期刊
REVISTA ESPANOLA DE CARDIOLOGIA
卷 59, 期 1, 页码 20-27出版社
EDICIONES DOYMA S A
DOI: 10.1157/13083645
关键词
restenosis; angioplasty; intravascular ultrasound; fluid dynamics
Introduction and objectives. Local factors may influence neointimal proliferation following conventional stent implantation. In this study, the relationship between wall shear stress and luminal loss after coronary stenting was assessed using a combination of angiography, intravascular ultrasound, and computational fluid dynamics. Patients and method. Seven patients with de novo right coronary lesions treated with conventional (i.e., bare metal) stents were included. Realistic three-dimensional geometric reconstructions were generated off line from angiographic and intravascular ultrasound data both immediately after stenting and at 6-month follow-up. A finite-volume model was used to calculate local wall shear stress within the stent and 4 mm proximally and distally to the stent. The mean coronary ostium entry flow velocity was assumed to be 25 cm/s in all cases. Results. The mean neointimal thickness was 0.29 (0.21) mm. In five cases, weak negative correlations between wall shear stress and neointimal thickness were found: maximum r value =-0.34, minimum r value =-0.11 (P <.001). The neointimal thickness in segments in which the level of wall shear stress was in the lowest quartile was greater than that in segments in which it was in highest quartile, at 0.34 (0.21) mm and 0.27 (0.24) mm (P <.001) for quartiles; 1 and 4, respectively. Conclusions. Low wall shear stress after stenting favors neointimal proliferation both within the stent and at the stent's edges.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据