Myocardial work technology in evaluation of left ventricular systolic function in patients with acute myocardial infarction / 中国医学影像技术

ABSTRACT

Objective:To explore the value of myocardial work (MW) technology in evaluation of left ventricular systolic function in patients with acute myocardial infarction (AMI). Methods: Routine echocardiographic parameters and MW parameters of 30 AMI patients (AMI group) and 30 healthy volunteers (control group) were collected and compared. The correlations of global constructive work (GCW), left ventricular ejection fraction (LVEF) and global longitudinal strain (GLS) were assessed. Results: Compared with control group, left ventricular end-diastolic diameter (LVEDD), left ventricular end-systolic diameter (LVESD), interventricular septum thickness at end-diastolic (IVSD), left ventricular end-diastolic volume (LVEDV), left ventricular end-systolic volume (LVESV), peak velocity of mitral valve early diastolic (E)/tissue Doppler velocity of mitral posterior annulus (e), left ventricular mass (LVM), left ventricular mass index (LVMI) and mitral regurgitation (MR) increased, while left ventricular ejection fraction (LVEF), E and e decreased in AMI group (all P<0.05). Compared with control group, GCW, global work efficiency (GWE) and global work index (GWI) decreased, while global wasted work (GWW), global longitudinal strain (GLS) and peak strain dispersion (PSD) increased in AMI group (all P<0.05). GCW showed positive correlation with LVEF (r=0.573, P=0.001) and negative correlation with GLS (r=-0.880, P<0.001) in AMI patients. Conclusion: MW technology could be used to evaluate changes of left ventricular systolic function in patients with AMI.