Circulation:非缺血性收缩期心衰患者初级预防植入心律转复除颤器的年龄和结局

2017-09-08 xiangting MedSci原创

在不是由缺血性心脏病引起的收缩期心衰患者中,ICD与生存率之间的关系随着年龄的增长呈线性降低。

丹麦关于评估非缺血性收缩期心衰患者植入式心律转复除颤器(ICD)对死亡率(DANISH)影响的研究并没有显示ICD植入对全因死亡率的总体影响。然而,预先指定的亚组分析表明,ICD与死亡率之间可能存在年龄依赖关系,仅在最年轻的患者中观察到生存获益。非缺血性收缩期心衰患者初级预防ICD植入年龄与结局之间的关系性质值得进一步研究。

来自DANISH研究的1116例患者均被纳入该预先指定的亚组分析。根据年龄评估了ICD与死亡率之间的关系,使用选择影响曲线估计了非参数的最佳年龄阈值。死亡方式分为心源性猝死(SCD)和非猝死,并分别使用Chi2分析比较了年龄小于或大于阈值的患者。

研究人群的中位年龄为63岁(21-84岁)。ICD与死亡率的关系随年龄呈线性降低,HR 1.03(95%CI 1.003 - 1.06),p = 0.03。ICD植入的最佳年龄阈值在≤70岁。在≤70岁的患者中,全因死亡率降低与ICD之间存在关联,HR为0.70(0.51-0.96),p = 0.03,而不是在70岁以上患者中,HR为1.05(0.68-1.62),p = 0.84 。对于≤70岁的患者,SCD率为1.8(1.3-2.5),非猝死率为2.7(2.1-3.5)次/ 100患者年,而70岁以上患者SCD率为1.6(0.8-3.2),非猝死率为5.4(3.7-7.8)次/ 100患者年。两年龄组间死亡方式的差异有统计学意义(P = 0.01)。

在不是由缺血性心脏病引起的收缩期心衰患者中,ICD与生存率之间的关系随着年龄的增长呈线性降低。在这个研究人群中ICD植入年龄阈值在70岁以下,整体人口的生存率最高。

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    2017-09-10 zhouqu_8
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    2017-09-10 jiyangfei

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