Why the study?
Does Duplex ultrasound accurately quantify internal carotid artery stenosis compared to angiography?
Does Duplex ultrasound accurately quantify internal carotid artery stenosis compared to angiography?
Duplex ultrasound is highly sensitive for excluding severe carotid stenosis but may overestimate stenosis severity.
May support ruling out severe carotid stenosis; leaves open accuracy of quantification versus angiography.
Duplex US is an excellent examination to screen for high-grade carotid artery stenosis; however, it tends to lead to an overestimation of the degree of stenosis. Exclusion of 70%-99% angiographic stenosis can be achieved with a sensitivity of up to 98%.
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Sabeti et al. (2004) studied this question.
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