title: [Long-term follow-up of 413 patients with atrioventricular accessory pathway who underwent radiofrequency catheter ablation].
abstract: OBJECTIVE
  The aim of this study was shown clinical characteristics and follow-up of patients with atrioventricular reentrant tachycardia (AVRT) who underwent radiofrequency catheter ablation (RCA) therapy.
  
  
  METHODS
  From April 1992 to December 1995, 413 patients with AVRT underwent RCA therapy.
  
  
  RESULTS
  Two hundred thirty four men (57%) and one hundred seventy nine women (43%) aged 31.3 +/- 16.3 years were studied. 437 single accessory pathways were found; 24 had multiple accessory pathways. Ablation therapy was successful in 381 accessory pathways. During follow-up of 7 years, AVRT recurred in 51 patients (13%) and in 80% this occurred within the first 3 months after the procedure. 56 patients underwent a second RCA therapy with success in 35 patients (83.5); two reoccurred (5.7%); 365 accessory pathways (83.5) remained without evidence of preexcitation AVRT.
  
  
  CONCLUSIONS
  During follow-up, these patients with successful ablation therapy remained without symptoms. In patients who underwent a second RCA therapy, atrioventricular reentrant mechanism was always present.
authors.affiliation: Departamento de Electrofisiología, Instituto Nacional de Cardiología, Ignacio Chávez.
authors.forename: Roberto
authors.initials: R
authors.lastname: Castañeda-Mendoza
authors.forename: Pedro
authors.initials: P
authors.lastname: Iturralde-Torres
authors.forename: Luis
authors.initials: L
authors.lastname: Colín-Lizalde
authors.forename: Sergio
authors.initials: S
authors.lastname: Kershenovich
authors.forename: Milton
authors.initials: M
authors.lastname: Guevara-Valdivia
authors.forename: Diana
authors.initials: D
authors.lastname: Arteaga
authors.forename: Laura
authors.initials: L
authors.lastname: Rodríguez Chávez
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D017115:Catheter Ablation; D002648:Child; D002675:Child, Preschool; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D013611:Tachycardia, Atrioventricular Nodal Reentry / Q000601:surgery*; D013997:Time Factors