Carotid artery imaging using duplex scanning and bidirectional arteriography: a comparison

Area of Science:

• Vascular Surgery
• Diagnostic Imaging
• Cardiology

Background:

• Carotid artery stenosis is a significant risk factor for stroke.
• Accurate non-invasive detection of carotid artery disease is crucial for patient management.

Purpose of the Study:

• To compare the diagnostic accuracy of duplex ultrasound with transfemoral bidirectional arteriography for evaluating common carotid bifurcations.
• To assess the sensitivity of duplex imaging in detecting various degrees of carotid artery stenosis and occlusion.

Main Methods:

• 101 common carotid bifurcations were examined using duplex ultrasound.
• Findings were compared with transfemoral bidirectional arteriography as the gold standard.

Main Results:

• Duplex ultrasound demonstrated 100% accuracy in detecting high-grade stenosis (>50%) and 85% accuracy for vessel occlusion.
• 86% of low-grade stenosis (<50%) lesions were accurately detected.
• Duplex scanning identified plaque in angiographically normal vessels, indicating high sensitivity for minimal disease.

Conclusions:

• Duplex ultrasound is a highly accurate and sensitive tool for diagnosing carotid artery stenosis and occlusion.
• High-resolution real-time imaging effectively detects minimal carotid artery disease, even without Doppler flow abnormalities.