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Initial experience with a rate responsive (TX) pacemaker Masao Yasuno 1 , Kazuaki Kumagai 1 , Kazunori Mohri 1 , Masami Nishino 1 , Yoshihide Nishino 1 , Taizo Akashi 1 , Hideo Tanahashi 1 , Keiji Kobayashi 1 , Yoshio Yamada 1 1Department of Internal Medicine, Osaka Rosai Hospital pp.865-870
Published Date 1986/8/15
DOI https://doi.org/10.11477/mf.1404204913
  • Abstract
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In this report we describe our initial experience with a new rate responsive TX pacemaker. This pacemaker system uses a conventional transvenous ventricular elect-rode, which senses the evoked T after a ventricular paced beat, as an indicator of metabolic demand. Satis-factory rate response as assessed by bicycle ergometer and Holter monitoring was achieved in 4 patients with sick sinus syndrome. In the first patient, a cardiac output was measured by a thermodilution method during the bicycle ergometer, which confirmed that an adequate increase in cardiac output was obtained by an increase of pacing rate. Our results show that physiological rate responsive pacing using the QT interval provides a simple means of increasing the heart rate and cardiac output in accordance with the patients' metabolic de-mand.


Copyright © 1986, 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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