title: Intra-atrial conduction block mimicking atrioventricular nodal block after multiple catheter ablation procedures for atrial tachycardia in a patient with cardiomyopathy.
abstract: 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.
authors: Division of Cardiology, University of Michigan Health System, Ann Arbor, Michigan 48109, USA. achugh@umich.edu
authors: Aman
authors: A
authors: Chugh
authors: Miki
authors: M
authors: Yokokawa
authors: Timir
authors: T
authors: Baman
authors: Frank
authors: F
authors: Bogun
authors: Audrey
authors: A
authors: Wu
mesh_terms: D000328:Adult; D054537:Atrioventricular Block / Q000175:diagnosis*; D002304:Cardiac Pacing, Artificial; D009202:Cardiomyopathies / Q000150:complications*; D017115:Catheter Ablation / Q000009:adverse effects*; D054326:Coronary Sinus / Q000503:physiopathology; D003937:Diagnosis, Differential; D004562:Electrocardiography; D022062:Electrophysiologic Techniques, Cardiac; D004867:Equipment Design; D005260:Female; D006327:Heart Block / Q000175:diagnosis / Q000209:etiology* / Q000503:physiopathology / Q000628:therapy; D006801:Humans; D010138:Pacemaker, Artificial; D011237:Predictive Value of Tests; D012008:Recurrence; D013617:Tachycardia, Supraventricular / Q000175:diagnosis / Q000209:etiology / Q000503:physiopathology / Q000601:surgery*; D013997:Time Factors; D016896:Treatment Outcome; D014261:Tricuspid Valve / Q000503:physiopathology / Q000601:surgery*