NAKAGAWA Nobuhiro; FUKAWA Norihito; TERAMOTO Yoshihumi; TSUJI Kiyoshi; KIMOTO Atsushi; SANADA Yasuhiro; KATO Amami
Journal of Neuroendovascular Therapy The Japanese Society for Neuroendovascular Therapy 3 (3) 159 - 164 1882-4072 2009/12
Objective: The goal of the study is to investigate the effect of carotid artery stenting (CAS) without post-stent balloon dilatation on reduction of the rate of stenosis.Methods: The subjects were 10 patients (11 lesions) in whom cerebral angiography in follow-up (mean: 13.7 months, range: 0.5 to 24 months) could be performed after CAS. The residual stenosis rates were evaluated before and immediately after CAS and during follow-up. The difference in the reduction of stenosis after CAS without postdilatation in the presence and absence of plaque calcification was also examined.Results: The stenosis rates (meanSD) before and immediately after CAS were 87.311.0% and 30.15.7%, respectively. The residual stenosis rate on follow-up cerebral angiography was 12.316.1% (P<0.003). In lesions with calcification, the residual stenosis rates immediately after CAS and on follow-up angiography were 29.05.2 and 24.39.5%, respectively, showing only a slight improvement. However, in non-calcified lesions, the residual stenosis rate decreased markedly from 28.26.1% to 7.19.9%.Conclusion: CAS without postdilatation may reduce the stenosis rate over time, especially in non-calcified lesions.