Muzzi Ruthnéa Al, de Araújo Roberto B, Muzzi Leonardo Al, Pena José Lb, Silva Euler Fraga
Postal Box 37, Lavras, Minas Gerais state.
J Vet Cardiol. 2003 Nov;5(2):33-8. doi: 10.1016/S1760-2734(06)70050-9.
This study was performed to test the hypothesis that measurements of jet area by Doppler color flow imaging will correlate with the severity of mitral regurgitation.
Although Doppler color flow imaging is widely used to assess the severity of mitral regurgitation (MR), an accurate and quantitative marker of MR by color flow mapping remains elusive.
61 dogs with mitral regurgitation were evaluated by complete color Doppler studies. There were 42 males and 19 females, ranging from 6 to 18 years old (mean 11.19 +/- 2.51). Results of regurgitant jet area were compared with regurgitant volume and fraction by pulsed Doppler subtraction of mitral and aortic flows. They were also compared with effective regurgitant orifice area. Regurgitant jet area correlated well with both Doppler regurgitant volume and effective regurgitant orifice area. There were significant differences in jet area between groups of dogs with different severity of clinical signs of congestive heart failure (p < .001).
Our results demonstrate that careful color flow mapping of the regurgitant jet area provides a simple quantitative assessment of MR that correlates well with other quantitative Doppler techniques.
本研究旨在验证一个假设，即通过多普勒彩色血流成像测量射流面积与二尖瓣反流的严重程度相关。
尽管多普勒彩色血流成像被广泛用于评估二尖瓣反流（MR）的严重程度，但通过彩色血流图准确、定量地标记MR仍然难以实现。
对61只患有二尖瓣反流的犬进行了完整的彩色多普勒研究。其中雄性42只，雌性19只，年龄在6至18岁之间（平均11.19±2.51岁）。通过二尖瓣和主动脉血流的脉冲多普勒减法，将反流射流面积的结果与反流容积和反流分数进行比较。还将它们与有效反流口面积进行比较。反流射流面积与多普勒反流容积和有效反流口面积均密切相关。在患有不同严重程度充血性心力衰竭临床体征的犬组之间，射流面积存在显著差异（p <.001）。
我们的结果表明，对反流射流面积进行仔细的彩色血流图绘制可为MR提供简单的定量评估，且与其他定量多普勒技术密切相关。
