943:Mitral Valve / Q000601:surgery; D016896:Treatment Outcome