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目的:探讨超声背向散射技术(IBS)对急性心肌梗死(AMI)行急诊经皮冠状动脉介入治疗术(PCI)后的患者识别存活心肌的临床应用价值。方法:应用IBS对13例首次AMI并行急诊PCI的患者在入院后第1、3、10天进行参数采集,并脱机进行分析,以3个月后室壁节段运动恢复者作为判断心肌存活的最终标准。结果:IBS在第3天时就可以较敏感地检测到存活心肌,较室壁运动的恢复提前。第3天和第10天检测存活心肌的敏感性、特异性、阳性预测值、阴性预测值分别为63.0%、73.7%、72.3%、58.3%;78.9%、78.9%、82.7%、65.2%。结论:IBS可以较早地检测AMI行急诊PCI的患者的存活心肌,并对功能恢复有较高的预测价值。
Objective: To investigate the clinical value of ultrasonic backscatter (IBS) in the identification of viable myocardium in patients undergoing acute percutaneous coronary intervention (PCI) with acute myocardial infarction (AMI). Methods: Thirteen patients with first AMI concurrent emergency PCI were enrolled in this study. The parameters were collected on the 1st, 3rd, 10th days after admission and were analyzed offline. The survivals of myocardium were determined after 3 months The final standard. Results: IBS detected viable myocardium more sensitively on day 3, and earlier recovery than wall motion. The sensitivity, specificity, positive predictive value and negative predictive value were 63.0%, 73.7%, 72.3%, 58.3%, 78.9%, 78.9%, 82.7%, 65.2% on the 3rd and 10th days, respectively. Conclusions: IBS can detect the myocardial viability of AMI patients who have undergone PCI earlier and have higher predictive value for functional recovery.