Purpose To evaluate the role of three-dimensional echocardiography in mitral valve repair.
目的评价动态三维超声心动图在二尖瓣修复术中的作用。
If the restricted environmental space, use multi-purpose solenoid valve, which eliminates the need to manually bypass valve and three-line maintenance and user-friendly.
环境空间若受限制，请选用多功能电磁阀，因其省去了旁路及三只手动阀且便于在线维修。
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