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Predictive Value of Carotid Bruit for Carotid Atherosclerosis
Timothy J. Ingall, MB BS, PhD, FRACP;
Daniel Homer, MD;
Jack P. Whisnant, MD;
H. L. Baker, Jr, MD;
W. M. O'Fallon, PhD
Arch Neurol. 1989;46(4):418-422.
Abstract
• To assess the predictive value of carotid bruit for moderate-to-severe carotid atherosclerosis, the results of carotid arteriograms performed on 1004 subjects were correlated with the findings of auscultation of the carotid arteries. Predictive values of carotid bruit for ipsilateral extracranial carotid atherosclerosis were 77% for localized bruits and 74% for diffuse bruits. The predictive values of extracranial carotid bruit for ipsilateral intracranial carotid atherosclerosis were 16% for localized bruits and 18% for diffuse bruits. Assessing both carotid arteries together, the predictive value of carotid bruit for moderate-to-severe atherosclerosis at any extracranial carotid site was 85% there being no difference whether the bruits were diffuse, localized, bilateral, or unilateral. Diffuse or localized bruits, whether unilateral or bilateral, are equally predictive of moderate-to-severe atherosclerosis in the extracranial carotid artery, but both are poor predictors of intracranial carotid artery disease.
Author Affiliations
From the Departments of Neurology (Drs Ingall, Homer, and Whisnant), Health Sciences Research (Drs Ingall, Homer, Whisnant, and O'Fallon), and Diagnostic Radiology (Dr Baker), Mayo Clinic and Mayo Foundation, Rochester, Minn. Dr Homer is now with the Department of Neurology, Evanston (Ill) Hospital.
Footnotes
Accepted for publication Aug 22, 1988.
Read in part before the American Academy of Neurology Meeting, Cincinnati, April 17, 1988.
Reprint requests to Mayo Clinic, Department of Health Sciences Research, 200 First St SW, Rochester, MN 55905 (Dr Whisnant).
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