title: [Double ventricular response to a single atrial stimulation caused by simultaneous anterograde conduction through two atrioventricular nodal pathways].
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.
authors.affiliation: Cattedra di Cardiologia, Seconda Università degli Studi, Napoli.
authors.forename: P
authors.initials: P
authors.lastname: Vitale
authors.forename: L
authors.initials: L
authors.lastname: Santangelo
authors.forename: M S
authors.initials: MS
authors.lastname: Mayer
authors.forename: C
authors.initials: C
authors.lastname: Nave
authors.forename: N
authors.initials: N
authors.lastname: Curcio
authors.forename: A
authors.initials: A
authors.lastname: Iacono
mesh_terms: D001283:Atrioventricular Node / Q000503:physiopathology; D004558:Electric Stimulation; D006325:Heart Atria / Q000503:physiopathology; D006352:Heart Ventricles / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D013611:Tachycardia, Atrioventricular Nodal Reentry / Q000503:physiopathology*
vernacular_title: Duplice risposta ventricolare ad un singolo stimolo atriale dovuta a conduzione anterograda simultanea in due vie del nodo A-V.