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      Relative Cardiac Efficiency and ST Depression during Progressive Exercise Test

      , ,

      Cardiology

      S. Karger AG

      Progressive exercise test, Calculated MVO2/VO2 ratio, Exercise ECG

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          Abstract

          The ratio of calculated myocardial oxygen consumption to estimated oxygen uptake of the body (MVO<sub>2</sub>/VO<sub>2</sub>) provides insight into relative cardiac efficiency. The authors investigated the relation of ST depression to the calculated MVO<sub>2</sub>/VO<sub>2</sub> ratio during a progressive bicycle exercise test in 23 patients with good chronotropic capacity after acute myocardial infarction. ST depression of 0.2 mV or more was required at the highest exercise level. In each case, the lowest MVO<sub>2</sub>/VO<sub>2</sub> value was, on an average, at 60.5% (SD 12.7) of the maximally tolerated work load. The magnitude (mV) and the velocity (µV/min) of ST depression measured at the exercise level after the lowest MVO<sub>2</sub>/VO<sub>2</sub> value were significantly higher than the same parameters at the exercise level corresponding to the lowest MVO<sub>2</sub>/VO<sub>2</sub> value. The authors believe that the lowest value of the calculated MVO<sub>2</sub>/VO<sub>2 </sub>ratio can be regarded as a critical point which is followed by the acceleration of ST depression.

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          Author and article information

          Journal
          CRD
          Cardiology
          10.1159/issn.0008-6312
          Cardiology
          S. Karger AG
          0008-6312
          1421-9751
          1981
          1981
          07 November 2008
          : 68
          : 1
          : 54-58
          Affiliations
          Állami Kórház, Balatonfüred, Hungary
          Article
          173264 Cardiology 1981;68:54–58
          10.1159/000173264
          7249002
          © 1981 S. Karger AG, Basel

          Copyright: All rights reserved. No part of this publication may be translated into other languages, reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying, recording, microcopying, or by any information storage and retrieval system, without permission in writing from the publisher. Drug Dosage: The authors and the publisher have exerted every effort to ensure that drug selection and dosage set forth in this text are in accord with current recommendations and practice at the time of publication. However, in view of ongoing research, changes in government regulations, and the constant flow of information relating to drug therapy and drug reactions, the reader is urged to check the package insert for each drug for any changes in indications and dosage and for added warnings and precautions. This is particularly important when the recommended agent is a new and/or infrequently employed drug. Disclaimer: The statements, opinions and data contained in this publication are solely those of the individual authors and contributors and not of the publishers and the editor(s). The appearance of advertisements or/and product references in the publication is not a warranty, endorsement, or approval of the products or services advertised or of their effectiveness, quality or safety. The publisher and the editor(s) disclaim responsibility for any injury to persons or property resulting from any ideas, methods, instructions or products referred to in the content or advertisements.

          Page count
          Pages: 5
          Categories
          Original Paper

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