High-grade left internal carotid artery stenosis

Case contributed by Brendan Cullinane


An elderly lady suffering from vertigo.

Patient Data

Gender: Female

The left internal carotid artery stenosis is classified as a high-grade 80-99% stenosis by the University of Washington criteria (PSV > 125cm/s, EDV >140cm/s) and a high-grade >70% stenosis by the NASCET criteria (ICA/CCA ration >4.)

Based on the data (PSV =736cm/s, EDV = 264cm/s, ICA/CCA = 11.5), the stenosis would likely be closer to 99% than the lower end of the above ranges.

A high-grade >50% left external carotid artery stenosis was seen (not shown.) The right carotid arteries were unremarkable and antegrade flow was observed in both vertebral arteries (not shown.)

Case Discussion

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Case information

rID: 19612
Case created: 28th Sep 2012
Last edited: 5th Feb 2016
System: Vascular
Inclusion in quiz mode: Included

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