| Electrical and mechanical response in biventricular mechanical alternans. | |
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MedLine Citation:
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PMID: 92266 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Mechanical alternans of various degrees is produced by rapid heart rates, slower rates in failing hearts and can be brought about by a single extra systole. It has also been shown that the two ventricles may exhibit different degrees of mechanical alternation. The present study was planned to clarify the possible mechanism inducing this latter phenomenon. For this reason myocardial tension was recorded simultaneously from the two ventricles as well as through a miniature strain gage capable of measuring electrogram and myocardial tension of a small area -- just adjacent to a stimulating electrode. The heart was driven at a steady heart rate through one electrode and very late premature beats were applied at various coupling times at another site through an electrode attached to the miniature strain gage. It was found that the degree of mechanical alternans is markedly different at the sites of measurements in either ventricle. These changes could be related to the time interval elapsed between the application of the electrical stimulus and the occurrence of the mechanical response. |
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Authors:
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Y Hasin; O Sarel; S Rogel |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Archives internationales de physiologie et de biochimie Volume: 87 ISSN: 0003-9799 ISO Abbreviation: Arch. Int. Physiol. Biochim. Publication Date: 1979 Feb |
Date Detail:
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Created Date: 1980-01-24 Completed Date: 1980-01-24 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 0405355 Medline TA: Arch Int Physiol Biochim Country: BELGIUM |
Other Details:
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Languages: eng Pagination: 19-28 Citation Subset: IM |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Blood Pressure Dogs Electric Stimulation Heart / physiology* Heart Rate* Physical Stimulation Ventricular Function |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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