Supraventricular Tachycardia Initiated by Sinus Beats
In the present report, A-V dissociation with concealed retrograde conduction into the A-V node, caused SINUS beats to exhibit antegrade A-V nodal conduction delay sufficient to result in episodes of supraventricular tachycardia (SVT). In this patient, atrial ectopic premature depolarizations were never observed. The primary role of A-V nodal conduction delay in the genesis of paroxysmal SVT is substantiated by this unusual electrophysiological observation.
- Paroxysmal atrial tachycardia
- Atrial reentry
- Atrioventricular conduction
- A-V dissociation
- Ventricular reciprocal rhythm
- A-V refractoriness
- Atrial echoes
- Ventricular echoes
- Reentry phenomenon
- Received April 9, 1971.
- Accepted July 23, 1971.
- © 1971 American Heart Association, Inc.