Double ventricular responses during extrastimulation of atrioventricular nodal reentrant tachycardia

• Published in: European heart journal Vol. 15; no. 2; p. 285
• Main Authors: Suzuki, F, Tanaka, K, Ishihara, N, Hirao, K, Kawara, T, Hiejima, K
• Format: Journal Article
• Language: English
• Published: England 01.02.1994
• Subjects: Atrioventricular Node - physiopathology; Bundle of His - physiopathology; Cardiac Pacing, Artificial; Electrocardiography; Female; Heart Ventricles - physiopathology; Humans; Middle Aged; Signal Processing, Computer-Assisted; Tachycardia, Atrioventricular Nodal Reentry - physiopathology; Tachycardia, Atrioventricular Nodal Reentry - therapy
• DOI: 10.1093/oxfordjournals.eurheartj.a060490
• ISSN: 0195-668X

In patients with dual atrioventricular (AV) nodal pathways, double ventricular responses to a single atrial depolarization have been shown to occur, but virtually only during atrial pacing in sinus rhythm. We report on a patient with a slow-fast form of AV nodal reentrant tachycardia who exhibited double ventricular responses following extrastimulation during AV nodal reentrant tachycardia. The phenomenon of double ventricular responses during the tachycardia was demonstrated by extrastimulation from the proximal coronary sinus. Retrograde unidirectional block in the slow pathway, and an anterograde effective refractory period that was shorter in the fast pathway than that in the slow pathway, are suggested.