Reflection coefficient can also be defined in terms of vascular
For a vessel with characteristic
terminated with vascular load impedance
the reflection coefficient
is given by:
The reflection coefficient
obtained is therefore a complex quantity
varying with frequency, as before.
Pressure waveforms measured in the femoral artery during control
acetylcholine induced vasodilated
and norepinephrine induced vasoconstricted
states. From Li et al.
The reflection coefficient can also be defined for a particular vascular
instance, Li et al. (1984) utilized a three-point pressure method
to measure the amount of reflections arising from the femoral arterial bed
during (a) control, (b) acetylcholine-induced vasodilation, and (c)
norepinephrine-induced vasoconstriction states (Fig.