壁运动各项指标在评价健康成人颈总动脉弹性中的作用

目的比较壁运动时间指标、速度指标及加、减速度指标对健康成人颈总动脉(CCA)弹性的评价作用.方法测量105例健康成人血压,连接心电图,行右CCA超声检查.采用组织多普勒技术记录CCA壁运动曲线,应用MedArchive Viewer软件进行CCA壁运动的加速度前时间、加速度时间、减速度时间、峰值速度、加速度及减速度的测定,计算获得弹性参数.通过因子分析将诸项弹性参数合并生成弹性因子.将弹性因子与壁运动诸项指标进行简单直线相关分析及多元线性回归分析.结果时间因子(T)、速度因子(Ⅴ)、加速度因子(A)、减速度因子(D)与弹性因子的相关系数r分别为0.132、0.680、0.735、0.485.V、A、D的回归系数分别为0.757、0.401、-0.459,回归方程为:Y=0.757V 0.401A-0.459D.结论壁运动中速度指标、加速度指标与减速度指标均可用来评价CCA弹性.其中速度指标和弹性关系最密切,最能代表弹性,壁运动速度越快弹性越好.加速度指标与减速度指标和弹性关系其次.而时间指标与弹性无关.

Each index of common carotid artery walls pulsate for evaluating common carotid artery elasticity in healthy adult

Objective To compare time, velocity, accelerate and decelerate indexes of common carotid artery (CCA) walls pulsate for evaluating CCA elasticity in healthy adult. Methods Blood pressure and R-CCA were studied (by ultrasound with simultaneous ECG monitoring) in 105 healthy adults. The curve of CCA walls pulsate was recorded by the technology of tissue Doppler imaging. MedArchive Viewer software was used to measure time, velocity, acceleration and deceleration. The correlation indicators of CCA elasticity was calculated. Factor analysis can be used to combine the correlation indicators of CCA elasticity to elastic factor. Elastic factor and indexes of CCA walls pulsate were disposed by Bivarite Correlations Analyze and Linear Regression Analyze. Results The correlation coefficients between time factor (T), velocity factor (V), accelerate factor (A), decelerate factor (D) and elastic factor were 0.132, 0.680, 0.735, 0.485, respectively. The regression equation: Y=0.757V+0.401A-0.459D. Conclusion Velocity index, accelerate index and decelerate index of CCA walls pulsate all can be used for evaluating CCA elasticity of healthy adult. The velocity index was the closest index related with elasticity and was the best representation in all indexes of CCA walls pulsate. The rapider velocity of CCA walls pulsate was, the better elasticity was. The relations between accelerate index, decelerate index and elasticity were in the next place. There was no relation between time index and elasticity.