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Double Ventricular Responses to a Single Atrial Depolarization in a Patient with Dual AV Nodal Pathways
Author(s) -
SAKURADA HARUMIZU,
SAKAMOTO MASAHIKO,
HIYOSHI YASUNAGA,
TEJIMA TAMOTSU,
MOTOMIYA TAKESHI,
SUGIURA MASAYA,
HIRAOKA MASAYASU
Publication year - 1992
Publication title -
pacing and clinical electrophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.686
H-Index - 101
eISSN - 1540-8159
pISSN - 0147-8389
DOI - 10.1111/j.1540-8159.1992.tb02898.x
Subject(s) - medicine , depolarization , nodal , cardiology , dual (grammatical number) , art , literature
Electrophysiological study was performed in a patient with atrioventricular nodal reentrant tachycardia (AVNRT). Double ventricular responses through dual AV nodal pathways were observed by atrial extrastimulus technique followed by initiation of AVNRT. The drfference in conduction time between the slow and fast AV nodal pathways was longer than 320 msec. A ventricular extrastimulus delivered during sinus rhythm, which was not followed by ventriculoatrial conduction, also induced AVNRT. These findings indicated the presence of an antegrade critical delay and retrograde block in the slow AV nodal pathway, criteria necessary for the occurrence of a double ventricular response.