JACC:静息心率增加与心衰风险升高相关

2014-01-14 高晓方 译 医学论坛网

美国一项研究表明,在无症状受试者中,静息心率增加与心衰风险升高具有相关性。心率增加与亚临床动脉粥样硬化和冠心病的局部和整体左室功能进展具有相关性。论文于2014年1月在线发表于《美国心脏病学会杂志》(J Am Coll Cardiol)。 此项研究共纳入5000例接受心脏MRI检查的受试者,并在中位随访7年期间共确认176例心衰。在基线和5年后接受影像检查的1056例受试者中,测定作为整

早在20多年前,Framingham研究就发现静息心率与心血管事件和死亡相关。然而多年过去,尽管后续有多项研究均显示心率加快与高血压、冠心病、急性心肌梗死及慢性心力衰竭等疾病的发病率和死亡率相关,但静息心率仍未被纳入主要心血管危险因素队伍中,其中部分原因可能是受到其他危险因素的相互影响,另一原因可能是静息心率与心血管事件关系的机制仍未明确。

已有研究发现,静息心率介导的动脉压与交感神经过度兴奋、动脉粥样硬化、斑块不稳定性有关,使其在心血管疾病进展和临床表现的潜在机制备受瞩目。众所周知,静息心率的加快不仅与心血管疾病的死亡率增加有关,同时也与非心血管疾病的死亡率相关。在既往许多研究的流行病学研究和冠心病患者中,静息心率与左心功能不全和/或心力衰竭有关。

很少有临床研究探讨在无心血管疾病史的无症状患者中,静息心率是否与左心功能不全和/或心力衰竭有关。静息心率和每搏输出量密切调节,以提供足够的心脏输出量。在左心功能不全及进展为心力衰竭的早期,左心功能的轻微下降或许伴随着静息心率的代偿行加快,甚至在加快的静息心率作为神经内分泌过度激活之前。

就此方面,尚未有研究评估在大规模无症状人群中静息心率与心力衰竭和心功能不全的关系。

基于上述背景,来自约翰霍普金斯大学医学院的Anders Opdahl等对MESA研究(动脉粥样硬化多民族研究)6814名参与者进行了分析,以评估基线静息心率与心力衰竭和全心或左心功能不全的关系,论文于2014年1月在线发表于《美国心脏病学会杂志》(J Am Coll Cardiol)。

此项研究共纳入5000例接受心脏MRI检查的受试者,并在中位随访7年期间共确认176例心衰。在基线和5年后接受影像检查的1056例受试者中,测定作为整体和局部左室功能障碍形成标志物的射血分数变化(ΔEF)和圆周峰值应变变化(Δεcc)。对至心衰事件以及ΔEF和Δεcc进行人口统计学、传统心血管危险因素和钙化评分等校正。

结果显示,在Cox分析中,静息心率每升高1次/分钟时,心衰校正相对风险升高4%(危险比1.04;P<0.001)。校正多重回归模型显示,静息心率与εcc恶化和EF降低具有正相关性,即便在模型排除所有冠心病事件时亦为如此。

研究者认为,无心衰症状参与者静息心率的加快与心衰事件风险增加相关,心率加快与全心或左心功能障碍进展相关,并且这种关系独立于亚临床动脉粥样硬化和冠心病。

原文出处:

Anders Opdahl; Bharath Ambale Venkatesh; Veronica R.S. Fernandes; Colin O. Wu; Khurram Nasir; Eui-Young Choi; Andre L.C. Almeida; Boaz Rosen; Benilton Carvalho; Thor Edvardsen; David A. Bluemke; Joao A.C. Lima.Resting Heart Rate as Predictor for Left Ventricular Dysfunction and Heart Failure: The Multi-Ethnic Study of Atherosclerosis .J Am Coll Cardiol. 2014;():. doi:10.1016/j.jacc.2013.11.027



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    2014-11-07 hbwxf
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    2014-01-14 180.173.38.28

    呼吁有兴趣者做一个meta试试,或让meta来主持大家讨论一下

    0