但是，对人工寰齿关节置换术后寰枢关节的详细运动形式是否完全符合生理要求尚不能定论。
But the detailed way of movement and whether it completely correspond with the demand of physiology are still unclear.
目的探讨保留瓣下结构对二尖瓣置换术后室壁运动的影响。
Objective To appraise the effects of regional wall motion of left ventricle after mitral valve replacement with or without preservation of subvalvular apparatus.
分别对开胸犬及7例二尖瓣金属瓣置换术后患者利用多普勒组织成像中的速度时间积分曲线对放置钛夹处心肌及二尖瓣环处的长轴运动位移进行定量研究；
Quantitative study was made on time velocity integral(TVI) of the implanted myocardium and left ventricular long axis in 7 canine models, and 7 patients with replaced metal mitral valve.
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