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A Case of Successful Ablation of Ectopic Atrial Tachycardia whose Origin was Detected by Isopotential Mapping Teruhisa Yoshida 1 , Masanobu Ohga 1 , Manabu Matsumoto 1 , Takashi Hamada 1 , Ichiro Kubara 1 , Tatsuro Hiraki 1 , Hisao Ikeda 1 , Tsutomu Imaizumi 1 , Masaaki Kanahara 2 1The Third Department of Internal Medicine, Kurume University School of Medicine 2The Institute of Cardiovascular Disease, Kurume University School of Medicine Keyword: 異所性心房頻拍 , 体表面電位図 , アブレーション , ectopic atrial tachycardia , isopotential map , catheter ablation pp.717-721
Published Date 1998/7/15
DOI https://doi.org/10.11477/mf.1404901732
  • Abstract
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A 20-year-old man with ectopic atrial tachycardia, the origin of which was detected by isopotential map-ping underwent radiofrequency ablation of the origin via a transseptal approach. At the age of 17, tachycardia -induced congestive heart failure developed and medical treatment was begun. However. the tachycardia was refractory to medical therapy. Before the ablation pro-cedure, a body surface map was recorded during atrial tachycardia from 87 points. An isopotential map was constructed from the points, and the site of the earliest atrial activation was found to be in the left atrial region. On electrophysiological study. tachycardia appeared to be due to atrial automaticity. The transseptal mapping showed that the site of the earliest atrial activation was in the right superior pulmonary vein region of the left atrium. Radiofrequency energy was delivered to the region, with termination of the tachycardia. The isopotential map was useful for determinating the origin of atrial tachycardia. Transseptal catheter ablation of the right superior pulmonary vein region of the left atrium was safe and effective in treating this patient with drug -refractory ectopic atrial tachycardia of left atrial origin.


Copyright © 1998, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1200 印刷版ISSN 0452-3458 医学書院

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