title: [Reintervention with percutaneous balloon angioplasty in patients with congenital heart disease with left-sided obstructions].
abstract: BACKGROUND
  Left-sided cardiac obstructions represent 15% of congenital heart disease (CHD). The treatment in adults is surgical; however, balloon dilation by interventional catheterization can alleviate the symptoms in pediatric patients to allow them to reach the target height. The aim was to determine the survival and the factors associated with reintervention in patients with CHD with left-sided obstruction treated with balloon angioplasty.
  
  
  METHODS
  A cohort study was conducted in patients aged 4 to 17 years with left-sided heart obstruction (valvular stenosis [VS], supravalvular aortic stenosis [SAS], coarctation of the aorta [CA]) successfully treated with balloon angioplasty. The follow-up was of 10 years and the outcome variable was the restenosis with reintervention criteria. Pediatric stage at the time of the procedure, nutritional status, residual gradient, and presence of genetic syndromes were considered prognostic variables. For statistical analysis, measures of central tendency and dispersion were used. Chi squared was employed in qualitative variables and Kruskal-Wallis in quantitative variables.
  
  
  RESULTS
  We had a total of 110 patients: 40% had CA, 35% VS, and 25% SAS. 39% required reintervention: 80% in SAS, 35% in CA, and 14% in VS.
  
  
  CONCLUSIONS
  The intervention balloon is a stopgap measure that allows patients with left-sided obstructions to reach the target height.
authors.affiliation: Servicio de Cardiopatías Congénitas, Hospital de Cardiología, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Ciudad de México, México. horacioinvestigacion@hotmail.com.
authors.forename: Horacio
authors.initials: H
authors.lastname: Márquez-González
authors.forename: Diana
authors.initials: D
authors.lastname: López-Gallegos
authors.forename: Nataly Alejandra
authors.initials: NA
authors.lastname: Pérez-Velázquez
authors.forename: Lucelli
authors.initials: L
authors.lastname: Yáñez-Gutiérrez
mesh_terms: D000293:Adolescent; D000800:Angioplasty, Balloon; D001017:Aortic Coarctation / Q000401:mortality / Q000628:therapy*; D021921:Aortic Stenosis, Supravalvular / Q000151:congenital / Q000401:mortality / Q000628:therapy; D001024:Aortic Valve Stenosis / Q000151:congenital / Q000401:mortality / Q000628:therapy*; D002648:Child; D002675:Child, Preschool; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D053208:Kaplan-Meier Estimate; D008297:Male; D012008:Recurrence; D016896:Treatment Outcome
keywords: Aortic coarctation; Aortic stenosis; Cardiac catheterization; Congenital heart defects; Supravalvular aortic stenosis