速度向量成像技术评价健康成人颈总动脉运动力学的研究

摘要

目的：应用速度向量成像(VVI)技术，探讨健康成人颈总动脉管壁运动特点。方法：将400例正常人按年龄分组，用VVI技术分析各年龄组颈总动脉四个侧壁的收缩期最大峰值运动速度(Vs)、最大切向应变(Smax)及最大切向应变率(SRmax)，并进行比较。结果：各年龄组运动及弹力指标比较，差异有统计学意义(P＜0.05)，各项指标均随年龄增长呈下降趋势。结论：VVI技术可以对不同年龄组颈动脉内膜运动进行可靠的量化评价，提供颈动脉弹性指标的正常参考数据，为临床对血管弹性的评估提供帮助。%Objective:To investigate the characteristics of common carotid artery wall motion in healthy adults using velocity vector imaging(VVI).Methods:400 normal persons were grouped according to age,and we analyzed the peak systolic velocity(Vs), maximum tangential strain(Smax) and maximum tangential strain rate(SRmax) of four side walls of common carotid artery in all age groups by velocity vector imaging,and compared the results.Results:There was significant difference in the exercise and elastic index of all age groups(P<0.05),and each index showed a downward trend with age.Conclusion:VVI technology can be a reliable quantitative evaluation for common carotid artery wall motion of all age groups.It can provide normal reference data of carotid elasticity index,and provide help for clinical evaluation of vascular elasticity.