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Circulation:个性化心率反应程序可改善植入心脏起搏器的心衰患者的运动耐受能力

2020-06-09 QQY MedSci原创

射血分数降低的心脏衰竭(HFrEF)的特征是,心率与左心室(LV)收缩力之间的正相关关系(称为力频关系[FFR])减弱。Gierula等人既往发现,在单个无创FFR数据的基础上调整HFrEF患者心脏植

射血分数降低的心脏衰竭(HFrEF)的特征是,心率与左心室(LV)收缩力之间的正相关关系(称为力频关系[FFR])减弱。Gierula等人既往发现,在单个无创FFR数据的基础上调整HFrEF患者心脏植入式电子设备的速率响应程序可以显著提高患者的运动能力。本次研究旨在明确使用FFR数据来定制带有心脏植入式电子设备的HFrEF患者的心率反应是否可对6个月后的运动能力和LV功能产生有利影响。

Gierula等人对患有稳定症状的HFrEF患者进行了单中心、双盲、随机、平行组试验,采用最佳的指导性药物治疗和心脏植入式电子设备(心脏再同步治疗或植入式心脏复律除颤器)。1:1分组,主要预后指标是跑步机步行测试中步行时间的变化。次要指标包括LV收缩功能、峰值耗氧量和生活质量的变化。

共招募到83位患者,平均74.6岁,LV射血分数平均为35.2。6个月时,FFR指导的速率自适应起搏运动时间的平均变化为75.4秒,对照组(常规设置)的仅平均变化了3.1秒;虽然FFR组的心率峰值低于对照组(98.6±19.4 vs 112.0±20.3 次/分)。FFR指导的心率设置对左心室结构或功能无不利影响,而常规设置与左心室射血分数降低有关。

在本II期研究中,用可再现的非侵入性方法确定的FFR指导的速率反应程序似乎可改善运动时间,并可限制HFrEF和心脏植入式电子设备患者的LV功能变化。

原始出处:

John Gierula,et al. Personalized Rate-Response Programming Improves Exercise Tolerance After 6 Months in People With Cardiac Implantable Electronic Devices and Heart Failure. Circulation. 2020;141:1693–1703

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    2020-06-11 HNYYM
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    2020-06-11 jiyangfei

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