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      Some Thoughts Concerning the Nomenclature of A-V Nodal Arrhythmias

      Cardiology

      S. Karger AG

      Atrioventricular arrhythmias, A-V junctional arrhythmias, Junctional arrhythmias, A-V dissociation

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          Abstract

          The fundamental mechanisms responsible for the production of the P, QRS, and T complexes in A-V nodal arrhythmias are reviewed. Particular emphasis is placed on the underlying mechanisms which lead to various relationship between atrial and ventricular activation in A-V noda arrhythmias. It is concluded that the classification of so-called ‘upper’, ‘middle’ and Mower’ A-V nodal beats or rhythm is only justified if one assumes antegrade and retrograde conduction times are identical. Since antegrade and retrograde conduction disturbances of varying degrees are commonly observed in the A-V junction when dealing with patients with various A-V nodal arrhythmias, the above classification of A-V nodal arrhythmias should be avoided. Atrioventricular dissociation commonly results when A-V nodal arrhythmias develop. Similarly, reciprocal beats or rhythm (or tachycardia) are not uncommonly initiated by A-V nodal arrhythmias. A-V nodal parasystole is a less common A-V nodal arrhythmia. The factors which may produce or suppress A-V nodal arrhythmias include vagal and sympathetic effects, chemical mediators, various drugs, particularly digitalis, electrolyte imbalance and various cardiac and non-cardiac diseases.

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          Author and article information

          Journal
          CRD
          Cardiology
          10.1159/issn.0008-6312
          Cardiology
          S. Karger AG
          0008-6312
          1421-9751
          1970
          1970
          29 October 2008
          : 55
          : 3
          : 156-163
          Affiliations
          Division of Cardiology, Department of Medicine, West Virginia University School of Medicine, Morgantown, W.Va.
          Article
          169279 Cardiology 1970;55:156–163
          10.1159/000169279
          5512112
          © 1970 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: 8
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