Chocardiographic assessent of regional left ventricular function after mitral valve replacement with and without chordal preservation by strain rate imaging
10.3877/cma.j.issn.1672-6448.2013.08.008
- VernacularTitle:组织多普勒应变率成像技术评价不同二尖瓣置换术式左心室局部心肌功能变化
- Author:
Yong, GUO
;
Yi-hua, HE
;
Zhi-an, LI
;
Chun, ZHANG
;
Ye, ZHANG
;
Xiao-yan, GU
;
Jian-cheng, HAN
;
Zhuo, CHEN
- Publication Type:Journal Article
- Keywords:
Echocardiography,Doppler;
Heart valve prosthesis implantation;
Ventricular function,left
- From:
Chinese Journal of Medical Ultrasound (Electronic Edition)
2013;(8):628-632
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the regional left ventricular function after mitral valve replacement with and without chordal preservation by strain rate imaging. Methods A total of 55 patients undergoing mitral valve replacement were enrolled. Twenty underwent complete excision of the subvalvular apparatus (group A), 20 preserved the posterior chordopapillary apparatus only (group B) and the other 15 underwent total chordal preservation (group C). Systolic peak strain rate (SRs) were measured preoperatively, at 7-10 days and 3 months after operation. Results Before operation, SRs had no differences between different segments of the left ventricular in each group (F=0.37, 0.74, 0.90, all P>0.05). At 7-10 days after operation, SRs in the most segments of left ventricular were signiifcantly lower than those of before operation (F=3.91, 8.12, 7.57, all P<0.05). At 3 months after operation, SRs in some segments of left ventricular were signiifcantly higher than those of preoperation in each group (t=2.12, 3.19, 3.25, 2.08, 2.78, 4.79, 2.81, 2.58, 2.87, 1.60, 0.34, 1.04, 0.73, 0.70, 1.68, all P<0.05). SRs had no signiifcant differences between each segment of left ventricular in group C (F=1.76, P>0.05). By contrast, SRs in some segments of left ventricular were different from those of other segments in group A and group B (F=17.8, 8.52, both P<0.05). Conclusion Comparing to conventional mitral valve replacement and mitral valve replacement with preservation of posterior subvalvular apparatus, mitral valve replacement with preservation of total subvalvular apparatus makes the papiltary function preserved completely, which are beneifcial for the motor coordination of left ventricular wall and the recovery of regional left ventricular function.
