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Concealed automaticity from an island of atrial myocardium post cavotricuspid ablation.

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Le Polain De Waroux, Jean-Benoît [UCL] Nattel, Stanley Dubuc, Marc Talajic, Mario Macle, Laurent

We report the case of a patient with paroxysmal atrial fibrillation in whom 2 previous cavotricuspid isthmus (CTI) ablations were performed for recurrent type I counterclockwise atrial flutter. One year after the last CTI ablation, the patient underwent pulmonary vein isolation for AF and reassessment of conduction block in the CTI was performed during the procedure. While mapping the CTI, activations were documented within the CTI that were dissociated from both right atrial and ventricular activity during sinus rhythm and pacing maneuvers. This dissociated activity was confined to a region delimited by the 2 previous ablation lines, the tricuspid annulus and the inferior vena cava. These findings suggest that an island of atrial myocardium with automatic activity was created within the CTI by previous ablation lines.

Document type Article de périodique (Journal article) – Article de recherche
Access type Accès restreint
Publication date 2010
Language Anglais
Journal information "Journal of cardiovascular electrophysiology" - Vol. 21, no.12, p. 1408-9 (2010)
Peer reviewed yes
issn 1045-3873
e-issn 1540-8167
Publication status Publié
Affiliation UCL - (SLuc) Service de cardiologie
MESH Subject Adult ; Atrial Fibrillation ; Catheter Ablation ; Electrocardiography ; Heart Conduction System ; Humans ; Male ; Myocardium ; Tricuspid Valve
Links
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Bibliographic reference Le Polain De Waroux, Jean-Benoît ; Nattel, Stanley ; Dubuc, Marc ; Talajic, Mario ; Macle, Laurent. Concealed automaticity from an island of atrial myocardium post cavotricuspid ablation.. In: Journal of cardiovascular electrophysiology, Vol. 21, no.12, p. 1408-9 (2010)
Permanent URL http://hdl.handle.net/2078.1/124407