Shear stress depends on vascular territory: comparison between common carotid and brachial artery | Zendy

Rúben Dammers | Zendy; Frank Stifft | Zendy; Jan H.M. Tordoir | Zendy; Jeroen M. Hameleers | Zendy; Arnold P.G. Hoeks | Zendy; Peter J.E.H.M. Kitslaar | Zendy

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Shear stress depends on vascular territory: comparison between common carotid and brachial artery

Author(s) -

Rúben Dammers,

Frank Stifft,

Jan H.M. Tordoir,

Jeroen M. Hameleers,

Arnold P.G. Hoeks,

Peter J.E.H.M. Kitslaar

Publication year - 2003

Publication title -

journal of applied physiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.253

H-Index - 229

eISSN - 8750-7587

pISSN - 1522-1601

DOI - 10.1152/japplphysiol.00823.2002

Subject(s) - brachial artery , common carotid artery , medicine , cardiology , shear stress , in vivo , ultrasound , carotid arteries , blood viscosity , anatomy , chemistry , blood pressure , materials science , biology , radiology , microbiology and biotechnology , composite material

Shear stress (SS) is thought to be constant throughout the vascular system. Evidence for this supposition is scarce, however. To verify this hypothesis in vivo, we assessed common carotid (CCA) and brachial artery (BA) peak and mean wall shear rate (SR) noninvasively in 10 healthy volunteers (23.7 +/- 3.4 yr) with an ultrasound SR estimation system. SS was estimated from SR and calculated whole blood viscosity. SR was higher (P < 0.05) in the CCA (mean: 359 +/- 111 s(-1); peak: 1,047 +/- 345 s(-1)) than in the BA (mean: 95 +/- 24 s(-1); peak: 770 +/- 170 s(-1)). Whole blood viscosity was higher in the BA than in the CCA (5.1 +/- 0.7 vs. 3.3 +/- 0.6 mPa. s; P < 0.001). Peak SS did not differ between the CCA and the BA, whereas mean SS was significantly higher in the CCA (1.15 +/- 0.21 Pa) than in the BA (0.48 +/- 0.15 Pa; P < 0.001). These results demonstrate that BA SS strongly deviates from CCA SS in vivo.

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