【摘要】 目的:探讨超声斑点追踪成像技术定量评价冠状动脉搭桥术前、后心肌功能的临床价值。方法:选择2012年1月~2013年1月在我院心脏外科行体外循环下冠状动脉旁路移植术的患者,对冠状动脉搭桥术术前1周、术后1月、3月、6月进行常规超声心动图检查,然后应用斑点追踪技术进行分析。结果:所有患者的纵向应变值仅在术后3个月和6个月显著增加,与术前、术后1个月比较差别有统计学意义(P<0.01)。圆周应变值在术后1个月、3个月和6个月均显著增高,与术前比较差别有统计学意义(P<0.05)。老年组术后6个月的纵向应变值和圆周应变值与术后3个月比较差别有统计学意义(P<0.05)。手术前、后常规超声心动图检查结果比较差别无统计学意义(P>0.05)。结论:超声斑点追踪技术用于评估CABG术后缺血心肌的功能变化的敏感性高于常规超声心动图检查,为临床评价CABG的疗效提供了一种新方法。更多还原

【Abstract】 Objective: To investigate the clinical significance of speckle tracking imaging in the quantitative evaluation of myocardial function of patients after coronary artery bypass graft surgery(CABG). Methods: In this study, patients who underwent CABG in the department of cardiac surgery from January 2012 to January 2013 were selected, all the patients(left ventricular ejection fraction ≥ 50%)were classified into two groups based on the age: elderly group(>60 years old) and non-elderly group(≤60 years). The conventional echocardiography, longitudinal strain and circumferential strain were measured by STI analysis 1 week before CABG and 1, 3, 6 months after CABG. Results: The longitudinal strain increased significantly at 3 and 6 months after CABG compared with that pre-operation(P<0.05). The circumferential strain of both groups increased significantly at 1, 3 and 6 months after CABG, compared with that baseline(P<0.05). But in the elderly group, the longitudinal strain and circumferential strain increased significantly at postoperative 6 month compared with that postoperative 3 month(P<0.05). However, no significant difference was found in the left ventricular end-diastolic dimension(LVEDd), left ventricular ejection fraction(LVEF) and stroke volume(SV) measured by routine echocardiography between preand post-CABG(P>0.05). Conclusion: Speckle tracking technology was more sensitive to evaluate the myocardial function after CABG than conventional echocardiography, and provided a new method for the evaluation of CABG efficacy in clinic.更多还原