Key result
Duplex ultrasound demonstrated a sensitivity of 93.3-93.8% and specificity of 66.7-75% for detecting 70% carotid stenosis compared to the gold standard digital subtraction angiography, indicating it may underestimate or overestimate stenosis severity.
Why the study?
Does duplex ultrasound accurately diagnose extracranial carotid stenosis compared to digital subtraction angiography in patients with ischemic stroke or TIA?
Population
38 patients with extracranial carotid stenosis >50% on duplex ultrasound
Comparison
Duplex ultrasound (USD) vs Digital subtraction angiography using NASCET…
Design
Cross-sectional
Authors
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Caution warranted with duplex ultrasound for 70% carotid stenosis grading; leaves open need for DSA confirmation in observational cohorts.
Cross-Sectional (n=38)
No
Does duplex ultrasound accurately diagnose extracranial carotid stenosis compared to digital subtraction angiography in patients with ischemic stroke or TIA?
Duplex ultrasound may underestimate or overestimate the degree of carotid stenosis compared to digital subtraction angiography, suggesting DSA remains necessary before revascularization procedures.
Dey et al. (2014) conducted a cross-sectional in Extracranial carotid stenosis (n=38). Duplex ultrasound vs. Digital subtraction angiography was evaluated on Diagnostic accuracy (sensitivity, specificity, accuracy) of duplex ultrasound for detecting 70% carotid stenosis. Duplex ultrasound demonstrated a sensitivity of 93.3-93.8% and specificity of 66.7-75% for detecting 70% carotid stenosis compared to the gold standard digital subtraction angiography, indicating it may underestimate or overestimate stenosis severity.
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