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Internal Carotid Artery Stenosis

History
A patient presents with a known left hemisphere infarct, ? degree of internal carotid artery stenosis.

Findings
There is a critical stenosis of the left internal carotid artery (ICA) at its origin. Moderate irregularity and narrowing of the right ICA is noted at its origin. Carotid Doppler ultrasound quantifies the left ICA stenosis to be greater than 70% and the spectral waveform pattern suggests string flow or a near occlusion. The right ICA stenosis was measured at between 50-59%.

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