速度向量成像对颈动脉偏心软斑块运动同步性的评价

摘要

目的 应用速度向量成像(VVI)评价伴有偏心软斑块的颈动脉壁的运动同步性.方法 使用Acuson Sequoia 512 彩超仪,对72例伴有颈动脉偏心软斑的脑梗死患者进行超声检查,结合同步心电图描记,在软斑水平取颈总动脉短轴切面,清晰显示斑块及颈动脉各壁后进行图像动态存储,运用VVI软件进行自动分析,分别自动给出颈动脉短轴切面6个节段的达峰时间(TTP),计算达峰时间指数(TTPI).同时设立健康对照组24例加以比较分析.结果 ①颈动脉软斑组的TTPI明显高于健康对照组(P＜0.001);②以TTPI＜0.595来评价颈动脉壁运动同步性的灵敏性为93.9%,特异性为91.7%.结论 ⅤⅥ技术为评价颈动脉壁运动同步性提供了新的工具.%Objective To study the synchronization of carotid artery wall motion with atheroscleroticsoft eccentric plaque using velocity vector imaging(ⅤⅥ). Methods Seventy-two patients with carotid artery atherosclerotic soft eccentric plaque were enrolled in this study. Their carotid arteries were examined using Acuson Sequoia 512 instrument respectively.Combined with ECG,two dimensional imaging of short axis view of carotid artery atherosclerotic soft eccentric plaque were recorded and analyzed on-line using ⅤⅥ software. The carotid artery wall of short axis was automatically divided into 6 segments. Time to peak index (TTPI)was calculated respectively. Results The TTPI was significantly higher than that of control group (P＜0.001). A cut-off value＜0.595 of TTPI for assessing the synchronization of carotid artery wall motion had a sensitivity of 93.9%,a specificity of 91.7%,respectively. Conclusions ⅤⅥ provides a new tool to assess the synchronization of arterial wall motion.