Advanced
Technical
IVT
aortic wall shear stress
The tangential force per unit area exerted by blood flow on the aortic wall surface.
Full Definition
Aortic wall shear stress refers to the hemodynamic force created by flowing blood against the inner surface of the aortic wall. This biomechanical parameter is crucial in aortic pathophysiology as abnormal shear stress patterns contribute to aortic wall degeneration, aneurysm formation, and dissection risk. Low wall shear stress areas are particularly susceptible to atherosclerotic changes, while high shear stress regions may experience wall weakening over time.
Usage
Usage note: Often abbreviated as WSS in technical literature; distinguish from wall tension which refers to circumferential force.
In Context
- "Computational fluid dynamics revealed elevated aortic wall shear stress in the ascending aorta proximal to the bicuspid valve." — research manuscript
- "The patient's follow-up imaging demonstrated focal aortic dilatation in regions previously identified as having low wall shear stress." — clinical report
Also known as
WSS
hemodynamic shear stress
Don't confuse with
aortic wall tension
aortic wall strain