Journal Article

Atrial tachycardia with slow pathway conduction mimicking typical atrioventricular nodal reentrant tachycardia

Takumi Yamada, Jose F. Huizar, Hugh T. McElderry and G. Neal Kay

in EP Europace

Published on behalf of European Heart Rhythm Association of the European Society of Cardiology (ESC)

Volume 9, issue 5, pages 299-301
Published in print May 2007 | ISSN: 1099-5129
Published online March 2007 | e-ISSN: 1532-2092 | DOI: http://dx.doi.org/10.1093/europace/eum037
Atrial tachycardia with slow pathway conduction mimicking typical atrioventricular nodal reentrant tachycardia

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A 68-year-old woman with palpitations underwent electrophysiologic testing. During burst atrial pacing the PR interval exceeded the RR interval and induced a supraventricular tachycardia consistent with a typical AV nodal reentrant tachycardia (AVNRT). Radiofrequency ablation of the slow pathway during the tachycardia immediately produced 2 : 1 AV conduction. After slow AV nodal pathway ablation an atrial tachycardia (AT) remained inducible with the earliest atrial activation around the HB region. Radiofrequency ablation at the site of earliest atrial activation interrupted the AT without AV block. AT originating from the HB region with slow pathway conduction may mimic typical AVNRT.

Keywords: Atrial tachycardia; Slow pathway; Atrioventricular nodal reentrant tachycardia; Radiofrequency catheter ablation

Journal Article.  1283 words.  Illustrated.

Subjects: Cardiovascular Medicine

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