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AJNR - American Journal of Neuroradiology

Published ahead of print on May 22, 2008
doi: 10.3174/ajnr.A1126

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American Journal of Neuroradiology 29:1590-1593, September 2008
© 2008 American Society of Neuroradiology

INTERVENTIONAL

Carotid Artery Stenting for Calcified Lesions

M. Tsutsumi^a, H. Aikawa^a, M. Onizuka^a, M. Iko^a, T. Kodama^a, K. Nii^a, S. Hamaguchi^a, H. Etou^a, K. Sakamoto^a and K. Kazekawa^a

^a From the Department of Neurosurgery and Neuroradiology, Fukuoka University Chikushi Hospital, Fukuoka, Japan

Please address correspondence to Kiyoshi Kazekawa, MD, PhD, Department of Neurosurgery, Fukuoka University Chikushi Hospital, 1-1-1 Zokumyoin, Chikushino, Fukuoka, 8188502, Japan; e-mail: kazekawa{at}xb3.so-net.ne.jp

BACKGROUND AND PURPOSE: Our aim was to assess the feasibility of carotid artery stent placement (CAS) for calcified lesions.

MATERIALS AND METHODS: Using embolic protection devices (EPDs), we performed 51 CAS procedures in 43 patients with severe carotid artery stenosis accompanied by plaque calcification. Before intervention, all lesions were subjected to multidetector-row CT. The arc of the circumferential plaque calcification was measured on axial source images at the site of maximal luminal stenosis, and the total volume of the plaque calcification was determined. The angiographic outcome immediately after CAS, and intra- and postoperative complications were recorded.

RESULTS: The mean arc of calcification was 201.1 ± 72.3° (range, 76–352°), and the mean of the total calcification volume was 154.9 ± 35.4 mm³ (range, 92–2680 mm³). Balloon rupture occurred in 1 procedure (2.0%) at predilation angioplasty; all 51 CAS procedures were successful without clinical adverse effects. Although there was a correlation between the arc of plaque calcification and residual stenosis (r = 0.6, P < .001), excellent dilation with residual stenosis 30% was achieved in all lesions. There was no correlation between the total volume of calcification and residual stenosis. None of the patients developed stroke or death within 30 days of the CAS procedure.

CONCLUSION: CAS by using EPDs to treat lesions with plaque calcification is feasible even in patients with near-total circumferential plaque calcification.