急性心肌梗死患者中紫杉醇洗脱支架与裸金属支架梁覆盖和晚期移位的比较

2011-05-05 MedSci原创 MedSci原创

  背景 药物洗脱支架(DES)治疗ST段抬高性心肌梗死(STEMI)的安全性仍存在争议。病理研究表明,支架梁无内皮覆盖与随后支架内血栓发生相关。光学相干断层成像(OCT)能够在微观水平观察到体内支架梁的覆盖情况。因此,我们使用OCT方法,在接受紫杉醇洗脱支架(PES)和裸金属支架(BMS)置入的STEMI患者中检测了支架梁的覆盖情况。   方法与结果 在HORIZONS-AMI(直接血管成形术

  背景 药物洗脱支架(DES)治疗ST段抬高性心肌梗死(STEMI)的安全性仍存在争议。病理研究表明,支架梁无内皮覆盖与随后支架内血栓发生相关。光学相干断层成像(OCT)能够在微观水平观察到体内支架梁的覆盖情况。因此,我们使用OCT方法,在接受紫杉醇洗脱支架(PES)和裸金属支架(BMS)置入的STEMI患者中检测了支架梁的覆盖情况。

  方法与结果 在HORIZONS-AMI(直接血管成形术对急性心肌梗死的疗效)试验中,STEMI患者以3:1的比例随机接受PES或BMS支架置入。在正式亚组研究中,我们在术后13个月对118例连续随机入选的患者(89 例接受PES置入,29例接受BMS置入)进行了OCT检查,评估了188个支架(146个PES和42个BMS)。共44139个支架梁在对支架类型不知情的独立中心实验室接受分析。主要预设终点为随访期间每组未覆盖的支架梁比例,BMS组与PES组为(1.1%±2.5%)对(5.7%±7.0%)(P<0.0001)。BMS组与PES组的支架移位发生率为(0.1%±0.2%)对(0.9%±2.1%)(P=0.0003)。BMS组与 PES组的净容积阻塞率为(36.0%±15.4%)对(19.2%±11.3%)(P<0.0001)。

  结论 根据本研究在术后13个月随访时进行的OCT检查结果,对于接受直接经皮冠状动脉介入术(PCI)的STEMI患者,与BMS相比,接受PES置入可显著降低血管内膜增生,但也会导致支架梁未覆盖和移位比例较高。尚需进一步研究明确这些结果的临床意义。[Circulation 2011, 123(3): 274]

  (作者:意大利贝尔加莫地区Ospedali Riuniti医院心血管系心脏科Giulio Guagliumi (朱利奥·瓜柳米); 翻译:陈淼)

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