| Effect of inotropic interventions on rate of change of ventricular diastolic dimensions. | |
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MedLine Citation:
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PMID: 7282946 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The effects of inotropic interventions upon the maximal rate of change of left ventricular (LV) wall thickness and internal diameter during early diastole were measured in nine open-chest dogs by ultrasonic-dimension gauges. Isoproterenol increased the maximal rate of wall thickening during systole from 28 +/- 3 to 48 +/- 5 (SE) mm/s (P less than 0.001), whereas it had no effect on the maximal rate of wall thinning during early diastole, 40 +/- 4 vs. 42 +/- 4 mm/s [not significant (NS)]. Isoproterenol also increased the maximal rate of reduction of the LV diameter during systole from 87 +/- 6 to 125 +/- 8 mm/s (P less than 0.001), whereas it had little effect on the maximal rate of increase of the diameter during early diastole, 79 +/- 6 vs. 87 +/- 4 mm/s (NS). Similarly, propranolol had a direct effect on the maximal rate of wall thickening and LV diameter reduction during systole, but it had little or no effect on their counterparts during early diastole. These observations support the concept that alterations of the contractile state need not be accompanied by a concomitant effect on relaxation. |
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Authors:
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H N Sabbah; P D Stein |
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Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
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Title: The American journal of physiology Volume: 241 ISSN: 0002-9513 ISO Abbreviation: Am. J. Physiol. Publication Date: 1981 Sep |
Date Detail:
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Created Date: 1981-11-18 Completed Date: 1981-11-18 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 0370511 Medline TA: Am J Physiol Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: H376-80 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 / drug effects Diastole / drug effects* Dogs Heart Ventricles / drug effects Isoproterenol / pharmacology* Muscle Relaxation / drug effects Myocardial Contraction / drug effects* Propranolol / pharmacology* Ventricular Function |
| Grant Support | |
ID/Acronym/Agency:
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HL-23669-02/HL/NHLBI NIH HHS |
| Chemical | |
Reg. No./Substance:
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525-66-6/Propranolol; 7683-59-2/Isoproterenol |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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