Copyright © 1982 by the European Society of Cardiology.
© 1982 by The European Society of Cardiology
Double ventricular response in dual AV nodal pathways mimicking supraventricular as well as ventricular tachycardia

Kerckhoff-Clinic Bad Nauheim, West Germany
Received 13 February 1981; revised 6 June 1981; .
Requests for reprints to: PD Dr H. Neuss, Kerckhoff-Klinik, Benekestrasse 68, 6350 Bad Nauheim, West Germany.
Abstract
Supraventricular tachycardias confined to the AV junction are usually thought to be due to reentry using a slow and a fast conducting pathway. In the case presented, a marked difference of conduction velocity in dual AV nodal pathways and retrograde block in the slow conducting pathway caused a ventricular double response to a single atrial depolarization. At a critical heart rate this phenomenon occurred in a bigeminal fashion, mimicking supraventricular as well as ventricular tachycardia.
Key Words: Dual AV nodal pathways double ventricular response tachycardia concealed conduction