Pai R G, Tanimoto M, Jintapakorn W, Azevedo J, Pandian N G, Shah P M
Section of Cardiology, Loma Linda VA Medical Center, CA 92357, USA.
J Heart Valve Dis. 1995 Nov;4(6):623-7.
Mitral annulus anatomy and dynamics were evaluated in 12 subjects using a three-dimensional transesophageal echocardiographic technique. The mitral annular area, diameters and distance from the left ventricular apex were measured in end-diastole, mid-systole, end-systole and mid-diastole. The mitral annulus had its largest area in end-systole and the smallest area in end-diastole. The shape of the annulus changed during the cardiac cycle with the maximal change occurring in the diameters passing close to the middle of the mitral leaflets. In the vertical plane, the annulus had a shallow ski-slope shape, with the attachment of the anterior leaflet being farthest from the apex. In other words, the highest point of the annulus was situated anteromedially and was visualized in the long axis imaging plane.
使用三维经食管超声心动图技术对12名受试者的二尖瓣环解剖结构和动力学进行了评估。在舒张末期、收缩中期、收缩末期和舒张中期测量二尖瓣环面积、直径以及距左心室心尖的距离。二尖瓣环在收缩末期面积最大，在舒张末期面积最小。瓣环形状在心动周期中发生变化，最大变化发生在靠近二尖瓣叶中部的直径处。在垂直平面上，瓣环呈浅滑雪坡状，前叶附着点离心尖最远。换句话说，瓣环的最高点位于前内侧，在长轴成像平面中可见。
