Evaluation of exercise on left ventricular function in patients with slow coronary flow by excercise‐stress echocardiography
10.3760/cma.j.issn.1004‐4477.2019.05.004
- VernacularTitle:超声心动图评价运动负荷对冠状动脉慢血流患者左心室功能的影响
- Author:
Guangyuan LI
1
;
Qiuyu CAI
;
Chunyan MA
;
Fanxin KONG
;
Yonghuai WANG
;
Pingping MENG
;
Jun YANG
Author Information
1. 中国医科大学附属第一医院心血管超声科
- Keywords:
Echocardiography,stress;
Slow coronary flow;
Ventricular function,left
- From:
Chinese Journal of Ultrasonography
2019;28(5):387-391
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the role of treadmill exercise‐stress echocardiography in the assessment of left ventricular ( LV ) function in patients with slow coronary flow ( SCF ) ,and discuss the possible mechanism of SCF . Methods Forty‐six patients with diagnosis of SCF were enrolled as SCF group . Forty age and sex matched adults were included as control group . All subjects had underwent clinical evaluation and exercise stress echocardiography . LV diastolic and systolic functions were assessed by conventional echocardiography , tissue Doppler imaging and two‐dimensional speckle tracking echocardiography at rest and during exercise . Results ①LV function in patients with SCF at rest :LV peak systolic longitudinal strain ( LS) was lower in patients with SCF than that in controls ( P ＜0 .05) . T here was no difference of LV ejection fraction ( LVEF) between the two group( P＞0 .05) . Early diastolic mitral annulus velocity ( M itral e′) and the ratio between the early mitral inflow velocity and Mitral e′( M itral E/e′) were significantly decreased in SCF group( all P＜0 .01 ) . ②LV function during exercise :LVEF ,LS and M itral e′were significant increased in two groups ( all P ＜0 .05 ) than those at rest ,but there was no significant difference of LVEF ,LS ,M itral e′ and M itral E/e′ between the two groups ( all P ＞ 0 .05 ) . Compared with control group ,ΔLS and ΔM itral e′were significantly higher in SCF group ( all P＜0 .05 ) . Conclusions LV systolic and diastolic function in patients with SCF are impaired at rest . LV systolic and diastolic function recover in patients with SCF during exercise .
