The first annular surface defines, at least in part, a first brake chamber.

第一环形表面至少部分地限定第一制动室。

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The second annular surface defines, at least in part, a second brake chamber.

第二环形表面至少部分地限定第二制动室。

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Methods Mitral annular motion in 33 cases of normal subjects form apical four-chamber view and two-chamber view were detected with DTI-M mode.

方法通过DTI - M型模式检测33例健康人心尖四腔观和二腔观二尖瓣环后瓣叶外侧缘的运动。

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