https://doi.org/10.4081/jbr.2003.10545
Does Curvature Affect Vascular Haemodynamic and Shear-Stress?
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Published: 31 December 2003
Many vascular compartments of interest for diagnostic or therapeutic purpose, such as the coronary arteries, the umbilical vessels, the circle of Willis and the aorta itself are curved and/or coiled, causing the appearance of non axial velocity components (influencing the wall’s shear-stress) and changing the pattern of the axial velocity components (for instance, by raising the turbolence threshold) [1]. Current clinical flowmetry techniques are based on the principle that, upon insonifying the vessels with a US beam, a (Doppler shifted) signal is obtained which is proportional to the haematic velocity. In the simplest cases, i.e.when the blood is moving in the direction of the vessel’s axis, a linear relationship between the Doppler signal and the blood velocity is expected. [...]
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