斑点追踪成像评价急性心梗患者冠脉支架置入术后左室短轴径向收缩功能

Evaluation of Left Ventricular Radial Systolic Performance in Patients with Acute Myocardial Infarction after Coronary Artery Stent Implantation by Speckle Tracking Imaging

目的应用斑点追踪成像技术(STI)评价急性心梗患者支架置入术(PCI)左室短轴径向收缩功能变化情况,了解PCI术对急性心梗患者再灌注治疗的短期疗效。方法应用STI对28例急性心梗患者分别于PCI术前(1～3)d、术后(29±3)d、术后(90±6)d测定左室径向运动指标收缩期峰值径向应变(SR)、应变率(SRs)、径向位移(DR)。结果 PCI术后1个月左室壁部分梗死节段SR、SRs、DR较术前有所改善(P<0.05),术后3个月各梗死节段较术前均有明显改善(P<0.01);术后3个月左室壁梗死节段SR、SRs、DR总峰值在二尖瓣水平、乳头肌水平及心尖水平均高于术前及术后1个月相应数值(均P<0.01)。结论 STI能够定量评价急性心梗患者PC I术后的节段性室壁运动变化情况,为临床评价PCI术后患者的左心功能变化提供了一个有效、无创的方法。

Objective To observe the left ventricular radial systolic performance in Acute Myocardial Infarction（AMI） after percutaneous coronary intervention（PCI） using speckle tracking imaging（STI）,and to evaluate the short-term effect of Acute Myocardial Infarction myocardium perfusion after PCI.Methods The indicators of left ventricular radial motion indicators-peak systolic radial strain（SR）,strain rate（SRs） and the radial displacement（DR） were measured by STI in 28 cases with AMI before PCI,respectively（1 ~ 3） d,postoperative（29±3） d,postoperative（90±6） d.Results One month after PCI,left ventricular wall part of the infarct segments SR,SRs,DR before surgery improved significantly（P0.05）.Three months after PCI,the infarction segments were significantly improved compared with the pre-operation（P0.01）.The general SR、SRs、DR in papillary muscle level、in mitral annulus and apex level at the 3rd month after PCI were significantly higher than those in pre-operation group and at the 1st month after PCI（P0.01）.Conclusion STI can quantitatively evaluate the change of left ventricular segmental wall motion in patients with AMI after PCI.It provides an effective and noninvasive method for clinical evaluation of left ventricular function.