title: [Results of percutaneous balloon valvuloplasty in membranous subaortic stenosis].
abstract: OBJECTIVE
  To evaluate the results of percutaneous balloon valvuloplasty (PBV) for membranous subaortic stenosis (MSAS).
  
  
  METHODS
  Seven patients with MSAS were submitted to PBV using the retrograde approach. Hemodynamic and angiographic studies were performed before and after the procedure. The balloon/annulus ratio varied between 0.9 to 1.05.
  
  
  RESULTS
  The systolic gradient (SG) between the left ventricle (LV) and aorta was reduced from 57.8 +/- 11.6 to 22.0 +/- 8.6 mmHg (p < 0.001) and the LV systolic pressure from 154.5 +/- 30.3 to 118.7 +/- 18.4 mmHg (p < 0.001). One patient had arterial occlusion and was submitted to surgical embolectomy and another one showed severe mitral regurgitation combined with aortic insufficiency (AI) and required surgical valvuloplasty. There was no mortality. Four patients had a 11 +/- 10 month follow up: the SG measured by echocardiogram was 34 +/- 7 mmHg and no patient showed worsening of the AI.
  
  
  CONCLUSIONS
  PBV is an effective procedure to reduce the subaortic SG, with an acceptable morbidity and persistence of the results in the short term follow up. PBV is a valid alternative as an initial mode of therapy in the management of patients with MSAS.
authors.affiliation: Instituto Dante Pazzanese de Cardiologia, São Paulo.
authors.forename: C A
authors.initials: CA
authors.lastname: Pedra
authors.forename: M de O
authors.initials: Mde O
authors.lastname: Gusmão
authors.forename: C A
authors.initials: CA
authors.lastname: Esteves
authors.forename: S L
authors.initials: SL
authors.lastname: Braga
authors.forename: V F
authors.initials: VF
authors.lastname: Fontes
mesh_terms: D000293:Adolescent; D001021:Aortic Valve; D001024:Aortic Valve Stenosis / Q000628:therapy*; D002404:Catheterization; D002648:Child; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008566:Membranes
vernacular_title: Resultados da valvoplastia percutânea por cateter balão na estenose subaórtica em membrana.