Atrial tachycardia with atypical Wenckebach atrioventricular block after slow pathway ablation.

A case of a patient with dual supraventricular tachycardias, atrioventricular nodal tachycardia, and atrial tachycardia is presented. The former was successfully ablated, whereas the latter was inducible after the ablation of the former, but without clinical importance during follow-up. However, this tachycardia showed interesting characteristics, including dual atrioventricular Wenckebach periodicity, presumably due to multiple slow pathways.