Onishchenko E F
Klin Med (Mosk). 1992 Sep-Oct;70(9-10):41-5.
To specify the role of morphofunctional features of mitral chorda in forming innocent cardiac murmur (ICM), 107 and 20 young men with or without ICM, respectively, were examined clinically and instrumentally at rest, muscular load and hyperventilation. Echocardiography was recorded in one-dimentional, sectoral and Doppler regimens. Fluttering chorda (FC) of the mitral valve (MV) manifesting by hyperkinesia of usually fixed MV chorda, its early systolic dislocation into the left ventricular outflow tract was registered in 34.5% of ICM patients, 11.2% of them had echocardiographic evidence of the chordal shift in the systole into the above tract. In ICM-free subjects the phenomenon FC and the systolic chordal shift were absent (the difference was significant, p < 0.05). The FC phenomenon is attributed to local dysfunction of the papillary muscles and may produce distinct labile nonregurgitation systolic murmur.
为明确二尖瓣腱索形态功能特征在生理性心脏杂音（ICM）形成中的作用，分别对107名有ICM和20名无ICM的年轻男性在静息、运动负荷及过度通气状态下进行了临床和仪器检查。采用一维、扇形和多普勒模式记录超声心动图。二尖瓣（MV）的扑动腱索（FC）表现为通常固定的MV腱索运动亢进，其在收缩早期移位至左心室流出道，在34.5%的ICM患者中被记录到，其中11.2%的患者有腱索在收缩期移位至上述通道的超声心动图证据。在无ICM的受试者中，不存在FC现象和腱索收缩期移位（差异有统计学意义，p<0.05）。FC现象归因于乳头肌的局部功能障碍，可能产生明显的不稳定的非反流性收缩期杂音。
