Study of left ventricular systolic function by vector flow mapping in patients with aortic stenosis retained in ejection fraction
10.3760/cma.j.issn.1004‐4477.2019.03.005
- VernacularTitle:血流向量成像技术对射血分数保留的主动脉瓣狭窄患者左心室收缩功能的研究
- Author:
Ie Ruij LIU
1
;
Yanan LI
;
Ying WANG
;
Cunying CUI
;
Yanbin HU
;
Lin LIU
Author Information
1. 郑州大学人民医院河南省人民医院阜外华中心血管病医院超声科
- Keywords:
Echocardiography;
Aortic stenosis;
Ejection fraction retention;
Vector flow mapping;
Energy loss;
Ventricular function,left
- From:
Chinese Journal of Ultrasonography
2019;28(3):211-217
- CountryChina
- Language:Chinese
-
Abstract:
Objective To quantitatively analyze the changes in left ventricular mean energy loss ( EL ) using blood flow vector imaging ( VFM ) in patients with aortic stenosis retained by ejection fraction . Methods T hirty‐five subjects were selected as the control group ,and 71 patients with aortic stenosis were chosen as the case group ,including mild aortic stenosis ( miAS) group( 23 cases) ,moderate aortic stenosis ( moAS) group( 23 cases) ,and severe arterial stenosis ( seAS) group( 25 cases) . Left atrial anteroposterior diameter ( LAA ) ,left ventricular end‐diastolic diameter ( LVEDD ) ,left ventricular end‐diastolic volume ( LVEDV ) ,left ventricular end‐systolic volume ( LVESV ) ,left ventricular ejection fraction ( LVEF ) and E/A were measured by conventional echocardiography . T he average total EL ( EL‐T ) , average basal segment EL ( EL‐B) ,average middle segment EL ( EL‐M ) and average apical segment EL ( EL‐A ) of each isovolumic contraction phase ( IVC ) and rapid ejection phase ( RE ) were measured by VFM ,and the differences in mean EL among each groups were compared . Results Compared with those in the control group ,average EL‐B ,average EL‐M and average EL‐T in each case group of the left ventricle during IVC and RE were increased ,the average EL‐A in seAS group of the left ventricle during IVC were increased ,and the differences were statistically significant( all P ＜0 .05) . Compared with those in miAS group ,the average EL‐B ,average EL‐M and average EL‐T in seAS group of the left ventricle during IVC and RE were increased ,and the differences were statistically significant ( all P ＜ 0 .05 ) . Compared with those in miAS group ,the average EL‐A in moAS group and seAS group of the left ventricle during RE were increased ,and the differences were statistically significant ( all P ＜ 0 .05 ) . Conclusions VFM technology can directly reflect the hemodynamic changes in the left ventricular chamber of patients with aortic stenosis retained by ejection fraction ,and provide a new method for the evaluation of left ventricular systolic function in patients with aortic stenosis .
