A Case of ATP Sensitive Intra-atrial Reentrant Tachycardia with Various Supraventricular Tachycardias Including a Transition from Atrial Fibrillation to Atrial Tachycardia Manabu Kinoshita 1 , Kouichi Sakabe 1 , Shigenobu Bando 1 , Yoshiko Noda 1 , Hiroyuki Ikefuji 1 , Gentaro Bando 1 , Minoru Horikita 1 , Naoko Yasuda 1 1Division of Cardiology, Kagawa Prefectural Shirotori Hospital Keyword: リエントリー性心房頻拍 , 心房細動 , カテーテルアブレーション , intra-atrial reentrant tachycardia , atrial fibrillation , radiofrequency catheter ablation pp.419-423
Published Date 1999/4/15
DOI https://doi.org/10.11477/mf.1404901887
  • Abstract
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 A 70-year-old woman was admitted to our hospitalfor the management of palpitation due to various supraventricular tachycardias. These tachycardias were able to be terminated by intravenous administration of ATP.

 The tachycadias were initiated and reproduced by atrial extrastimulation, and there was an inverse relationship between the coupling interval of an extrastimulus and the postextrastimulus interval.

 According to the results of electrophysiologic study, we diagnosed these tachycardias as intra-atrial reentrant tachycardia (IART). The induced atrial fibrillation frequently changed to atrial tachycardia.

 The earliest atrial activity during IART was recorded at the mid portion of the anterior right atrium and split potentials were observed at this site, where the IARTwas succesfully ablated. The electrophysiological study after ablation revealed neither induction of IART nor atrial fibrillation. It seems that radiofrequency catheter ablation at a focal site was effective in terminating not only IART but also atrial fibrillation.

 The electrocardiogram showed ST depression in sinus rhythm before ablation but this was normalized a week after ablation. Follow-up observation for 8 months shows no recurrence of atrial tachycardia and atrial fibrillation.

Copyright © 1999, Igaku-Shoin Ltd. All rights reserved.


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