改变模拟冠状血管的狭窄程度，使用超声血流检测仪测量不同狭窄程度时移植血管的即时血流量。
Adjust different degrees of stenosis, and measure the transient time blood flow of bypassed grafts in different degrees of stenosis with transient time flow measurement (TTFM).
改变模拟冠状血管的狭窄程度，使用超声血流检测仪测量不同狭窄程度时移植血管的即时血流量。
Adjust different degrees of stenosis, and measure the transient time blood flow of bypassed grafts in different degrees of stenosis with transient time flow measurement (TTFM).
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