title: [Long term results of mitral balloon valvuloplasty].
abstract: BACKGROUND
  Mitral balloon valvuloplasty (MBV) is the therapy of choice for the treatment of symptomatic mitral stenosis with suitable anatomy. Although its short and mid-term results are favorable, there is a paucity of information about long-term follow-up.
  
  
  OBJECTIVE
  To assess the late results of MBV.
  
  
  METHODS
  A cohort of 225 patients aged 8 to 20 years who were subjected to a MBV from 1989 to 2001, was studied. All variables at the time of the procedure, short and long-term results and major events during follow-up (new mitral intervention and mortality) were recorded. Uni and multivariate analysis were used to assess prognosis.
  
  
  RESULTS
  The mean follow-up lapse was 13.5 years (range 8 to 20 years). During this period, 88 patients (39.1%) remained event-free and in acceptable functional capacity. Eight percent died, 8% required a second MBV and 43.5% required a surgical mitral valve replacement. A post-procedural area equal or greater to 1.9 cm² was associated with a greater likelihood of free-event survival (log rank test: p = 0.02/Cox proportional regression model: coefficient 0.54, p = 0.04).
  
  
  CONCLUSIONS
  MBV is effective, although there is a high chance of new interventions in the long-term follow-up. A larger post-procedure mitral area is associated with a better prognosis.
authors.forename: Gonzalo
authors.initials: G
authors.lastname: Martínez R
authors.forename: Alejandro
authors.initials: A
authors.lastname: Fajuri N
authors.forename: Samuel
authors.initials: S
authors.lastname: Córdova A
authors.forename: Sandra
authors.initials: S
authors.lastname: Braun J
authors.forename: Eugenio
authors.initials: E
authors.lastname: Marchant D
authors.forename: Eduardo
authors.initials: E
authors.lastname: Guarda S
authors.forename: Nicolás
authors.initials: N
authors.lastname: Veas P
authors.forename: Manuel
authors.initials: M
authors.lastname: Méndez L
authors.forename: Dante
authors.initials: D
authors.lastname: Lindefjeld C
authors.forename: Osvaldo
authors.initials: O
authors.lastname: Pérez P
authors.forename: Alejandra
authors.initials: A
authors.lastname: Flores
authors.forename: Edith
authors.initials: E
authors.lastname: Valenzuela
authors.forename: Alejandro
authors.initials: A
authors.lastname: Martínez S
mesh_terms: D000328:Adult; D000367:Age Factors; D063126:Balloon Valvuloplasty / Q000379:methods* / Q000401:mortality; D004812:Epidemiologic Methods; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D008943:Mitral Valve / Q000000981:diagnostic imaging / Q000601:surgery; D008946:Mitral Valve Stenosis / Q000000981:diagnostic imaging / Q000401:mortality / Q000601:surgery*; D011183:Postoperative Complications; D013997:Time Factors; D016896:Treatment Outcome; D014463:Ultrasonography