Clinical Research
Evaluation of exercise on left ventricular function in patients with slow coronary flow by excercise-stress echocardiography
Guangyuan Li, Qiuyu Cai, Chunyan Ma, Fanxin Kong, Yonghuai Wang, Pingping Meng, Jun Yang
Published 2019-05-25
Cite as Chin J Ultrasonogr, 2019, 28(5): 387-391. DOI: 10.3760/cma.j.issn.1004-4477.2019.05.004
Abstract
ObjectiveTo 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.
MethodsForty-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.
Results①LV 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). There was no difference of LV ejection fraction (LVEF) between the two group(P>0.05). Early diastolic mitral annulus velocity (Mitral e′) and the ratio between the early mitral inflow velocity and Mitral e′(Mitral E/e′) were significantly decreased in SCF group(all P<0.01). ②LV function during exercise: LVEF, LS and Mitral e′ were significant increased in two groups (all P<0.05) than those at rest, but there was no significant difference of LVEF, LS, Mitral e′ and Mitral E/e′ between the two groups (all P>0.05). Compared with control group, ΔLS and ΔMitral e′ were significantly higher in SCF group (all P<0.05).
ConclusionsLV systolic and diastolic function in patients with SCF are impaired at rest. LV systolic and diastolic function recover in patients with SCF during exercise.
Key words:
Echocardiography, stress; Slow coronary flow; Ventricular function, left
Contributor Information
Guangyuan Li
Department of Cardiovascular Ultrasound, the First Affiliated Hospital of China Medical University, Shenyang 110001, China
Qiuyu Cai
Chunyan Ma
Fanxin Kong
Yonghuai Wang
Pingping Meng
Jun Yang