title: P-wave morphology during right atrial pacing before and after atrial flutter ablation--a new marker for success.
abstract: Fourteen patients with typical atrial flutter underwent pacing from the low lateral right atrium and the proximal coronary sinus in normal sinus rhythm before and after catheter ablation. During low lateral right atrial pacing, a positive change in P-wave morphology in the inferior leads was noted in every patient (n = 12) in whom bidirectional block was achieved; no recurrence was noted in any of these patients.
authors.affiliation: Department of Medicine, University of California, San Francisco, USA.
authors.forename: M H
authors.initials: MH
authors.lastname: Hamdan
authors.forename: J M
authors.initials: JM
authors.lastname: Kalman
authors.forename: H V
authors.initials: HV
authors.lastname: Barron
authors.forename: M D
authors.initials: MD
authors.lastname: Lesh
mesh_terms: D000368:Aged; D001282:Atrial Flutter / Q000503:physiopathology / Q000601:surgery / Q000628:therapy*; D002304:Cardiac Pacing, Artificial; D017115:Catheter Ablation; D004562:Electrocardiography; D006801:Humans; D008875:Middle Aged; D012680:Sensitivity and Specificity