title: Characterization of residual coronary sinus-related tachycardia during ablation of longstanding persistent atrial fibrillation.
abstract: OBJECTIVE
  The aim was to characterize the coronary sinus (CS)-related tachycardia that occurred as the last residual arrhythmia and required ablation within the CS or great cardiac vein to restore sinus rhythm (SR) in patients with primary longstanding persistent AF.
  
  
  METHODS
  The study included 23 patients in whom stable SR was restored by ablation inside the vein during the first or repeat ablation.
  
  
  RESULTS
  The 23 subjects represented 23% of the 99 patients in whom SR was restored by ablation. A reentry tachycardia confined to the CS musculature was suggested in 8 (35%) patients, and a peri-mitral reentry circuit was present in 14 (61%) patients. Twenty (87%) patients have remained free from arrhythmia and class I or III antiarrhythmic drugs for 33 +/- 10 (12-53) months.
  
  
  CONCLUSIONS
  A majority of the residual CS-related tachycardias exhibit properties of reentry, one third utilizing the CS musculature as a reentry substrate independent of the atrial myocardium.
authors.affiliation: Department of Cardiology, Heart Center, Hospital Podlesí, Trinec. martin.fiala@gmail.com
authors.forename: M
authors.initials: M
authors.lastname: Fiala
authors.forename: J
authors.initials: J
authors.lastname: Chovancik
authors.forename: D
authors.initials: D
authors.lastname: Wojnarová
authors.forename: V
authors.initials: V
authors.lastname: Bulková
authors.forename: J
authors.initials: J
authors.lastname: Pindor
authors.forename: H
authors.initials: H
authors.lastname: Szymeczek
authors.forename: R
authors.initials: R
authors.lastname: Lábrová
authors.forename: O
authors.initials: O
authors.lastname: Toman
authors.forename: J
authors.initials: J
authors.lastname: Januska
authors.forename: J
authors.initials: J
authors.lastname: Spinar
mesh_terms: D000328:Adult; D000368:Aged; D001281:Atrial Fibrillation / Q000601:surgery*; D018780:Body Surface Potential Mapping; D017115:Catheter Ablation / Q000009:adverse effects / Q000379:methods*; D004562:Electrocardiography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D013616:Tachycardia, Sinus / Q000209:etiology / Q000503:physiopathology*; D055815:Young Adult