Study on the left ventricular flow in patients with bileaflet prosthesis mitral valve by vector flow mapping using Doppler echocardiography
10.3760/cma.j.issn.1004-4477.2011.04.001
- VernacularTitle:超声向量血流图对二叶式人工机械瓣置换术后左心室流场的研究
- Author:
Zhuo CHEN
;
Zhian LI
;
Yihua HE
;
Jie HAN
;
Ye ZHANG
;
Xiaoyan GU
;
Chao XUE
- Publication Type:Journal Article
- Keywords:
Echocardiography;
Heart valve,prosthesis;
Ventricular function,left;
Vector flow mapping
- From:
Chinese Journal of Ultrasonography
2011;20(4):277-281
- CountryChina
- Language:Chinese
-
Abstract:
Objective To compare the formation and evolution of left ventricular flow between the patients with the bileaflet artificial mechanical mitral valve and normal adult using vector flow mapping (VFM). Methods Thirty healthy controls and 30 severe mitral stenosis patients with bileaflet prosthesis mitral valve were involved. The left ventricular flow and the vortex description parameters were comparatively studied between two groups. Results Two small symmetric rotating vortexes and a big counter-clockwise rotating vortex appeared alternately in the left ventricular through cardiac cycle with control group. In case group,only large vortex could be seen in the mid-late diastolic and maximum vector velocity was faster than that in control group in statistics( P <0. 05). Especially the postoperative direction of blood flow was clockwise shif ting from the interventricular septum to the posterior and lateral left ventricular wall inversely to control group. Conclusions VFM can show the complex vortex flow patterns in left ventricular in the patients with bileaflet prosthesis mitral valve preliminarily and may be useful to assess and improve the function of prosthesis valve in future.
