Case of the Month October 2014, page 2

Answer:

C:
Peak systolic velocity greater than 125 cm/s indicates at least 50% ICA stenosis. A peak greater than 230 cm/s indicates at least 70%.
While this patient’s distal left ICA is significantly abnormal, no stenosis is visible.

For a larger image please click on Doppler Ultraspound 3 .



Question:

What is a potential cause of retrograde flow within the external carotid artery as seen in this patient?
    A) Common carotid occlusion
    B) Subclavian steal
    C) Acute trauma
    D) Malignancy

For a larger image, please click on Doppler Ultrasound 4 .




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