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From the Department of Neurology, Bowman Gray School of Medicine of Wake Forest University, Winston-Salem, NC.
A 66-year-old woman had an asymptomatic bruit over the right carotid bifurcation. Carotid Doppler and real-time ultrasound studies demonstrated an isolated 50 to 75% stenosis of the right external carotid artery. We devised a simple clinical maneuver to determine which artery, internal or external carotid, caused the bruit.
Address correspondence to Dr. Reed, 301 S. 7th Ave., Suite 235, West Reading, PA 19611.
Accepted for publication September 23, 1980.
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