title: Noncontact mapping-guided catheter ablation of atrial fibrillation associated with left atrial ectopy.
abstract: We report the use of a novel noncontact mapping system used to perform left atrial mapping and to guide radiofrequency ablation in two patients, each with atrial fibrillation (AF) triggered by left atrial ectopy. A noncontact multielectrode probe and ablation catheter were advanced into the left atrium through a transseptal puncture or a patent foramen ovale. Isopotential mapping delineated the focal origin at the ostium of the right lower pulmonary vein in one patient and close to the ostium of the left upper pulmonary vein in the other patient. The ablation catheter was guided to the target sites using a locator signal. The foci were ablated successfully in both patients. No recurrences of AF were observed during follow-up at 4 and 6 months, respectively.
authors.affiliation: Deutsches Herzzentrum München and I Medizinische Klinik, Klinikum rechts der Isar, Technische Universität München, Munich, Germany. SchneiderM@dhm.mhn.de
authors.forename: M A
authors.initials: MA
authors.lastname: Schneider
authors.forename: G
authors.initials: G
authors.lastname: Ndrepepa
authors.forename: B
authors.initials: B
authors.lastname: Zrenner
authors.forename: M R
authors.initials: MR
authors.lastname: Karch
authors.forename: J
authors.initials: J
authors.lastname: Schreieck
authors.forename: I
authors.initials: I
authors.lastname: Deisenhofer
authors.forename: C
authors.initials: C
authors.lastname: Schmitt
mesh_terms: D001281:Atrial Fibrillation / Q000209:etiology / Q000503:physiopathology* / Q000601:surgery; D018880:Atrial Premature Complexes / Q000150:complications* / Q000503:physiopathology; D018780:Body Surface Potential Mapping / Q000379:methods*; D006328:Cardiac Catheterization; D017115:Catheter Ablation / Q000379:methods*; D015716:Electrocardiography, Ambulatory; D006329:Heart Conduction System / Q000503:physiopathology* / Q000601:surgery; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008297:Male; D008875:Middle Aged; D016896:Treatment Outcome