Quantitative assessment of mitral valve apparatus before and after mitral valve surgery by real-time three-dimentional echocardiography
10.3969/j.issn.1000-3606.2013.07.007
- VernacularTitle:二尖瓣成行术后二尖瓣特征参数的三维量化分析
- Author:
Jing WANG
;
Kun SUN
;
Lanping WU
- Publication Type:Journal Article
- Keywords:
real-time three-dimensional echocardiography;
mitral regurgitation;
mitral valve surgery;
child
- From:
Journal of Clinical Pediatrics
2013;(7):618-621
- CountryChina
- Language:Chinese
-
Abstract:
Objectives To evaluate the mechanism of mitral regurgitation after mitral valve surgery by quantitative assessment of mitral valve three-dimensional parameters using real-time three-dimensional echocardiography (RT-3DE). Me-thods According to the improved degree of mitral regurgitation (MR), 30 children were divided into two groups after mitral valve repair:MR improved (I) group and residual MR (II) group. And the pre-operative 3-DE parameters were compared with post-operative parameters in two groups respectively. Results In group I, three dimensional parameters, including mitral valve annular area in end-systole and end-dilate (AA1, AA2), PM papillary muscle annular distance (AL-A), AL papillary muscle annular distance (PM-A), inter-papillary distance (PM-AL), the anterior leaflet and posterior leaflet tethering angles (a1, a2, argAL-C-PM), left ventricular volume end-systole and end-dilate (LVEDV, LVESV) were significantly improved after surgery (P<0.05) while the parameters PM-A, PM-AL, argAL-C-PM, LVEDV, LVESV and left ventricular ejection fraction (LVEF) were not significantly changed after surgery in group II, except for the parameters AA1, AA2 and a2 (P>0.05). Conclusions Most of the mitral valve parameters were much better in group I after surgery. However, the malformation of papillary appa-ratus, leaflet tethering strength and left ventricular function were unchanged in group II, which may be the key mechanism of mitral regurgitation after surgery.
