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新理论和中央透析压力衰减时间常数的潜在应用

Vasiliki Bikia¹, Patrick Segers², Georgios Rovas³

¹Laboratory of Hemodynamics and Cardiovascular Technology, Institute of Bioengineering, Swiss Federal Institute of Technology, EPFL STI IBI-STI LHTC, MED 3 2922 (Batiment MED), Station 9, 1015, Lausanne, Switzerland. vickybikia@gmail.com.

Scientific reports

|March 12, 2024

概括

通过从心脏周期和血压中获得的新公式,可以估计中央透气压衰减时间常数. 这种方法简化了血管健康评估,并有助于评估血管衰老.

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
医学诊断医学诊断医学诊断

背景情况:

中枢大动脉扩张压力衰减时间常数 (τ) 是与动脉硬和血管健康相关的Windkessel模型的一个关键参数.
动脉硬是病理生理学上相关的,并影响心血管风险评估.
目前评估t的方法可能需要对中央血压波进行复杂的测量.

研究的目的:

为了研究时间常数 (τ) 与心脏周期 (T) 和平均血压 (MBP) 与中心脉压 (PPc) 的比率的产物之间的关系.
利用现有的心血管参数推导和验证一种用于估计t的新型公式.
为了评估衍生式的系数的年龄和性别独立性.

主要方法:

在一个in silico群体 (n=3818) 上进行了线性拟合,以确定 τ 和 T*(MBP/PPc) 之间的关系.
从Asklepios研究 (n=2263) 的体内数据来评估衍生式.
统计分析包括相关系数和正常化根平均平方误差 (RMSE) 来评估一致性.

主要成果:

一个新的表达式得到了推导: τ ≈ 0.9 * T * (MBP/PPc),其中R2=0.9 in silico.
在体内估计和参考t值之间观察到很高的一致性 (相关系数=0.94,正常化的RMSE=5.5%).
公式的系数被发现是独立于年龄和性别.

结论:

拟议的公式提供了关于t和中央血压特征之间的关系的理论见解.
这种方法可以在不需要完整的中央血压波形的情况下进行 τ 评估,从而提高了可访问性.
这项研究为评估血管衰老和改善血管健康评估提供了额外的生物标志物.

关键词:

动脉脉冲波是一种动脉脉冲波.阿斯克莱皮奥斯研究研究中心血压的中心血压.血管年龄血管年龄风效应风效应风效应

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