二维斑点追踪显像评价冠状动脉搭桥术后左室心肌纵向应变  

Evalution of left ventricular function before and after coronary artery bypass grafting by speckle tracking imaging

作　　者：何丹青[1] 王玲[1] 赵晟[1] 赵智伟[2] 

机构地区：[1]安徽医科大学第一附属医院超声科,合肥230022 [2]安徽医科大学第一附属医院心脏外科,合肥230022

出　　处：《中华超声影像学杂志》2013年第2期107-110,共4页Chinese Journal of Ultrasonography

摘　　要：目的探讨二维斑点追踪显像（STI）技术评价冠心病患者冠状动脉搭桥（cABG）术后左室局部及整体纵向收缩功能变化的价值。方法对32例冠心病患者分别于CABG术前、术后3个月行二维超声检查，用二维应变软件分析心尖长轴观、心尖两腔及四腔观的图像，获取左室各节段心肌收缩期纵向峰值应变（SLs）、各切面收缩期峰值整体应变（GSL）及左室整体纵向应变平均值（GSL—Avg）。30例健康志愿者为对照组。结果对照组中基底段至心尖段纵向应变递增，无论是对照组还是冠心病组心尖节段纵向应变均明显高于基底段和中间段。与对照组比较，冠心病组术前心肌缺血节段SLS、GSL减低（P均〈0．05）；冠心病组术后3个月相应节段的SLS、GSI，均较术前显著提高（P均〈0．05）。GSL-Avg与左室射血分数呈良好的一致性（r=0．85）。结论STI技术可定量、客观地评价左室局部及整体收缩功能变化，为cABG疗效评定和冠心病预后判定提供了一种无创手段。Objective To evaluate regional and global left ventricular systolic function after coronary artery bypass grafting （CABG） by speckle tracking imaging （STI）. Methods Transthoracic echocardiography （TTE） was performed in 32 patients with coronary heart disease （CHI）） preoperative and 3 months after CABG. The two-dimensional data were obtained in apical 4-chamble,2-chamble and long axis view. Peak systolic longitudinal strain （SLs）,global longitudinal systolic strain （GLS） and average global strain（GLS-Avg） were measured using STI. 30 healthy volunteers were involved as controls. Results SLs in the control group increased from the basal to the apical ventricular. SLs in the control group and CHD group apical segment were significantly higher than the basal and middle segments. Compared to the control group,SLs,GI.S in part of myocardial ischemic segments were lower in CHD group before CABG （ P 0.05）. SLs and GSL in the corresponding segments showed significantly improving 3 months after CABG in CHD group （P ~ 0.05）. There was good relationship between GSL-Avg and left ventricular ejection fraction. Conclusions STI technology can be used to objectively and quantitatively evaluate the change of regional and global left ventricular systolic function. There{ore, it provide a non-invasive means for evaluation of curative effect and prognosis judgement of CHD after CABG.

关 键 词：超声心动描记术 冠状动脉分流术 心室功能 左 应变 斑点追踪显像 

分 类 号：R445.1[医药卫生—影像医学与核医学]