Author + information
- Zhang Wen and
- He Huang
To explore the dissipative energy loss (EL) within the left ventricle in hypertension by using vector flow mapping(VFM), to detect left ventricular hemodynamics changes in hypertension patients early and changes of left ventricular function in hypertension by using EL.
21 hypertension patients with abnormal left ventricle mass index (LVMI), 14 hypertension patients with normal LVMI and 22 control subjects are enrolled in this study. Systolic and diastolic EL derived from VFM within the left ventricle and E/e'by dual Doppler was recorded and analyzed.
(1) diastolic and systolic EL were different between control group and hypertension group (P < 0.05), however, no difference between hypertension group with normal LVMI and abnormal LVMI (P > 0.05) . (2) The EL was positively corrected with E/e', but no significant correction between EL and EF in the pooled population. In diastole, EL=0.439SBP-8.349; in systole,EL=0.385SBP+0.644LVMI-10.854.
(1) The increased EL can help us detect changes of LV hemodynamics and function in hypertension patients (2) EL maybe more sensitive than E/e' to evaluate LV diastolic function. Energy loss within the left ventricle is expected to be a new parameter to evaluate function.