open access

Vol 67, No 3 (2008)
ORIGINAL ARTICLES
Published online: 2008-06-02
Submitted: 2012-02-06
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The diagnostic value of the resistivity index of the common carotid arteries in severe internal carotid artery stenosis

A.B. Shakeri, S. Zarrintan, M. Shakeri-Bavil
Folia Morphol 2008;67(3):175-178.

open access

Vol 67, No 3 (2008)
ORIGINAL ARTICLES
Published online: 2008-06-02
Submitted: 2012-02-06

Abstract

Duplex ultrasound is currently used both for screening and for preoperative assessment of the carotid arteries and has completely replaced carotid angiography for the latter purpose in many institutions. The study aimed to identify resistivity index abnormalities in the common carotid arteries in patients with occluded or severely stenosed internal carotid arteries. Sixteen patients with severe internal carotid artery stenosis or occlusion over a twelve-month period were studied by duplex ultrasonography. The resistivity index in the common carotid artery was 0.85 ± 0.03 on the stenotic side compared to 0.74 ± 0.04 on the opposite side (p < 0.05). There was no side difference regarding flow velocity. In patients with occluded or severely stenosed internal carotid arteries compensatory vasodilation occurs in cerebral vessels on the same side, and this is also significant, resulting in a decrease in the resistivity index in the common carotid artery of the opposite side.

Abstract

Duplex ultrasound is currently used both for screening and for preoperative assessment of the carotid arteries and has completely replaced carotid angiography for the latter purpose in many institutions. The study aimed to identify resistivity index abnormalities in the common carotid arteries in patients with occluded or severely stenosed internal carotid arteries. Sixteen patients with severe internal carotid artery stenosis or occlusion over a twelve-month period were studied by duplex ultrasonography. The resistivity index in the common carotid artery was 0.85 ± 0.03 on the stenotic side compared to 0.74 ± 0.04 on the opposite side (p < 0.05). There was no side difference regarding flow velocity. In patients with occluded or severely stenosed internal carotid arteries compensatory vasodilation occurs in cerebral vessels on the same side, and this is also significant, resulting in a decrease in the resistivity index in the common carotid artery of the opposite side.
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Keywords

internal carotid artery; common carotid artery; stenosis; duplex sonography; peak systolic velocity

About this article
Title

The diagnostic value of the resistivity index of the common carotid arteries in severe internal carotid artery stenosis

Journal

Folia Morphologica

Issue

Vol 67, No 3 (2008)

Pages

175-178

Published online

2008-06-02

Bibliographic record

Folia Morphol 2008;67(3):175-178.

Keywords

internal carotid artery
common carotid artery
stenosis
duplex sonography
peak systolic velocity

Authors

A.B. Shakeri
S. Zarrintan
M. Shakeri-Bavil

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