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.
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.
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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