| The effect of hyperdynamic sepsis on myocardial performance. | |
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MedLine Citation:
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PMID: 3995694 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The reviewed studies support the contention that during the high flow or hyperdynamic phase of gram-negative septicemia, cardiac reserve is compromised because of intrinsic myocardial dysfunction. The latter is not referable to coronary hypoperfusion or peripheral pooling or decreased venous return. Although, under resting, nonstressed conditions, indices of myocardial function may appear normal or even elevated, a decreased reserve is evident when additional stress is imposed on the myocardium. Hearts removed from septic rats during the hyperdynamic stage and perfused in vitro (using the isolated perfused working heart preparation) showed a rightward and downward shift in work function curves, indicating a severe depression in cardiac function. Possible mechanisms for the observed dysfunction are discussed. No significant alterations in high energy phosphate production or substrate utilization were observed, indicating that altered myocardial metabolism is not likely to be a significant contributor to the dysfunction. Our results suggest that cardiac dysfunction is partially due to an elevation in the cytosolic calcium concentration which may slow the rate of ventricular relaxation. These studies emphasize that intrinsic cardiac function is depressed early during the course of the septic episode at a time that precedes the onset of circulatory shock. |
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Authors:
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K H McDonough; C H Lang; J J Spitzer |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
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Title: Circulatory shock Volume: 15 ISSN: 0092-6213 ISO Abbreviation: Circ. Shock Publication Date: 1985 |
Date Detail:
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Created Date: 1985-07-12 Completed Date: 1985-07-12 Revised Date: 2007-11-15 |
Medline Journal Info:
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Nlm Unique ID: 0414112 Medline TA: Circ Shock Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 247-59 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 Calcium / metabolism Cardiac Output Contractile Proteins / metabolism Coronary Circulation* Energy Metabolism Heart Ventricles / physiopathology Hemodynamics* Homeostasis Myocardial Contraction* Myocardium / metabolism Rats Shock, Septic / physiopathology* |
| Grant Support | |
ID/Acronym/Agency:
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HL07098/HL/NHLBI NIH HHS; HL23157/HL/NHLBI NIH HHS |
| Chemical | |
Reg. No./Substance:
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0/Contractile Proteins; 7440-70-2/Calcium |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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