COLOR-CODED DOPPLER IMAGING OF THE VENA CONTRACTA AS A BASIS FOR QUANTIFICATION OF PURE MITRAL REGURGITATION
COLOR-CODED DOPPLER IMAGING OF THE VENA CONTRACTA AS A BASIS FOR QUANTIFICATION OF PURE MITRAL REGURGITATION
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DOI：
10.1016/0002-9149(94)90232-1
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发表时间：
1994-02-01
影响因子：
2.8
通讯作者：
LUDERITZ, B
中科院分区：
文献类型：
--
作者：
FEHSKE, W;OMRAN, H;LUDERITZ, B
喷流的最西端中心流区被定义为缩脉。该术语也适用于通过功能不全二尖瓣的射流的多普勒彩色成像的收缩区。评价经胸彩色编码多普勒超声心动图测量二尖瓣缩窄静脉大小评估二尖瓣返流（MR）严重程度的临床应用价值。在82例经血管造影证实的MR患者中，78例显示了跨瓣膜的相干血流图像。心尖长轴视图中的最大直径被认为是缩静脉大小的代表值。与最大左房速度像素面积相比，该参数显示与MR的血管造影程度和二尖瓣返流容积有更高的相关性（r = 0.94 vs 0.72，0.83 vs 0.71）。直径为6.5 mm时，鉴别轻度至中度MR和重度MR的阳性和阴性预测准确度最高（分别为88%和96%）。由于缩脉与MR的严重程度直接相关，因此可以得出结论，使用此参数代替最大速度像素面积进行半定量分级是有帮助的。
The narrowest central now region of a jet is defined as the vena contracta. This term is applied also to the contracted zone of the Doppler color now image of a jet at its passage through an incompetent mitral valve. The clinical applicability of measuring the size of the vena contracta by transthoracic color-coded Doppler echocardiography for estimating the severity of mitral regurgitation (MR) was evaluated. In 78 of 82 patients with angiographically proved MR, a coherent flow image across the valve was visualized. The maximal diameter in the apical long-axis view was considered as a representative value for the size of the vena contracta. In comparison with the maximal left atrial velocity pixel area, this parameter revealed higher correlations to the angiographic degree of MR and to the regurgitant volume (r = 0.94 vs 0.72, and 0.83 vs 0.71, respectively). The highest positive and negative predictive accuracies for differentiating mild-to-moderate from severe MR were determined for a diameter of 6.5 mm (88 and 96%, respectively). Because the vena contracta is directly related to the severity of MR, it is concluded that it is helpful to use this parameter instead of the maximal velocity pixel area for semiquantitative grading.