However, there is no literature to support the use of MRI perfusion in the initial evaluation of the asymptomatic patient with a carotid bruit. MRI Head Without and With IV Contrast There is no relevant literature to support the use of contrast-enhanced MRI of the head in the evaluation of the asymptomatic patient with a carotid bruit. MRI Head Without IV Contrast There is no literature to support MRI of the head in the initial workup for the asymptomatic patient with a carotid bruit. MRI of the head is useful in evaluating for the sequela of carotid stenosis such as clinically silent strokes or microvascular ischemic changes in the setting of an established diagnosis of asymptomatic carotid stenosis. MRV Head Without and With IV Contrast There is no relevant literature to support the use of MRV of the head in the evaluation of the asymptomatic patient with a carotid bruit. MRV Head Without IV Contrast There is no relevant literature to support the use of MRV of the head in the evaluation of the asymptomatic patient with a carotid bruit. US Duplex Doppler Carotid Artery Duplex carotid Doppler is a very accurate and useful screening test in the evaluation of the extracranial vasculature for carotid stenosis in the asymptomatic patient with a carotid bruit, which stratifies patients into groups of mild (<50%), moderate (50%-69%), and severe (>70%) stenosis. Specifically, carotid Doppler has a 90% sensitivity and a 94% specificity in the identification of clinically significant >70% stenosis, which might warrant surgical intervention [111,112,120]. The lack of need for IV contrast decreases the risk to the patient.
Cerebrovascular Diseases Stroke and Stroke Related Conditions PCAs. However, there is no literature to support the use of MRI perfusion in the initial evaluation of the asymptomatic patient with a carotid bruit. MRI Head Without and With IV Contrast There is no relevant literature to support the use of contrast-enhanced MRI of the head in the evaluation of the asymptomatic patient with a carotid bruit. MRI Head Without IV Contrast There is no literature to support MRI of the head in the initial workup for the asymptomatic patient with a carotid bruit. MRI of the head is useful in evaluating for the sequela of carotid stenosis such as clinically silent strokes or microvascular ischemic changes in the setting of an established diagnosis of asymptomatic carotid stenosis. MRV Head Without and With IV Contrast There is no relevant literature to support the use of MRV of the head in the evaluation of the asymptomatic patient with a carotid bruit. MRV Head Without IV Contrast There is no relevant literature to support the use of MRV of the head in the evaluation of the asymptomatic patient with a carotid bruit. US Duplex Doppler Carotid Artery Duplex carotid Doppler is a very accurate and useful screening test in the evaluation of the extracranial vasculature for carotid stenosis in the asymptomatic patient with a carotid bruit, which stratifies patients into groups of mild (<50%), moderate (50%-69%), and severe (>70%) stenosis. Specifically, carotid Doppler has a 90% sensitivity and a 94% specificity in the identification of clinically significant >70% stenosis, which might warrant surgical intervention [111,112,120]. The lack of need for IV contrast decreases the risk to the patient.