title: Frequency and characteristics of progressive aberrancy during supraventricular tachycardia.
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.
authors.affiliation: Division of Cardiology, Department of Cardiac Electrophysiology, Northwestern University, 251 East Huron, Chicago, IL 60611, USA.
authors.forename: Tim R
authors.initials: TR
authors.lastname: Betts
authors.forename: Jeffrey J
authors.initials: JJ
authors.lastname: Goldberger
authors.forename: Alan H
authors.initials: AH
authors.lastname: Kadish
mesh_terms: D000328:Adult; D000368:Aged; D002037:Bundle-Branch Block / Q000209:etiology* / Q000503:physiopathology*; D002304:Cardiac Pacing, Artificial / Q000009:adverse effects*; D003937:Diagnosis, Differential; D004562:Electrocardiography; D005260:Female; D006329:Heart Conduction System / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D020127:Recovery of Function / Q000502:physiology; D012189:Retrospective Studies; D013612:Tachycardia, Ectopic Atrial / Q000209:etiology* / Q000503:physiopathology*; D013617:Tachycardia, Supraventricular / Q000503:physiopathology* / Q000628:therapy*