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Circulation:hs-cTnl及其危险分层阈值在疑似急性冠脉综合征患者中的应用

2019-11-05 QQY MedSci原创

指南承认高敏感性心肌肌钙蛋白(hs-cTnl)在心肌梗死风险分层和早期排除方面的新作用,但阈值尚未统一。现研究人员对怀疑急性冠脉综合征患者的风险分层阈值的安全性和有效性进行评估。本研究从苏格兰的10家医院招募了48282位疑诊急性冠脉综合征患者。在预定的次级和观察性分析中,研究人员采用Abbott高敏感性肌钙蛋白I法对比检测上限(<2 ng/L)和优化风险分层阈值(<5 ng/L)的性

指南承认高敏感性心肌肌钙蛋白(hs-cTnl)在心肌梗死风险分层和早期排除方面的新作用,但阈值尚未统一。现研究人员对怀疑急性冠脉综合征患者的风险分层阈值的安全性和有效性进行评估。

本研究从苏格兰的10家医院招募了48282位疑诊急性冠脉综合征患者。在预定的次级和观察性分析中,研究人员采用Abbott高敏感性肌钙蛋白I法对比检测上限(<2 ng/L)和优化风险分层阈值(<5 ng/L)的性能。排除有心肌损伤、症状≤2h或ST段抬高型心肌梗死患者。明确所有患者和亚组在30天内心肌梗死或心源性死亡的主要结点的阴性预测值。次要结点是12个月内心肌梗死或心源性死亡。

总体上,共纳入32 837位患者(61±1.7岁,47%女性),其中23 260位(71%)和12 716位(39%)患者的hs-cTnI浓度分别是<5 ng/L和<2 ng/L。hs-cTnI浓度分<5 ng/L和<2 ng/L的患者的主要结点的阴性预测值分别是99.8%和99.9%。在这两种阈值下,男性和女性以及所有年龄组的阴性预测值是一致的,虽然被确定为低风险的患者比例随着年龄的增长而下降。与hs-cTnI浓度≥5 ng/L但<第99百分位的患者相比,<5 ng/L和<2 ng/L的患者12个月时的心肌梗死或心源性死亡的风险分别降低了77%和80%。

采用hs-cTnl的风险分层阈值鉴别疑诊急性冠脉综合征患者,无论年龄和性别,出现症状至少2小时为低风险。

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    2019-11-07 qjddjq
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    2019-11-06 thm112988

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