Key result
Duplex ultrasound demonstrated a sensitivity of 86.8% to 91.2% and specificity of 50% for detecting ≥70% extracranial carotid stenosis, proving less accurate than digital subtraction angiography.
Why the study?
Does Digital Subtraction Angiogram (DSA) provide better diagnostic accuracy than Duplex Ultrasound (USD) for extracranial carotid stenosis in patients with ischemic stroke or TIA?
Population
40 patients with ≥50% extracranial carotid stenosis on Duplex Ultrasound
Comparison
Digital Subtraction Angiogram (DSA) vs Duplex Ultrasound (USD)
Design
Cross-sectional
Authors
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Duplex ultrasound's low specificity cautions against sole reliance for stenosis grading; leaves open DSA's optimal role in pre-intervention assessment.
Cross-Sectional (n=40)
Single-blind
No
Does Digital Subtraction Angiogram (DSA) provide better diagnostic accuracy than Duplex Ultrasound (USD) for extracranial carotid stenosis in patients with ischemic stroke or TIA?
Digital Subtraction Angiogram is superior to Duplex Ultrasound in accurately determining the degree of extracranial carotid stenosis, suggesting it should be performed before interventions like carotid endarterectomy or stenting.
Chowdhury et al. (1970) conducted a cross-sectional in Extracranial carotid stenosis (n=40). Duplex Ultrasound (USD) vs. Digital Subtraction Angiogram (DSA) was evaluated on Sensitivity, specificity, and accuracy of Duplex Ultrasound for detecting ≥70% carotid stenosis. Duplex ultrasound demonstrated a sensitivity of 86.8% to 91.2% and specificity of 50% for detecting ≥70% extracranial carotid stenosis, proving less accurate than digital subtraction angiography.
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