Narrow Irregular QRS Tachycardia with AV Dissociation: What Is the Mechanism?
Article first published online: 9 NOV 2012
© 2012 Wiley Periodicals, Inc.
Journal of Cardiovascular Electrophysiology
Volume 24, Issue 3, pages 364–366, March 2013
How to Cite
CASTILLO CASTILLO, J., PEÑAFIEL VERDÚ, P., MARTÍNEZ SÁNCHEZ, J. and GARCÍA ALBEROLA, A. (2013), Narrow Irregular QRS Tachycardia with AV Dissociation: What Is the Mechanism?. Journal of Cardiovascular Electrophysiology, 24: 364–366. doi: 10.1111/jce.12026
Section Editor: George J. Klein, M.D.
- Issue published online: 4 MAR 2013
- Article first published online: 9 NOV 2012
- Accepted manuscript online: 3 OCT 2012 06:35AM EST
- Manuscript received 10 September 2012; Revised manuscript received 20 September 2012; Accepted for publication 25 September 2012.
- atrioventricular dissociation;
- atrioventricular node reentry;
- catheter ablation;
- junctional tachycardia;
- supraventricular tachycardia
Arrhythmia Rounds. A 39-year-old woman with no structural heart disease and frequent episodes of sudden onset palpitations was referred for the electrophysiological study. During the study, a slightly irregular narrow QRS tachycardia with AV dissociation was repeatedly induced and spontaneously terminated. Apparently, irregular cycles and termination of the tachycardia were related to the dissociated sinus rhythm: atrial depolarizations timed when the AV junction was refractory were able to reset the tachycardia, while early atrial depolarizations caused its termination. This observation was enough to diagnose the tachycardia mechanism in our case. (J Cardiovasc Electrophysiol, Vol. 24, pp. 364-366, March 2013)