NDLI: Effect of head posture on the healthy human carotid bifurcation hemodynamics

Content Provider	Springer Nature Link
Author	Papaharilaou, Yannis Aristokleous, Nicolas Seimenis, Ioannis Khozeymeh, Mohammad Iman Georgiou, Georgios C. Brott, Brigitta C. Eracleous, Elena Anayiotos, Andreas S.
Copyright Year	2012
Abstract	Head and neck postures may cause morphology changes to the geometry of the carotid bifurcation (CB) that alter the low and oscillating wall shear stress (WSS) regions previously reported as important in the development of atherosclerosis. Here the right and left CB were imaged by MRI in two healthy subjects in the neutral head posture with the subject in the supine position and in two other head postures with the subject in the prone position: (1) rightward rotation up to 80°, and (2) leftward rotation up to 80°. Image-based computational models were constructed to investigate the effect of posture on arterial geometry and local hemodynamics. The area exposure to unfavorable hemodynamics, based on thresholds set for oscillatory shear index (OSI), WSS and relative residence time, was used to quantify the hemodynamic impact on the wall. Torsion of the head was found to: (1) cause notable changes in the bifurcation and internal carotid artery angles and, in most cases, on cross-sectional area ratios for common, internal and external carotid artery, (2) change the spatial distribution of wall regions exposed to unfavorable hemodynamics, and (3) cause a marked change in the hemodynamic burden on the wall when the OSI was considered. These findings suggest that head posture may be associated with the genesis and development of atherosclerotic disease as well as complications in stenotic and stented vessels.
Starting Page	207
Ending Page	218
Page Count	12
File Format	PDF
ISSN	01400118
Journal	Medical and Biological Engineering and Computing
Volume Number	51
Issue Number	1-2
e-ISSN	17410444
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-11-10
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Image-based CFD Wall shear stress Posture changes Geometry characterisation Atherosclerosis Human Physiology Biomedical Engineering Imaging Radiology Computer Applications
Content Type	Text
Resource Type	Article
Subject	Biomedical Engineering Computer Science Applications

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