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Circulation:ST段抬高心肌梗死血运重建后 替格瑞洛无保护冠脉微循环的优势

2019-02-22 贾朝娟 环球医学

既往有研究显示,替格瑞洛对心肌梗死患者的微循环具有保护作用。但2019年1月,发表在《Circulation》的一项研究显示,对于ST段抬高心肌梗死患者,血运重建后替格瑞洛维持治疗预防梗死相关区域内冠脉微血管损伤不优于普拉格雷。

既往有研究显示,替格瑞洛对心肌梗死患者的微循环具有保护作用。但2019年1月,发表在《Circulation》的一项研究显示,对于ST段抬高心肌梗死患者,血运重建后替格瑞洛维持治疗预防梗死相关区域内冠脉微血管损伤不优于普拉格雷。

背景:尽管经皮冠脉介入能让心外膜血管成功恢复通畅,但仍有一大部分ST段抬高心肌梗死患者冠脉微血管出现损伤,对临床和功能结局造成不良影响。已有报道称替格瑞洛能增加血浆腺苷水平,对微血管具有保护作用。研究者调查了同普拉格雷维持治疗相比, ST段抬高心肌梗死患者血运重建后替格瑞洛维持治疗是否与冠脉微血管损伤较少相关。

方法:110名ST段抬高心肌梗死患者接受负荷剂量替格瑞洛,并在经皮冠脉介入后随机分配至接受替格瑞洛(n=56)或普拉格雷(n=54)维持治疗。主要结局是1个月时冠脉微血管损伤,用梗死相关动脉微循环阻力指数确定。在急性期和1个月时进行心脏核磁共振成像检查。

结果:替格瑞洛或普拉格雷治疗患者的主要结局微循环阻力指数均没有明显优势(替格瑞洛,21[四分位间距,15~39] U;普拉格雷,18[四分位间距,11~29]U;P=0.08)。随着时间推移,替格瑞洛微循环阻力恢复并不优于普拉格雷(替格瑞洛,-13.9 U;普拉格雷,-13.5 U;P=0.96)。接受替格瑞洛的患者较少出现心内膜内出血(23% vs 43%;P=0.04)。1个月时,梗死面积没有差异(替格瑞洛,7.6[四分位间距,3.7~14.4] g,普拉格雷9.9[四分位间距,5.7~16.6] g;P=0.17)。替格瑞洛(28%)或普拉格雷(41%;P=0.35)组患者的微血管阻塞发生率没有差异。手术期和替格瑞洛或普拉格雷维持治疗期,血浆腺苷浓度均没有差异。

结论:在ST段抬高心肌梗死患者中,替格瑞洛维持治疗预防梗死相关区域内冠脉微血管损伤(以微循环阻力指数评估)不优于普拉格雷,而且1个月时梗塞面积大小也相同。

临床试验注册:URL: https://www.clinicaltrials.gov。唯一识别符:NCT02422888。

原始出处:

van Leeuwen MAH, van der Hoeven NW, Janssens GN, et.al. Evaluation of Microvascular Injury in Revascularized Patients With ST-Segment-Elevation Myocardial Infarction Treated With Ticagrelor Versus Prasugrel. Circulation. 2019 Jan 29;139(5):636-646. doi: 10.1161/CIRCULATIONAHA.118.035931.

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    2019-02-24 gdsun
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    2019-02-24 hyf035

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