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作为人类动脉血管负荷指数的有效动脉弹性
R P Kelly1, C T Ting, T M Yang
1Department of Internal Medicine, Johns Hopkins Medical Institutions, Baltimore, MD 21205.
Circulation
|August 1, 1992
概括
有效动脉弹性 (Ea),计算为末缩压到中风体积,准确地测量了人类的动脉负荷. 这种简单的方法,Ea(PV),已被验证用于评估衰老和高血压对心脏性能的影响.
科学领域:
- 心血管生理学心血管生理学
- 生物医学工程 生物医学工程
- 临床血液动力学 临床血液动力学
背景情况:
- 动脉负荷显著影响心脏表现.
- 精确评估动脉负荷对于了解心血管健康至关重要,特别是在老龄化和高血压人群中.
研究的目的:
- 为了验证心室末缩压与中风体积 (Ea(PV)) 的简单比率作为动脉负荷的衡量标准.
- 为了比较Ea(PV) 与来自大动脉输入阻抗 (Ea(Z)) 的动脉负荷测量.
- 评估衰老和高血压对动脉负载及其对心室的影响.
主要方法:
- 在人体中同时测量心室压力-体积循环和侵入性大动脉压力和流量.
- 两种动脉负载指标的比较:Ea(Z) 来自Windkessel模型和Ea(PV) 来自末压/中风体积.
- 从常规动脉压估计Ea (PV) 的简单方法的测试.
主要成果:
- 在各种生理条件中,Ea (PV) 和Ea (Z) 显示出强烈的相关性 (r2 = 0.98).
- Ea(PV) 准确地反映了动脉负载,超过了老年高血压患者的平均动脉阻力,这是由于降低了服从和波反射.
- 通过常规动脉压测量估计Ea(PV) 的简单方法得到验证.
结论:
- 末压与中风体积 (Ea(PV)) 的比率是评估动脉负载的方便和有效方法.
- Ea(PV) 比平均动脉阻力更好地解释了由衰老和高血压引起的脉动负荷对心室的影响.
- 这种方法在动脉负载增加的情况下提供了对心脏表现的宝贵见解.
相关概念视频
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