系统性和冠状动脉血动力学中的性别差异,心力衰竭中的冠状动脉血动力学与保存的射出分数
Rebecca Crosier1, Amélie Paquin2, Tina Zhu3
1Division of Cardiology, University of Ottawa Heart Institute, Ottawa, Ontario, Canada.
The American journal of cardiology
|August 18, 2023
概括
患有心力衰竭的老年女性具有保存的喷射分数 (HFpEF) 呈现出明显的全身和冠状动脉异常. 这些血液动力学差异,在HFpEF的男性或对照女性中没有观察到,突出显示了特定于性别的血管对HFpEF的贡献.
科学领域:
- 心脏病学 心脏病学
- 血管生物学 血管生物学
- 医疗成像医学成像
背景情况:
- 心脏衰竭与保存的喷射分数 (HFpEF) 不成比例地影响女性.
- 系统性和冠状动脉异常与HFpEF的发病有关,特别是在女性中.
研究的目的:
- 在患有HFpEF的患者中调查系统性和冠状动脉血液动力学的性别差异.
- 为了比较男性和女性之间的血液动力学概况与HFpEF和健康对照.
主要方法:
- 对32名HFpEF患者和26名对照者的横截面研究.
- 动脉血液动力学的非侵入性评估使用动脉度和心声回声学.
- 评估冠状动脉微血管功能通过鲁比-82正电子发射断层扫描 (心肌流量储备和冠状动脉血管阻力).
主要成果:
- 与HFpEF的男性相比,HFpEF的女性表现出较高的动脉负载和受损的冠状动脉血管抵抗 (CVR) 储量.
- 相比之下,对照雌性与对照雄性具有相似的血液动力学.
- 与对照女性相比,HFpEF的女性表现出更高的脉动动脉负荷和压力CVR,而男性根据HFpEF状态没有显著差异.
- 女性的脉动动脉负荷独立地与更高的E/e'和更低的心肌流量储备有关.
结论:
- 尽管左心室功能相似,但患有HFpEF的老年女性存在独特的全身和冠状动脉动脉动力学异常.
- 这些发现表明,特定于性别的血管机制有助于女性的HFpEF.
- 对这些基于性别的差异的进一步研究可能会为HFpEF提供有针对性的治疗策略.
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