Resumo

CASTANEDA MENDOZA, Roberto et al. Seguimiento a largo plazo en 413 pacientes con vía accesoria atrioventricular sometidos a ablación con radiofrecuencia. Gac. Méd. Méx [online]. 2004, vol.140, n.2, pp.117-121. ISSN 2696-1288.

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. Material and 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.

Palavras-chave : Radiofrequency catheter ablation; supraventricular tachycardia; accessory pathway.