目的:评价斑点追踪超声心动图(STE)判断急性ST段抬高型心肌梗死(STEMI)并接受择期经皮冠状动脉介入治疗(PCI)患者是否发生左心室重构的价值.方法:共入选127例首次STEMI并接受择期PCI的患者,入院后48 h内行超声心动图检查.出院后随访6~9个月(中位数为7.8个月),复查超声心动图,左心室重构的定义为左心室收缩末期容积较初次测量增加>15%.根据127例患者是否发生左心室重构分为两组,41例发生左心室重构患者为左心室重构组,另86例患者为无左心室重构组.结果:左心室重构组和无左心室重构组两组间比较,左心室壁总体纵向应变、纵向应变达峰时间标准差(Ts-SD)、径向应变、纵向左心室收缩后收缩指数等均有显著差异.进一步Logistic回归分析表明,总体纵向应变[比值比(OR)=0.39,95%可信区间(CI):0.26~0.57,P<0.01]及径向应变(OR=1.07,95%CI:1.02~1.13,P=0.01)是预测STEMI并接受择期PCI的患者发生左心室重构的独立预测因素,受试者工作特征(ROC)曲线分析显示二者的最佳界值分别为-10.85%(敏感性:89.7%,特异性:91.7%)及28.46%(敏感性:82.1%,特异性:66.7%).结论:应用STE获得的左心室壁总体纵向应变及径向应变等是预测STEMI并行择期PCI后发生左心室重构的独立相关因素.%Objective: To study the value of speckle tracking echocardiography (STE) for assessing left ventricular remodeling (LVR) in patients of acute ST-elevation myocardial infarction (STEMI) with late percutaneous coronary intervention (PCI). Methods: A total of 127 STEMI patients with elective PCI were enrolled. Echocardiography was conducted within 48 hours of admission and the patients were followed-up for 6-9 (median 7.8) months after discharge. LVR was deifned by left ventricular end-systolic volume (LVESV) elevation >15% than the ifrst echocardiography. The patients were divided into 2 groups: LVR group,n=41 and Non-LVR group,n=84. Results: There were significant differences between 2 groups in left ventricular global longitudinal strain (GLS), longitudinal Ts-SD, radial strain (RS) and longitudinal postsystolic index. Further Logistic regression analysis indicated that GLS (OR=0.39, 95% CI 0.26-0.57,P<0.01) and RS (OR=1.07, 95% CI 1.02-1.13,P=0.01) were the independent predictors for LVR occurrence; ROC presented that the optimal cut-off value for GLS was -10.85% (sensitivity 89.7%, specificity 91.7%) and for RS was 28.46% (sensitivity 82.1%, speciifcity 66.7%). Conclusion: STE measured GLS and RS were the independent predictors for LVR occurrence in STEMI patients with late PCI.
展开▼
