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Atherosclerosis:高冠脉钙化的患者应服用他汀药物治疗

2016-10-30 MedSci MedSci原创

背景:伴或不伴冠状动脉钙化(CAC)的符合他汀类药物治疗的患者,服用汀类药物治疗的疗效尚不清楚。本研究旨在评估心血管危险因素如何影响应用他汀类药物做为一级预防,及有无他汀类药物治疗CAC修订的临床预后。方法:研究者对圣弗兰西斯心脏研究临床试验进行Post-hoc分析,这项研究是一项双盲、安慰剂对照的随机对照试验,对CAC≥80%的无症状990例受试者每日分别予阿托伐他汀(20mg)、维生素C(1g

背景:伴或不伴冠状动脉钙化(CAC)的符合他汀类药物治疗的患者,服用汀类药物治疗的疗效尚不清楚。本研究旨在评估心血管危险因素如何影响应用他汀类药物做为一级预防,及有无他汀类药物治疗CAC修订的临床预后。

方法:研究者对圣弗兰西斯心脏研究临床试验进行Post-hoc分析,这项研究是一项双盲、安慰剂对照的随机对照试验,对CAC≥80%的无症状990例受试者每日分别予阿托伐他汀(20mg)、维生素C(1g)、维生素E(1000 U)与安慰剂治疗。主要心血管终点包括非致死性心肌梗死或冠状动脉死亡,冠状动脉血运重建,卒中和外周动脉血运重建。研究者进一步基于2013 ACC/AHA他汀治疗指南及CAC的类别,将其分层为治疗组和安慰剂组。

结果:随访时间的中位数为4.8年,不符合他汀治疗但进行治疗的患者心血管事件率为3.9%,不符合他汀治疗条件未予治疗者为4.6%,符合条件且治疗者为8.9%,符合条件未予治疗者为13.4%(P<0.001)。符合他汀类药物治疗者Low CAC(<100)较少见(≤4%),且与10年事件发生率较低相关(<1每100人年)。相比之下,不符合他汀治疗的患者高CAC(> 300)较频繁(超过35%),且与10年事件发生率较高相关(≥17每100人年)。结合临床风险和CAC分数,风险预测显著(净重新分类指数P = 0.002)。

结论:根据目前他汀类药物治疗指南,一小部分符合他汀类治疗的受试者且低CAC的患者,5年内可能不会受益于他汀治疗。然而,不符合他汀类药物治疗且高CAC的受试者,可能会失去有效初级预防的机会。

原始出处:

Waheed S, Pollack S, et al. Collective impact of conventional cardiovascular risk factors and coronary calcium score on clinical outcomes with or without statin therapy: The St Francis Heart Study. Atherosclerosis. 2016 Sep 17


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    2016-11-01 lsndxfj
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