Objective: To evaluate the effect of preservation of the entire mitral subvalvular apparatus during double valve replacement on left ventricular functions.

目的：评价保留二尖瓣全瓣下结构对双瓣替换者术后左心功能的影响。

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Objective To appraise the effects of regional wall motion of left ventricle after mitral valve replacement with or without preservation of subvalvular apparatus.

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。

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Conclusion Miral valve replacement with preservation of posterior subvalvular apparatus is beneficial for renewing cardiac function and for a long-term improvement of cardiac function.

结论二尖瓣置换保留后瓣及瓣下结构有助于术后心功能改善和长期改善心功能。

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