研究者发现，“成功的瓣膜植入可明显降低经主动脉瓣口的压力梯度。”
"Successful device implantation resulted in a marked reduction of aortic transvalvular gradients, " the investigators found.
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。
Methods: Doppler ultrasonic diagnostic apparatus was used to observe the form, echo, activity and blood flow.
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