| Simultaneous Ultrasound Assessment of Brachial Artery Shear Stimulus and Flow-Mediated Dilation During Reactive Hyperemia. | |
| | |
MedLine Citation:
|
PMID: 21821350 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
|
In flow-mediated dilation (FMD) studies, brachial artery diameter changes due to reactive hyperaemia are typically measured through manual or automatic analysis of high resolution B-mode images while the stimulus of diameter change, i.e., the flow change, is qualitatively estimated by measuring the mean velocity in the vessel and assuming a parabolic velocity profile. This article describes an experimental approach to simultaneously measure the wall shear rate (WSR) and the diameter variations, through multigate spectral Doppler and B-mode image processing, respectively. By using an ultrasound advanced open platform (ULA-OP), experimental results from the brachial arteries of 15 presumed healthy volunteers have been obtained. The mean increments during reflow against baseline were 105% ± 22% for the peak WSR and 8% ± 3% for the FMD. The mean time interval between the WSR peak and the beginning of plateau of diameter waveform was 38 ± 8 s. The results confirm that in young healthy subjects the postischemic vasodilation of brachial artery is largely correlated to the WSR increase. |
| | |
Authors:
|
Piero Tortoli; Carlo Palombo; Lorenzo Ghiadoni; Giacomo Bini; Lorenzo Francalanci |
Publication Detail:
|
Type: JOURNAL ARTICLE Date: 2011-8-5 |
Journal Detail:
|
Title: Ultrasound in medicine & biology Volume: - ISSN: 1879-291X ISO Abbreviation: - Publication Date: 2011 Aug |
Date Detail:
|
Created Date: 2011-8-8 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 0410553 Medline TA: Ultrasound Med Biol Country: - |
Other Details:
|
Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
|
Copyright © 2011 World Federation for Ultrasound in Medicine & Biology. Published by Elsevier Inc. All rights reserved. |
Affiliation:
|
Department of Electronics and Telecommunications, Università degli Studi di Firenze, Firenze, Italy. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Treatment of Rabbit Liver Cancer In Vivo Using Miniaturized Image-Ablate Ultrasound Arrays.
Next Document: The Lognormal Perfusion Model for Disruption Replenishment Measurements of Blood Flow: In Vivo Valid...