分别对开胸犬及7例二尖瓣金属瓣置换术后患者利用多普勒组织成像中的速度时间积分曲线对放置钛夹处心肌及二尖瓣环处的长轴运动位移进行定量研究；

Quantitative study was made on time velocity integral(TVI) of the implanted myocardium and left ventricular long axis in 7 canine models, and 7 patients with replaced metal mitral valve.

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目的：建立心肌慢性缺血动物模型，探讨超声背向散射积分（IBS）和多普勒组织成像（DTI）技术检测慢性心肌缺血的价值。

Objective: To establish porcine chronic ischemic myocardium model and to evaluate ultrasonic integrated backscatter(IBS) and Doppler tissue imaging(DTI) in detecting this model.

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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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