Abstract

ROJEL, Ulises; CUESTA, Alejandro; MONT, Lluís  and  BRUGADA, Josep. Radiofrequency ablation of late ventricular tachicardia in patients with corrected Fallot's Tetralogy. Arch. Cardiol. Méx. [online]. 2003, vol.73, n.4, pp.275-279. ISSN 1665-1731.

We present the cases of two patients with surgical repaired Tetralogy of Fallot and late ventricular tachycardia. In one patient, the ventricular tachycardia had a right bundle branch block pattern, and in the other, a left bundle branch block pattern. In both patients a macroreentrant circuit in the rigth ventricular outflow tract was documented; radio frequency ablation was effective in both cases. This suggests that the morphology of the ventricular tachycardia in these patients could depend of the direction of the circuit into the right ventricular outflow tract and that mapping of this zone allows to localize the appropriate site for effective ablation. (Arch Cardiol Mex 2003; 73:275-279).

Keywords : Ventricular tachycardia; Tetralogy of Fallot; Radiofrequency catheter ablation.