Which of the following can cause difficulties with carotid artery stents, such as restriction of balloon expansion, inadequate stent expansion, and increased risk of stent fracture?
A. Smooth, homogeneous plaque
B. Smooth, homogeneous plaque
C. Calcified plaque
D. Intraluminal thrombus
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During a duplex exam post-CAS, the stent is noted to have an irregular border with an abrupt edge. Turbulence is noted with color and spectral doppler. What do these findings suggest?
A. stent deformation
B. stent fracture
C. stent restenosis
D. dissection
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