title: Basket catheter localization of the origin of atrial tachycardia with atypical morphology after atrial flutter ablation.
abstract: Atrial activation from a site in the low lateral right atrium will typically proceed in a superior direction. We present a case of a low lateral right atrial tachycardia with a surface electrocardiographic P wave morphology that appeared to have an inferiorly directed axis. The tachycardia occurred 2 years after successful atrial flutter ablation. The use of a multipolar basket catheter allowed confirmation of the focal origin of the tachycardia, permitted its rapid localization, facilitated catheter ablation, and provided clues to atrial activation that helped describe the appearance of the P wave.
authors.affiliation: Hospital of the University of Pennsylvania, Electrophysiology Section, Philadelphia 19104, USA.
authors.forename: E
authors.initials: E
authors.lastname: Rodriguez
authors.forename: D
authors.initials: D
authors.lastname: Callans
authors.forename: B
authors.initials: B
authors.lastname: Kantharia
authors.forename: C
authors.initials: C
authors.lastname: Gottlieb
authors.forename: F E
authors.initials: FE
authors.lastname: Marchlinski
mesh_terms: D006328:Cardiac Catheterization / Q000295:instrumentation / Q000379:methods; D017115:Catheter Ablation / Q000295:instrumentation / Q000379:methods; D004562:Electrocardiography; D004566:Electrodes; D006329:Heart Conduction System / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications; D013612:Tachycardia, Ectopic Atrial / Q000473:pathology / Q000503:physiopathology* / Q000628:therapy*; D013616:Tachycardia, Sinus / Q000473:pathology / Q000503:physiopathology / Q000628:therapy