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[Double ventricular response to a single atrial stimulation caused by simultaneous anterograde conduction through two
P Vitale1, L Santangelo, M S Mayer
1Cattedra di Cardiologia, Seconda Università degli Studi, Napoli.
Cardiologia (Rome, Italy)
|April 1, 1994
Abstract:
In a patient with atrioventricular nodal reentrant tachycardia, during programmed stimulation, an atrial extrastimulus induced a double ventricular response due to a single atrial depolarization, with simultaneous and delayed anterograde conduction through fast and slow pathways, and induced the tachycardia. Pacing-induced type I block involving both pathways put these pathways out of phase, so that the distal conduction system and the ventricle responded to both the fast and slow pathways anterograde impulses.