Dynamics of the Vascular System
are inner and outer arterial diameters, respectively.
and D(w)are frequency domain pressure and diameter, respectively.
Dynamic elastic modulus
plotted as a function of frequency for the
thoracic aorta, abdominal aorta, femoral and carotid arteries. Notice the
show that the viscous modulus is
compared with the elastic modulus (Li et al., 1981; Li, 1987; Nichols and
O'Rourke, 1998). It
of the order of
The dynamic modulus has
also been found
be essentially constant above
complex Young's modulus was considered by Westerhof and
970) to describe arterial wall viscoelasticity and also
utilized frequency dependent parameters.
They define the complex
elastic modulus as the ratio of complex stress to complex strain: