Postexercise Syncope: Evidence for Increased Activity of the Sympathetic Nervous System

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Abstract

This report describes an association of postexertional syncope with increased levels of circulating catecholamines. A 36-year-old male who experienced postexercise bradycardia and asystole had higher basal plasma norepinephrine (120 versus 68 ± 6 pg/ml) and epinephrine (18 versus less than 10 pg/ml) but a similar vagal tone (vagal tone index of 5.44 versus 5.81 ± 1.00 U) when compared with 6 closely matched subjects who underwent an uneventful stress test.

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Journal

Journal ID (publisher-id): CRD

Journal ID (nlm-ta): Cardiology

Journal ID (doi): 10.1159/issn.0008-6312

Title: Cardiology

Publisher: S. Karger AG

ISSN (Print): 0008-6312

ISSN (Electronic): 1421-9751

Publication date Subscription-year: 1993

Publication date (Print): 1993

Publication date (Electronic): 14 November 2008

Volume: 83

Issue: 1-2

Pages: 121-123

Affiliations

^aThe Israel Defence Forces, Medical Corps; ^bHeart Institute, Sheba Medical Center, Tel Hashomer, Israel

Article

Publisher ID: 175957 Other ID: Cardiology 1993;83:121–123

DOI: 10.1159/000175957

PubMed ID: 8261477

SO-VID: 8ef2d44a-aea6-47dc-82a8-1fdfd67a7ae7

License:

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

Date received : 04 March 1993

Date accepted : 19 March 1993

Page count

Pages: 3

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