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[The role of Doppler US in the study of carotid system]
M Salcuni1, V Di Lazzaro, C Di Stasi
1Istituto di Radiologia, Università Cattolica del S. Cuore, Roma, Italy.
Insights
Color Doppler ultrasound is a key noninvasive tool for diagnosing carotid artery disease and identifying stroke risk. It aids in characterizing plaques and quantifying stenosis, guiding treatment decisions for patients.
Area of Science:
- Vascular Neurology
- Diagnostic Imaging
- Cardiovascular Medicine
Background:
- Color Doppler Ultrasound (CDUS) is the leading noninvasive method for diagnosing carotid artery disease.
- Patients at risk for stroke often require comprehensive hemodynamic evaluation of cerebral vessels.
Purpose of the Study:
- To highlight the diagnostic role of Color Doppler Ultrasound in carotid disease and stroke risk assessment.
- To emphasize the combined utility of Doppler Ultrasound and transcranial Doppler for complete cerebral vessel evaluation.
Main Methods:
- Utilized Color Doppler Ultrasound for noninvasive diagnosis of carotid artery disease.
- Employed CDUS for plaque characterization and stenosis quantification.
- Assessed internal carotid dissection using CDUS for diagnosis and follow-up.
Main Results:
- CDUS is crucial for identifying patients at risk for stroke due to carotid disease.
- Plaque characterization by CDUS is vital for understanding embolic stroke mechanisms.
- CDUS accurately quantifies stenosis, identifying candidates for surgical intervention (e.g., >70% stenosis).
Conclusions:
- Color Doppler Ultrasound is essential for the noninvasive diagnosis and management of carotid artery disease.
- Combined Doppler and transcranial Doppler offer a complete hemodynamic assessment of cerebral vasculature.
- CDUS facilitates early diagnosis and follow-up of internal carotid dissection, a cause of cerebrovascular insufficiency.
Abstract:
Color Doppler US is at present the most reliable noninvasive procedure in the diagnosis of carotid disease and plays a major diagnostic role in the patient at risk for stroke. The anatomofunctional relationships of carotid and vertebrobasilar system suggest a diagnostic combination between Doppler US and transcranial Doppler for complete hemodynamic evaluation of normal and pathologic cerebral vessels. The most relevant disease, as the cause of stroke, is represented by internal carotid atherosclerosis. Mechanisms by which the atheromatous plaque represents a cause of ischemia involve two factors: the embolic factor and the hemodynamic factor. The embolic factor is consequent on unstable plaques and US plays a major role in plaque characterization. Stenotic plaques are the major cause of the hemodynamic factor. Color Doppler US inables quantification of stenosis and selects surgical patients with greater than 70% stenosis. In internal carotid dissection as the acute cause of cerebrovascular insufficiency color Doppler US findings are significant for early diagnosis and follow-up.