使用心血管硬件模拟器和血液动力学模型进行动脉压波形形态相似性和相对脉冲过渡时间的相关性分析
Junki Hong1, Bomi Lee1, Adelle Ria Persad1
1Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea.
Computers in biology and medicine
|July 28, 2025
概括
这项研究揭示了相对脉冲过渡时间 (RPTT) 整合了动脉脉冲波动力学,与波形形态相似性相关. 这一发现为评估心血管健康和动脉硬性提供了新的非侵入性方法.
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
- 血液动力学 血液动力学
背景情况:
- 心血管疾病是全球死亡的主要原因之一.
- 动脉压波形形态提供了诊断见解,但其生理基础尚未完全理解.
- 了解动脉硬度,心率,中风体积和波形变化之间的关系对于准确的动脉健康评估至关重要.
研究的目的:
- 研究动脉硬度 (E),心率 (HR) 和中风体积 (SV) 对动脉部位之间的波形形态相似性 (WMS) 的影响.
- 探索WMS和相对脉冲传输时间 (RPTT) 之间的关系.
- 开发和验证一种使用WMS和RPTT估计动脉脉冲波速度 (cf-PWV) 的新方法.
主要方法:
- 利用心血管硬件模拟器和血液动力学模型来隔离E,HR和SV对波形形态的影响.
- 进行了参数研究,以分析每个生理因素的影响.
- 使用实验数据与WMS和脉冲压放大比率相关联的RPTT.
- 开发了一种基于WMS-RPTT关系的cf-PWV估计方法,并将其测试在56动脉数值模型上.
主要成果:
- 动脉硬度 (E) 和心率 (HR) 显著影响动脉波形形态.
- 冲击体积 (SV) 主要影响脉冲压力大小,而不是波形特征.
- 在RPTT和WMS (斯皮尔曼r=0.982) 和脉冲压放大比率 (斯皮尔曼r=0.934) 之间发现了强烈的相关性.
- RPTT被确立为脉冲波动态的综合指标,类似的RPTT值对应于相同的波形传播模式.
- 开发的cf-PWV估计方法表现出高准确度 (皮尔森r=0.920,RMSE=0.65m/s).
结论:
- 相对脉冲传输时间 (RPTT) 有效地描述了集成脉冲波动力学.
- WMS-RPTT关系为一种新的cf-PWV估计方法提供了基础.
- 这种方法具有使用外围测量的非侵入性动脉健康评估的潜力.
- 进一步的研究可以提高对各种生理状态中脉冲波变化的理解,改善心血管风险评估.
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