| Significance of coupling intervals of ventricular extrasystoles. | |
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MedLine Citation:
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PMID: 4142409 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Extrasystoles may have fixed or variable coupling intervals. The latter may be divided into those with coupling intervals related to and following the T wave of the preceding QRS (approximate coupling) and those which occur throughout electrical diastole with no obvious relationship to the T wave of the dominant rhythm (random coupling). Extrasystoles with random and approximate coupling may or may not be parasystolic. The relationship of extrasystoles to the dominant rhythm may alter. In particular, fixed coupling may precede or alternate with approximate coupling. These groups cannot be considered distinct, in view of transitions from one type of extrasystole to another. Extrasystoles with both approximate coupling and fixed coupling tend to occur just after the T wave and often occurred on the apex of the U wave. Approximate non-parasystolic coupling was infrequent in electrocardiograms which were otherwise normal. Random non-parasystolic coupling and parasystole only occurred in patients with cardiac disease. In view of these findings, it is proposed that extrasystoles should be described by their degree of dependence on each other (regularity of interectopic intervals) and their degree of dependence on conducted beats (regularity of coupling intervals), |
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Authors:
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S Talbot |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Cardiology Volume: 59 ISSN: 0008-6312 ISO Abbreviation: Cardiology Publication Date: 1974 |
Date Detail:
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Created Date: 1975-07-24 Completed Date: 1975-07-24 Revised Date: 2004-11-17 |
Medline Journal Info:
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Nlm Unique ID: 1266406 Medline TA: Cardiology Country: SWITZERLAND |
Other Details:
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Languages: eng Pagination: 231-43 Citation Subset: IM |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Cardiac Complexes, Premature
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diagnosis*,
physiopathology Electrocardiography Heart Conduction System / physiopathology Heart Rate Humans |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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