心肌做功技术评估急性心肌梗死患者左心室收缩功能

目的探讨心肌做功(MW)技术评估急性心肌梗死(AMI)患者左心室收缩功能的应用价值。方法对比30例AMI患者(AMI组)与30名健康志愿者(对照组)的常规超声心动图参数及MW参数,分析AMI患者左心室整体有用功(GCW)与左心室射血分数(LVEF)、整体长轴应变(GLS)之间的相关性。结果与对照组比较,AMI组左心室舒张末期内径(LVEDD)、左心室收缩末期内径(LVESD)、室间隔舒张末期厚度(IVSD)、左心室舒张末期容积(LVEDV)、左心室收缩末期容积(LVESV)、二尖瓣口舒张早期峰值流速(E)/二尖瓣后叶瓣环组织多普勒速度(e)、左心室质量(LVM)、左心室质量指数(LVMI)及二尖瓣反流面积(MR)均增大,LVEF、E及e值均减低(P均<0.05);左心室GCW、整体做功效率(GWE)、整体做功指数(GWI)均降低,整体无用功(GWW)、GLS、峰值应变离散度(PSD)均增高(P均<0.05)。AMI患者GCW与LVEF呈正相关(r=0.573,P=0.001),GCW与GLS呈负相关(r=-0.880,P<0.001)。结论 MW技术可用于评估AMI患...

Myocardial work technology in evaluation of left ventricular systolic function in patients with acute myocardial infarction

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.