结论：心脏病患者的CVHI指标变化特征主要表现为血流速度减慢、外周阻力升高和脑血管功能积分降低。

CONCLUSION: The main characteristics of CVHI indexes include less blood velocity, increased peripheral resistance and decreased integral scores of cerebral vascular function.

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目的探讨体外模拟心脏运动对多普勒血流流速曲线速度时间积分(VTI)测定的影响。

Objective To investigate the influence of simulated heart motion on the Doppler spectrum velocity - time integral (VTI) of simulated blood flow measurements through an in vitro model.

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