title: Regular wide QRS complex tachycardia during atrial fibrillation in a patient with preexcitation syndrome: a case report.
abstract: We report an unusual case of a relatively regular wide QRS complex tachycardia alternating with periods of an irregular narrow QRS complex tachycardia during atrial fibrillation in a patient with Wolff-Parkinson-White syndrome. Both tachycardias resulted from atrial fibrillation, the wide QRS complex tachycardia being due to 2:1 AV conduction of a type I atrial fibrillation across a posteroseptal accessory AV connection.
authors.affiliation: Department of Medicine, University Hospitals of Cleveland, Ohio 44106, USA.
authors.forename: K
authors.initials: K
authors.lastname: Gatzoulis
authors.forename: M D
authors.initials: MD
authors.lastname: Carlson
authors.forename: N J
authors.initials: NJ
authors.lastname: Johnson
authors.forename: L A
authors.initials: LA
authors.lastname: Biblo
authors.forename: A L
authors.initials: AL
authors.lastname: Waldo
mesh_terms: D000368:Aged; D001281:Atrial Fibrillation / Q000503:physiopathology*; D002304:Cardiac Pacing, Artificial; D004562:Electrocardiography; D004594:Electrophysiology; D006801:Humans; D008297:Male; D011226:Pre-Excitation Syndromes / Q000503:physiopathology*; D013610:Tachycardia / Q000503:physiopathology*