Left ventricular energy loss during systole in patients with hypertension detected by ultrasonic vector flow mapping
10.3760/cma.j.issn.1004-4477.2018.01.001
- VernacularTitle:血流向量成像技术评价高血压患者左心室收缩期能量损耗
- Author:
Yun XU
1
;
Lixue YIN
;
Yi WANG
;
Rongchuan MA
;
Ling XIE
Author Information
1. 西南医科大学
- Keywords:
Echocardiography;
Hypertension;
Ventricular function;
left;
Vector flow mapping
- From:
Chinese Journal of Ultrasonography
2018;27(1):1-5
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the value of left ventricular energy loss (EL) in the systolic left ventricular hemodynamic changes in hypertensive patients by ultrasonic flow vector imaging (VFM). Methods Ninty-eight hypertensive patients were divided into non left ventricular hypertrophy group (NLVH group) and left ventricular hypertrophy group (LVH group) according to the left ventricular mass index(LVMI).Thirty-one healthy adults were erolled as control group.The average total energy loss (EL-T),basal energy loss (EL-B),middle energy loss (EL-M) and apical energy loss (EL-A) of each isovolumic contraction phase,fast ejection phase and slow ejection phase were obtained by VFM,the difference among the three groups were compared.Results ①EL-T and EL-B in isovolumic phase,rapid ejection phase and slow ejection phase in NLVH group were higher than those in control group ( P <0.05 or P <0.01);EL-T,EL-B,EL-M and EL-A in isovolumic phase,rapid ejection phase and slow ejection phase in LVH group were all higher than those in control group ( P <0.05 or P <0.01);EL-M in isovolumic phase and rapid ejection phase,EL-T,EL-B,EL-M and EL-A in slow ejection phase in LVH group were higher than those in the NLVH group ( P <0.05 or P <0.01).② There was a positive correlation between EL-T and LVMI (r=0.311, P < 0.01),EL-B and LVMI ( r = 0.219, P < 0.05),EL-M and LVMI( r = 0.207, P <0.05),EL-T and LVEF( r = 0.340, P < 0.05),EL-B and LVEF( r = 0.367, P < 0.01) in isovolumic contraction phase.There was a positive correlation between EL-B and LVEF( r = 0.359, P < 0.01) in rapid ejection phase.There was a positive relation between EL-B and LVEF( r =0.352,P <0.05) in slow ejection phase.Conclusions The EL of systolic peroid in hypertensive patients increased,which suggests that the left ventricular hemodynamic changes abnormally,VFM can accurately evaluate the changes of hemodynamic during systole.
