| Deceleration vs. acceleration: a haemodynamic parameter in the assessment of vascular reactivity. A preliminary study. | |
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MedLine Citation:
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PMID: 7735648 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The parameter deceleration vs. acceleration (dc/ac) as derived from the instantaneous peak velocity is obtained by dividing the descending and ascending slopes of plotted velocity curves. Blood velocities were recorded with a specially designed continuous-wave ultrasonic Doppler unit which provides: the instantaneous peak velocity, the instantaneous mean velocity, the acceleration, and an indication of volume flow. A physical meaning to the dc/ac parameter is given through an analysis, based on an electrical model, of a small portion of an artery. This gives a simple relationship which only takes account of the assumed vascular resistances. Measurements were performed in 67 male subjects; 39 were normotensive control subjects and 28 had established moderate hypertension. In both groups there was an increase of dc/ac in passing from the supine to the erect position, the increase being more accentuated by hypertension. The variation of dc/ac with age was significantly different in both groups. The results suggest that this parameter is a sensitive indicator of variations in vascular reactivity and as an indicator of structural changes in the arterial wall. |
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Authors:
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A Sainz; J Cabau; V C Roberts |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Medical engineering & physics Volume: 17 ISSN: 1350-4533 ISO Abbreviation: Med Eng Phys Publication Date: 1995 Mar |
Date Detail:
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Created Date: 1995-06-07 Completed Date: 1995-06-07 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 9422753 Medline TA: Med Eng Phys Country: ENGLAND |
Other Details:
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Languages: eng Pagination: 91-5 Citation Subset: IM |
Affiliation:
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Department of Basic Medical Sciences, Universitat de LLeida, Spain. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adolescent Adult Biomedical Engineering Biophysical Phenomena Biophysics Blood Flow Velocity / physiology Hemodynamics / physiology* Humans Laser-Doppler Flowmetry Male Middle Aged Models, Cardiovascular Radial Artery / physiology, ultrasonography Vascular Resistance / physiology |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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