Isshiki T, Umeda T, Machii K, Furuta S
J Cardiogr. 1981 Mar;11(1):13-20.
Twenty-three cases with ruptured chordae tendineae (RCT) of the mitral valve and 9 normal control cases were studied by two-dimensional echocardiography. Mitral valve replacement (MVR) was performed in 13 of the 23 cases. The preoperative diagnosis of RCT was proven accurately at operation in all except 2 cases with bacterial endocarditis. Whether RCT occurred in the antero-lateral or in the postero-medial commissural side could be determined perfectly. RCT was observed in the postero-medial side more often than in the anterolateral side, i.e., postero-medial side in 16 (9 operated) and antero-lateral side in 5 (2 operated). This tendency has also been noted in other Japanese reports regardless of the cause of RCT. In the short axis view at the level of the papillary muscles, the area of the posterior papillary muscles was smaller than the area of the anterior papillary muscles in the RCT cases. It is speculated that the smaller size of the posterior papillary muscles has a certain relation with the more frequent RCT in the postero-medial commissural side.
对23例二尖瓣腱索断裂（RCT）患者和9例正常对照者进行了二维超声心动图研究。23例患者中有13例行二尖瓣置换术（MVR）。除2例细菌性心内膜炎患者外，其余所有患者术前RCT诊断均在手术中得到准确证实。RCT发生在前外侧或后内侧连合侧均可完美确定。RCT在后内侧比在前外侧更常见，即后内侧16例（9例手术），前外侧5例（2例手术）。无论RCT的病因如何，其他日本报告中也指出了这种趋势。在乳头肌水平的短轴视图中，RCT病例中后乳头肌的面积小于前乳头肌的面积。推测后乳头肌较小的尺寸与后内侧连合侧更频繁的RCT有一定关系。
