PMID: 6410830May 1, 1983Paper

Duplex sonography in the evaluation of carotid artery disease.

AJNR. American Journal of Neuroradiology
J N DreisbachR J Daigle

Abstract

High-resolution duplex sonography was compared with biplane magnified carotid angiography in a prospective evaluation of 161 carotid arteries in 86 patients. The duplex scanner combined real-time B-mode imaging (7.5 MHz) with simultaneous range-gated pulsed Doppler frequency analysis (3 MHz). The degree of stenosis was usually determined by the true and residual lumen of the carotid artery at the atherosclerotic plaque on the transverse image. The Doppler frequency signals were automatically converted to velocity data by a minicomputer. The accuracy of the duplex system in detecting and assessing stenoses graded in 20% increments is demonstrated according to specificity, sensitivity, and positive and negative predictive value by both cumulative and subgroup analyses. A 93.7% sensitivity was shown for minimal (0-20%) stenosis and 100% sensitivity for severe (greater than 60%) stenosis. An apparent limitation of duplex sonography is the differentiation of a high-grade stenosis from occlusion (sensitivity, 82.6%; positive predictive value, 90.4%).

Related Concepts

Related Feeds

Atherosclerosis Disease Progression

Atherosclerosis is the buildup of plaque on artery walls, causing stenosis which can eventually lead to clinically apparent cardiovascular disease. Find the latest research on atherosclerosis disease progression here.

Carotid Artery Diseases

Carotid artery disease is a group of pathological conditions of the carotid artery. Discover the latest research on carotid artery disease here.

Related Papers

Canadian Association of Radiologists Journal = Journal L'Association Canadienne Des Radiologistes
C S LeviJ E Marantz
Stroke; a Journal of Cerebral Circulation
W J ZwiebelJ F Sackett
Ultrasound in Medicine & Biology
D E Strandness
© 2021 Meta ULC. All rights reserved