Flaherty J T, Livengood S, Fortuin N J
Am J Cardiol. 1975 May;35(5):675-8. doi: 10.1016/0002-9149(75)90055-7.
The echocardiographic diagnosis of mitral stenosis is based on the finding of a decreased early diastolic slope of the anterior mitral leaflet. This finding is also seen in other conditions in which the rate of left ventricular filling is reduced by decreased compliance of the ventricular myocardium rather than by mitral valve obstruction. Patients with "true" mitral stenosis have been differentiated from those with decreased ventricular compliance resulting in "false" mitral stenosis by the direction of movement of the posterior mitral valve leaflet. This report describes a patient with mitral stenosis proved at cardiac catheterization whose echocardiogram showed posterior motion of thickened posterior mitral leaflet during diastole, a finding previously considered to exclude organic mitral stenosis. This false negative echocardiographic finding in proved mitral stenosis has not previously been reported.
二尖瓣狭窄的超声心动图诊断基于二尖瓣前叶舒张早期斜率降低这一发现。在其他一些情况下也会出现这一表现，即由于心室心肌顺应性降低而非二尖瓣梗阻导致左心室充盈速率降低。通过二尖瓣后叶的运动方向，已将患有“真性”二尖瓣狭窄的患者与因心室顺应性降低导致“假性”二尖瓣狭窄的患者区分开来。本报告描述了一名经心导管检查证实患有二尖瓣狭窄的患者，其超声心动图显示增厚的二尖瓣后叶在舒张期向后运动，这一发现以前被认为可排除器质性二尖瓣狭窄。这种已证实的二尖瓣狭窄中超声心动图假阴性的发现此前尚未见报道。
