Mitas米塔斯MITabbr.麻州理工大学(美)(=Massachusetts Institute of Technology)mitral commissurotome二尖瓣分离手术刀Mitochondrial calcium线粒体钙Mitral valve disorder二尖瓣病症mitral valve stenosis二尖瓣狭窄mitochondrial plasmid线粒体质粒mitigation strategies缓解措施mitochondrial disease线粒体病mitral valve position二尖瓣位置mitral valve echogram二尖瓣回波图, 二尖瓣超声波图MITSUBISHI transducer三菱变频器