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Frequency and characteristics of progressive aberrancy during supraventricular tachycardia
Tim R Betts1, Jeffrey J Goldberger, Alan H Kadish
1Division of Cardiology, Department of Cardiac Electrophysiology, Northwestern University, 251 East Huron, Chicago, IL 60611, USA.
The American Journal of Cardiology
|September 16, 2003
Abstract:
Progressive aberrancy (defined as beats with QRS duration and morphology between that of sinus rhythm and full aberrancy) occurred in 10 of 32 episodes of atrial pacing in 5 of 11 patients. The episodes resembled fusion beats but were due to bilateral bundle branch delay.