Eur Heart J:羧基麦芽糖铁对心脏再同步治疗后的心脏逆重构的作用

2021-07-13 MedSci原创 MedSci原创

对于缺铁且CRT后LVEF持续降低的HFrEF患者,采用 FCM治疗可改善通过LVEF、LVESV和肌力-频率关系评估的心功能

射血分数降低的心力衰竭(HFrEF)患者常存在铁缺乏;铁缺乏负性影响心脏结构和心功能。本研究旨在评估羧基麦芽糖铁 (FCM) 对 HFrEF患者的心脏逆重构和收缩状态的影响。

这是一项双盲的临床试验,招募了伴铁缺乏的有症状的HFrEF患者(心脏再同步治疗[CRT]后至少6个月内左心室射血分数持续降低[LVEF<45%]),随机分至FCM组或标准护理(SOC)组。主要终点是从基线到随访3个月的LVEF变化(根据3D超声心动图评估)。次要终点包括从基线到随访3个月的左心室收缩末期 (LVESV) 和舒张末期容积 (LVEDV) 变化。

主要终点

共招募了75位患者随机分至FCM组(n=37)和SOC组(n=38)。基线时,两个治疗组的匹配良好,包括基线LVEF(34±7 vs 33±8,p=0.411)。3个月后,FMC组的LVEF变化(+4.22%, 95%CI +3.05%; +5.38%)明显较SOC组的(0.23%, 95%CI -1.44%; +0.97%; p<0.001)更高。与此类似的,FCM组的LVESV也较SOC组得到了明显的改善(-9.72 mL, 95%CI -13.5 mL; -5.93 mL vs -1.83 mL, 95%CI -5.7 mL; -2.1 mL; p=0.001),但LVEDV无此差异(p=0.748)。

次要终点

基线时,两个治疗组都表现出负性肌力-频率关系。FCM干预使双心室起搏期间CCI斜率改善,在3个月时获得了正性肌力-频率关系。

总结示意图

总而言之,对于缺铁且CRT后LVEF持续降低的HFrEF患者,采用 FCM治疗可改善通过LVEF、LVESV和肌力-频率关系评估的心功能。

原始出处:

Martens Pieter,Dupont Matthias,Dauw Jeroen et al. The effect of intravenous ferric carboxymaltose on cardiac reverse remodelling following cardiac resynchronization therapy-the IRON-CRT trial.[J] .Eur Heart J, 2021, https://doi.org/10.1093/eurheartj/ehab411

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