Wilansky S, Martin S L, Gaos C M, Jin B S, Hall R J, Cooley D A
Texas Heart Institute, St. Luke's Episcopal Hospital, Houston.
Tex Heart Inst J. 1994;21(3):189-92.
This study was undertaken to compare pressure half-time and continuity equation methods in the postoperative evaluation of anuloplasty rings. We performed 2-dimensional echocardiography and Doppler studies in 39 patients who had undergone valve repair for mitral regurgitation. In patients with a pressure half-time of 110 msec or more (9/39), there was no significant difference in calculated valve area between the 2 methods (p = 0.696). A significant difference was shown between the 2 methods (p < 0.001) in patients with a half-time less than 110 msec (30/39). When patients were classified according to the type of ring they had received, no significant difference was noted between the 2 groups with regard to peak and mean mitral gradients. In patients placed in subgroups according to half-times of less than 110 msec and half-times of 110 msec or more, no difference was noted between groups in terms of mean mitral gradient, presence of mitral regurgitation, left atrial size, left ventricular function, or heart rate. The continuity equation appears to provide much more homogeneous results in the calculation of valve area in patients who have undergone valvular repair for mitral valve regurgitation.
本研究旨在比较压力半衰期法和连续方程法在二尖瓣成形环术后评估中的应用。我们对39例因二尖瓣反流接受瓣膜修复术的患者进行了二维超声心动图和多普勒研究。在压力半衰期为110毫秒或更长时间的患者中（9/39），两种方法计算出的瓣膜面积无显著差异（p = 0.696）。在压力半衰期小于110毫秒的患者中（30/39），两种方法之间存在显著差异（p < 0.001）。当根据患者所接受的成形环类型进行分类时，两组在二尖瓣峰值和平均梯度方面无显著差异。在根据压力半衰期小于110毫秒和110毫秒或更长时间分为亚组的患者中，两组在平均二尖瓣梯度、二尖瓣反流的存在、左心房大小、左心室功能或心率方面无差异。在对二尖瓣反流进行瓣膜修复的患者中，连续方程法在计算瓣膜面积时似乎能提供更一致的结果。
