A “rule of thumb”  for spectral Doppler and stenosis is that a 50% diameter reduction is equal to;

Proximal to a significant stenosis, the CCA may exhibit a wave form similar to:

Critical stenosis occurs when cross-sectional area has been reduced by _______, which is a _______ diameter reduction. 

If a stenosis measures or appears less than 50% by image/caliber but velocity acceleration with post stenotic turbulence occurs, the lesion is considered greater than:

Which of the following are a duplex indication of a totally occluded internal carotid artery?

Where does the Doppler  waveform contour describes as “string sign” usually occur?

Blood always moves from an area of __________ to an area of __________. 

A contralateral ICA occlusion may cause the ipsilateral ICA velocities to be;

Using this image and spectral Doppler, this would most likely be;deformed car stent(1).jpg

The most common medical treatment of acute ischemic stroke is;