Koga Y, Toshima H, Kimura N, Ohishi K, Koga M
Jpn Circ J. 1977 Sep;41(9):975-82. doi: 10.1253/jcj.41.975.
M-mode scan echocardiographic studies of the mitral valve were performed in order to investigate structural architecture of the diseased mitral valve. Structural lesion of the mitral valve was assessed by the echo-pattern change, an increase in number or thickness of the diastolic mitral echo complex. The echo-pattern was classified into 4 grades according to number or thickness of the mitral echoes. The echo-pattern grade correlated with the degree of the structural lesion of 21 surgically excised mitral valves. Clinically, the echo-pattern grade was compared with subsequent operative procedure in 56 cases with pure or predominant mitral stenosis (42 open commissurotomy, 14 valve replacement). Grade I or grade II echo-pattern was a good indicator for mitral commissurotomy. Grade IV pattern was a reliable criterion for valve replacement. Mitral valve replacement should be also considered in cases with grade III pattern, 38% of whom underwent valve replacement. C-E amplitude of the mitral valve was not a useful parameter in assessing the surgical procedure. Thus, the echo-pattern obtained by M-mode scan technique appeared to be of valve in planning the surgical approach for patients with pure or predominant mitral stenosis.
为了研究病变二尖瓣的结构构造，进行了二尖瓣的M型扫描超声心动图研究。通过回声模式改变、舒张期二尖瓣回声复合体数量或厚度增加来评估二尖瓣的结构病变。根据二尖瓣回声的数量或厚度，将回声模式分为4级。回声模式分级与21个手术切除的二尖瓣的结构病变程度相关。临床上，将56例单纯或主要为二尖瓣狭窄患者（42例行直视二尖瓣交界切开术，14例行瓣膜置换术）的回声模式分级与后续手术方式进行了比较。I级或II级回声模式是二尖瓣交界切开术的良好指标。IV级模式是瓣膜置换的可靠标准。III级模式的病例也应考虑行二尖瓣置换术，其中38%接受了瓣膜置换。二尖瓣的C-E幅度在评估手术方式时不是一个有用的参数。因此，M型扫描技术获得的回声模式似乎在为单纯或主要为二尖瓣狭窄患者规划手术方法时对瓣膜情况有参考价值。
