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| Evaluation of the degree of mitral regurgitation in dilated cardiomyopathy and mitral valve prolapse using three-dimensional color Doppler echocardiography |
| HAN Yu-na, CHEN Xin, WANG Xiao-bing, ZHOU Wen-yan, CUI Yi-jing, ZHANG Hui-hui, YANG Jun |
| Department of Cardiovascular Ultrasound Imaging, the First Hospital of China Medical University, Shenyang 110001, China |
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Abstract Objective: To investigate the value of three-dimensional color Doppler echocardiography(3D-CDE) in measuring the regurgitant orifice area(ROA) of mitral regurgitation(MR) in an en-face view to estimate the MR degree of different regurgitation mechanism. Methods: We selected 30 patients of mitral valve prolapse(MVP) and 30 patients of dilated cardiomyopathy(DCM) with different regurgitation degree. The 2D integrative method recommended by the ASE was used as the reference standard for MR grading in the 60 patients. Each patient’s ROA by 3D-ROA method and 2D-PISA method were measured respectively, and the correlation of the two methods was analysed. Results: The shape of the regurgitation orifice and the three-dimensional morphology of PISA was very different. There were correlations between the 2D-PISA and 3D-ROA method in the DCM group(r=0.783, Y=0.661x-0.45, P<0.001). However, in the MVP group, the relationship between the values by the 2D-PISA and 3D-ROA method was close to the line of identity(r=0.924, Y=1.172x-0.057, P<0.001). The 2D-PISA method underestimated the 3D-ROA by 26% in the DCM group. Conclusion: Compared with traditional 2D methods, 3D-ROA method can be more intuitive, more accurate in evaluating functional MR.
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Received: 06 June 2014
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Corresponding Authors:
CHEN Xin
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2014, Vol. 25 
