title: Magnetic electroanatomic mapping of an atrial tachycardia requiring ablation within the coronary sinus.
abstract: We describe a focal atrial tachycardia (AT) originating from the region of the inferoposterior mitral annulus in which ablation at the site of earliest endocardial activation during AT was unsuccessful. Three-dimensional electroanatomic mapping identified the earliest atrial activation within the coronary sinus. Radiofrequency energy delivered at this site within the CS terminated this tachycardia without any complications, suggesting an origin within the CS. To our knowledge, this is the first time a three-dimensional, high-density activation map of such a tachycardia has been reported.
authors.affiliation: Krannert Institute of Cardiology, Department of Medicine, Indiana University School of Medicine, Indianapolis 46202, USA.
authors.forename: Antonio J
authors.initials: AJ
authors.lastname: Navarrete
authors.forename: Rishi
authors.initials: R
authors.lastname: Arora
authors.forename: Joyce E
authors.initials: JE
authors.lastname: Hubbard
authors.forename: John M
authors.initials: JM
authors.lastname: Miller
mesh_terms: D000293:Adolescent; D018780:Body Surface Potential Mapping; D017115:Catheter Ablation / Q000379:methods*; D022062:Electrophysiologic Techniques, Cardiac; D005260:Female; D006801:Humans; D013612:Tachycardia, Ectopic Atrial / Q000175:diagnosis* / Q000601:surgery*