Reentrant Fascicular Tachycardia with Cycle Length Alternans: Insights into the Tachycardia Mechanism and Origin
Article first published online: 30 JUN 2006
Pacing and Clinical Electrophysiology
Volume 13, Issue 7, pages 900–907, July 1990
How to Cite
TAI, Y.-T., FONG, P.-C., LAU, C.-P., CHOW, W.-H. and CHENG, C.-H. (1990), Reentrant Fascicular Tachycardia with Cycle Length Alternans: Insights into the Tachycardia Mechanism and Origin. Pacing and Clinical Electrophysiology, 13: 900–907. doi: 10.1111/j.1540-8159.1990.tb02127.x
- Issue published online: 30 JUN 2006
- Article first published online: 30 JUN 2006
- Received September 12, 1989; revision January 8, 1990; revision February 20. 1990; accepted March 2, 1990.
- fascicular tachycardia;
- cycle length alternans;
- electrophysiological study
This report details the electrophysiology of a unique case of reentrant fascicular tachycardia in a patient without structural heart disease. Persistent cycle length alternans, with constant fluctuation in alternate RR intervals, occurred during tachycardia. A distinct mode of spontaneous termination of tachycardia was observed. The findings were consistent with the presence of decrementel conduction properties in the tachycardia circuit or decrementel dual functional pathways within one limb of the circuit. These observations provide further evidence in support of a fascicular origin of the tachycardia.