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Differential impact of water immersion on arterial blood flow and shear stress in the carotid and brachial arteries of humans

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Awdur
Carter, H.C
Spence, A.L
Ainslie, Philip
Pugh, Christopher J. A.
Naylor, L.H.
Green, D.J.
Dyddiad
2017-05-30
Dyddiad derbyn
2017-04-22
Math
Article
Cyhoeddwr
Wiley Periodicals, Inc.
ISSN
2051-817X
Metadata
Dangos cofnod eitem llawn
Crynodeb
Arterial shear stress is a potent stimulus to vascular adaptation in humans. Typically, increases in retrograde shear have been found to acutely impair vascular function while increases in antegrade shear enhance function. We hypothesized that blood flow and shear stress through the brachial and carotid arteries would change in a similar manner in response to water immersion, an intervention which modifies hemodynamics. Nine healthy young male subjects were recruited to undergo controlled water immersion in a standing upright position to the level of the right atrium in 30°C water. Diameters were continuously and simultaneously recorded in the brachial and common carotid arteries along with mean arterial pressure (MAP), cardiac output (CO), and heart rate before, during, and after 10 min of immersion. MAP and CO increased during water immersion (baseline vs. 8–10 min; 80 9 vs. 91 12 mmHg; and 4.8 0.7 vs. 5.1 0.6 L/min, P < 0.01 and P < 0.05, respectively). We observed a differential regulation of flow and shear stress patterns in the brachial and carotid arteries in response to water immersion; brachial conductance decreased markedly in response to immersion (1.25 0.56 vs. 0.57 0.30 mL.min/mmHg, P < 0.05), whereas it was unaltered in the carotid artery (5.82 2.14 vs. 5.60 1.59). Our findings indicate that adaptations to systemic stimuli and arterial adaptation may be vessel bed specific in humans, highlighting the need to assess multiple vascular sites in future studies.
Cyfnodolyn/trafodion cynhadledd
Physiological Reports;
Dyfyniad
Carter, H.H., Spence, A.L., Ainslie, P.N., Pugh, C.J., Naylor, L.H. and Green, D.J. (2017) 'Differential impact of water immersion on arterial blood flow and shear stress in the carotid and brachial arteries of humans', Physiological Reports, 5(10), p.e13285.
URI
http://hdl.handle.net/10369/8510
Dynodwr Gwrthrych Digidol (DOI)
http://dx.doi.org/10.14814/phy2.13285
Disgrifiad
This article was published in Physiological Reports on 30 May 2017, available open access at http://dx.doi.org/10.14814/phy2.13285
Hawliau
https://creativecommons.org/licenses/by/2.0/
Nawdd
Cardiff Metropolitan University (Grant ID: Cardiff Metropolian (Internal))
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