Strain rate imaging assessment of left atrial early function in pilots with essential hypertension
10.3877/cma.j.issn.1672-6448.2014.05.010
- VernacularTitle:应变率成像技术评价原发性高血压飞行员左心房功能的早期改变
- Author:
Xue, LI
;
Huijun, YU
;
Rongjian, ZHANG
;
Di, FANG
;
Li, ZHAO
;
Xiangwu, FEI
;
Chunlei, CHEN
;
Xiaohui, BU
- Publication Type:Journal Article
- Keywords:
Echocardiography;
Coronary artery disease;
Ventricular function,left;
Strain rate imaging
- From:
Chinese Journal of Medical Ultrasound (Electronic Edition)
2014;(5):403-408
- CountryChina
- Language:Chinese
-
Abstract:
Objective To assess the left atrial early function in pilots with essential hypertension by strian rate imaging (SRI). Methods Twenty-five hypertensive pilots without left ventricular hypertrophy and expansion (LVN) were selected. Twenty-ifve healthy pilots were included as control group. At the left ventricular apical four-chamber view, three-chamber view, two-chamber view, the systolic, early and late diastolic peak strain rate (SRs, SRe, SRa) curves were acquired by SRI in the basal section, the middle section and the upper section of the wall of left atrium. The average strain rate (mSRs, mSRe, mSRa) was calculated. The LA maximal, minimal and pre-systolic volume (LAVmax , LAVmin and LAVp), LA passive ejection fraction (LAPEF), LA active ejection fraction (LAAEF) , left atrial stroke volume (LASV), E/A and E/E′ were calculated. Results The LAPEF, LAAEF, LASV, E/A, E/E′were (38.96±6.43)%, (61.11±5.86)%, (14.74±5.33)mm, 1.23±0.08, 8.63±1.77 in the control group, and were (34.18±5.72)%, (63.23±6.89)%, (10.12±3.23)mm, 1.04±0.26, 7.16±0.84 in the study group. Compared with the control group, signiifcant difference was detect in LAPEF, LAAEF, LASV, E/E′(t=4.840, 2.690, 4.801, 2.950, all P<0.05). No signiifcant difference was found in E/A between the study and control group (t=-1.424, P=0.178). There was signiifcant positive correlation between SRa and E/E′(r=0.632, P<0.05). Conclusion SRI could be applied in the evaluation of early left atrial function. In pilots with essential hypertension, the changes of strain rate in left atrial wall, which is prior to the modeling geometry of left ventricular, could be detected by SRI.
