title: [Stenosis of the internal carotid artery at the bifurcation. Radiologic definition and Doppler diagnosis].
abstract: One hundred internal carotid arteries with varying degrees of stenosis were studied by angiography and doppler ultrasound. We found the minimal diameter of a stenosis, measured in mm, more suitable as reference for the doppler-based method than verbal assessment of a stenosis as slight, moderate or pronounced. The sensitivity and specificity of maximal blood velocity to diagnose high-grade stenosis is satisfactory for screening patients who might benefit from endarterectomy. Spectral velocity spread, or comparison of the velocity in the stenosis with that of a cranial reference segment of the artery did not increase the sensitivity to detect low-grade stenoses.
authors.affiliation: Nevrologisk avdeling, Medisinsk klinikk, Ullevål sykehus, Oslo.
authors.forename: H J
authors.initials: HJ
authors.lastname: Nordal
authors.forename: K F
authors.initials: KF
authors.lastname: Amthor
authors.forename: R
authors.initials: R
authors.lastname: Dullerud
mesh_terms: D000328:Adult; D000368:Aged; D001783:Blood Flow Velocity; D002343:Carotid Artery, Internal / Q000000981:diagnostic imaging; D016893:Carotid Stenosis / Q000175:diagnosis* / Q000000981:diagnostic imaging; D015150:Echocardiography, Doppler; D006801:Humans; D008875:Middle Aged; D011859:Radiography
vernacular_title: Stenose av arteria carotis interna ved carotisbifurkaturen. Radiologisk definisjon og dopplerdiagnostikk.