Methods: Doppler ultrasonic diagnostic apparatus was used to observe the form, echo, activity and blood flow.

方法应用彩色多普勒超声诊断仪观察心脏瓣膜形态、回声、活动状态、瓣口血流情况。

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Methods: Doppler ultrasonic diagnostic apparatus was used to observe the form, echo, activity and blood flow.

方法应用彩色多普勒超声诊断仪观察心脏瓣膜形态、回声、活动状态、瓣口血流情况。

youdao