Key result
Ultrasonography percent stenosis differed from single velocity-based estimates by >10% in 32% of cases, indicating that both ultrasonography and velocity data should be used for interpretation.
Why the study?
Does ultrasonography percent stenosis correlate with velocity-based estimates in the assessment of carotid artery stenosis?
Population
240 carotid duplex images (two data sets of 120 images each) used for assessing carotid artery stenosis
Comparison
Assessment of percent stenosis using… vs Assessment of percent stenosis using velocity…
Design
Cross-sectional
Authors
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May support combined percent stenosis and velocity interpretation in carotid duplex; hypothesis-generating for standardized protocols.
Observational (n=240)
Does ultrasonography percent stenosis correlate with velocity-based estimates in the assessment of carotid artery stenosis?
Effect estimate: r = 0.89
Ultrasonography percent stenosis differs significantly from single velocity-based estimates in about a third of cases, suggesting both US imaging and velocity data should be used for interpreting carotid duplex examinations.
Salles-Cunha et al. (2005) conducted an observational in Carotid artery stenosis (n=240). Velocity measurements (PSV, EDV) vs. Ultrasonography percent stenosis was evaluated on Correlation between ultrasonography percent stenosis and natural logarithm of peak-systolic velocity (r = 0.89). Ultrasonography percent stenosis differed from single velocity-based estimates by >10% in 32% of cases, indicating that both ultrasonography and velocity data should be used for interpretation.
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