The Doppler Spectral Waveform from the Low-Resistance Internal Carotid Artery

Multiple Choice

The Doppler spectral waveform from the low-resistance internal carotid artery can be characterized by

A) high peak systolic velocity and low diastolic flow.
B) rapid systolic upstroke and rapid deceleration to low diastolic flow.
C) slow systolic rise time, rapid deceleration, flow reversal in late systole, and low diastolic flow.
D) cephalad flow throughout the cardiac cycle.