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Intra-Atrial Conduction Block Mimicking Atrioventricular Nodal Block After Multiple Catheter Ablation Procedures for Atrial Tachycardia in a Patient with Cardiomyopathy


  • Supported in part by a grant from the Leducq Transatlantic Network.

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Aman Chugh, M.D., Division of Cardiology, University of Michigan Health System, 1500 East Medical Center Drive, Ann Arbor, MI 48109, USA. Fax: 734-936-7026; E-mail:


Intra-Atrial Conduction Block. A 42-year-old woman with a history of cardiomyopathy and multiple ablation procedures for atrial tachycardia developed intra-atrial conduction block that mimicked atrioventricular (AV) nodal block during radiofrequency ablation at the cavotricuspid isthmus. She was treated with atrial pacing (from the coronary sinus), which overcame intra-atrial conduction block and resulted in AV nodal conduction. (J Cardiovasc Electrophysiol, Vol. 23, pp. 1258–1261, November 2012)