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      Transient QRS Axis Shift to the Right during Right Coronary Artery and/or Left Circumflex Artery Spasms

      case-report

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          Abstract

          The QRS axis was measured in 24 patients during ergonovine malate provocation test (EM test). Of 12 patients with significant spasm of the right coronary artery (RCA) and/or left circumflex artery (LCX), the QRS axis shifted to the right in 7 patients after the EM test (mean 8.2°), and the axis shifted back to the left in 9 patients after nitroglycerin administration (mean – 9.1 °). The sensitivity of right axis shift for RCA and LCX spasm was 58% and the specificity was 80%. Thus, right axis shift seems to be associated with myocardial ischemia due to RCA and LCX spasm and to be useful for the detection of RCA and/or LCX spasms.

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          Author and article information

          Journal
          CRD
          Cardiology
          10.1159/issn.0008-6312
          Cardiology
          S. Karger AG
          0008-6312
          1421-9751
          1989
          1989
          11 November 2008
          : 76
          : 3
          : 222-227
          Affiliations
          aFirst Department of Internal Medicine, Tottori University School of Medicine, and bDepartment of Internal Medicine, San-in Rosai Hospital, Yonago, Japan
          Article
          174494 Cardiology 1989;76:222–227
          10.1159/000174494
          2776142
          9244068c-7c57-48c3-82af-29efc5d156ce
          © 1989 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.

          History
          : 29 March 1988
          : 16 November 1988
          Page count
          Pages: 6
          Categories
          Case Report

          General medicine,Neurology,Cardiovascular Medicine,Internal medicine,Nephrology
          Myocardial ischemia,QRS axis shift,Ergonovine malate provocation test,Coronary artery spasm

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