摘要
目的探讨二维斑点追踪(STI)技术评价冠心病(CHD)患者冠状动脉搭桥(CABG)术后左室收缩功能变化。方法选择30例正常成人(对照组)和32例接受CABG术的CHD患者(CHD组)为研究对象。经胸采集心尖两腔观、心尖四腔观和心尖长轴观的连续3个心动周期的二维灰阶动态图像。应用GE Echo PAC软件分析图像,测量左室各节段心肌的收缩期纵向峰值应变(SLs)、收缩期纵向峰值应变率(SrLs)。结果对照组中基底段至心尖段纵向应变递增。与对照组比较,CHD组术前心肌缺血节段SLs、SrLs降低(P<0.05);CHD组术后3个月相应节段的SLs、SrLs均较术前显著提高(P<0.05)。结论 CABG能有效改善患者左心室收缩功能。STI技术可定量、客观地评价CABG术前术后左心收缩功能变化,为临床评定CABG疗效和判断预后提供了一种有效手段。
Objective To investigate the applied value of regional and global left ventricular Systolic function after coronary artery bypass grafting（CABG） by speckle tracking imaging（STI）.Methods Thirty healthy adults and thirty-two patients with CHD who underwent CABG were enrolled in this study.Three consecutive cardiac cycles images from enough frame rates STI were obtained from 4-chamber view,2-chamber view and apex long-axis view.Analyzing these images using a software GE Echo PAC PC SW-Only,measuring the systolic longitudinal strain（SLs）,systolic longitudinal strain rated（SrLs）.Then the results were analyzed and compared.Results Longitudinal strain in the control group increased from the basal to the apical ventricule.Compared to the control group,SLs and SrLs in part of myocardial ischemic segments were lower in CHD before CABG（P0.05）.SLs,SrLs in the corresponding segments of patients 3 months postoperative showed significant improvement than those compared to preoperative（P0.05）.Conclusion The results of this study suggest that the left ventricular systolic and diastolic function in CHD patients were improved after CABG;STI can assess the change of left ventricular function after CABG much accurately,and provide an effective and noninvasive method for clinical evaluation of left ventricular function.
出处
《安徽医科大学学报》
CAS
北大核心
2013年第1期65-68,共4页
Acta Universitatis Medicinalis Anhui
关键词
冠状动脉搭桥术
超声心动描记术
左心室功能
coronary artery bypass grafting
echocardiography
left ventricular function
