RESUMO
Objective:To explore value of vector flow mapping (VFM) technique in quantitative determination of left ventricular flow energy loss (LVFEL) in different phases and segments in hypertensive patients.Methods:A total of 130 hypertensive patients treated in our hospital from Jan 2014 to Jan 2017 were enrolled as hypertension group.Another 130 healthy subjects undergoing physical examination simultaneously were enrolled as healthy control group.According to clinical pattern,hypertension group was further divided into normal structure group (NS group,n＝40),concentric remodeling group (CR group,n＝ 56) and concentric hypertrophy group (CH group,n＝34).LVFEL of different phases and segments were measured and compared by VFM technique among all groups.Re-sults:LVFELs of different phases and segments in hypertension group were significantly higher than those of health-y control group,P＝0.001 all.Compared with NS group,there were significant rise in [ (15.10 ± 1.22) N·m-1· s-1vs.(17.94 ± 1.28) N·m-1·s-1vs.(16.76 ± 1.24) N·m-1·s-1] in CR group and CH group,and that of CR group was significantly higher than that of CH group,P＝0.001 all;compared with NS group and CH group,there was significant rise in middle segment flow EL [ (8.10 ± 1.20) N· m-1·s-1,(8.22 ± 1.18) N· m-1· s-1vs.(8.94 ± 1.16) N· m-1·s-1] in CR group,P＜ 0.01 all;apical segment flow EL of CH group was significantly higher than that of NS group [ (4.59 ± 1.07) N·m-1·s-1vs.(3.91 ± 1.09) N·m-1·s-1],P＝0.006;mid-di-astolic flow EL of CR group was significantly higher than that of NS group [ (8.87 ± 1.03) N·m-1·s-1vs.(8.25 ± 1.05) N·m-1·s-1],P＝0.006.Conclusion:Vector flow mapping technique can accurately and quantitatively determine LVFEL in different phases and segments in hypertensive patients,which provides reliable evidence for early revealing hemodynamic changes.