29
views
0
recommends
+1 Recommend
1 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found

      On the Reliability of Systolic Time Intervals

      research-article

      Read this article at

      ScienceOpenPublisherPubMed
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          With the purpose of detecting spontaneous variation of systolic time intervals (STI), 20 normal subjects have been examined and the STI has been recorded for 5 consecutive days at the beginning of the test and 20, 40 and 60 min afterwards. Significant differences were found for PEP, LVET and the PEP/LVET ratio between observations (p < 0.05) and between days (p < 0.01). All the values of the STI at the fifth day are rather near the values recorded at the last observation of the first day. This may be related to the presence of some factor (catecholamine release induced by emotional stress?) resulting in physiological changes which are reduced by repetition of the test. This hypothesis was confirmed in a second series of normal volunteers where the STI were recorded simultaneously with sampling of blood for assessing circulating CA levels. A highly significant correlation (p < 0.001) was recorded between PEP, PEP/LVET and plasma CA making it evident that the increase of PEP<sub>I</sub> and PEP/LVET is directly correlated with the reduction of plasma CA level.

          Related collections

          Author and article information

          Journal
          CRD
          Cardiology
          10.1159/issn.0008-6312
          Cardiology
          S. Karger AG
          0008-6312
          1421-9751
          1982
          1982
          07 November 2008
          : 69
          : 3
          : 157-165
          Affiliations
          aBrescia Civil Hospitals, 4th Division of Medicine, and bChair of Mathematics for Life Sciences, University of Milan, Italy
          Article
          173498 Cardiology 1982;69:157–165
          10.1159/000173498
          7127348
          d9ca56ec-f22d-4fcc-a3a2-b843cab142f5
          © 1982 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
          : 12 December 1981
          : 12 March 1982
          Page count
          Pages: 9
          Categories
          Original Paper

          General medicine,Neurology,Cardiovascular Medicine,Internal medicine,Nephrology
          Preejection period,Left ventricular function,Noninvasive techniques,Left ventricular ejection time

          Comments

          Comment on this article