title: Bi-focal atrial tachycardia mimicking atrial fibrillation: fusion and interference between two distinct tachycardias.
abstract: Irregular tachycardias mimicking atrial fibrillation (AF) have previously been described. We report a case of a 60-year-old man with an antiarrhythmic drug-resistant atrial tachycardia (AT) mimicking AF. The tachycardia consisted of two distinct ATs with interference of one repetitive AT with another sustained AT. Radiofrequency (RF) ablation of two distinct right atrial foci eliminated the irregular tachycardia. Although catheter-based pulmonary vein isolation has become a popular therapeutic approach for patients with symptomatic AF, careful evaluation of the intracardiac recordings in the patients undergoing RF ablation for AF is important.
authors.affiliation: Department of Cardiology, Tokyo Women's Medical University, Tokyo, Japan.
authors.forename: Koichiro
authors.initials: K
authors.lastname: Ejima
authors.forename: Morio
authors.initials: M
authors.lastname: Shoda
authors.forename: Kohei
authors.initials: K
authors.lastname: Tanizaki
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Kasanuki
mesh_terms: D001281:Atrial Fibrillation / Q000175:diagnosis*; D017115:Catheter Ablation; D003937:Diagnosis, Differential; D022062:Electrophysiologic Techniques, Cardiac / Q000379:methods; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D013612:Tachycardia, Ectopic Atrial / Q000175:diagnosis* / Q000601:surgery; D016896:Treatment Outcome