在心脏周期内,从向前移动的脉冲波中测量局部脉冲波速度的压力依赖变化
Rahul Manoj1, Kiran V Raj2, P M Nabeel2
1Department of Electrical Engineering, Indian Institute of Technology Madras, Chennai, India. rahulmanojktym@gmail.com.
Scientific reports
|January 24, 2025
概括
这项研究引入了一种新方法,通过最小化脉冲波反射,精确测量动脉中局部脉冲波速度 (PWV). 这通过提供更可靠的PWV数据来改善心血管风险评估.
科学领域:
- 生物医学工程 生物医学工程
- 心血管生理学心血管生理学
- 医疗成像医学成像
背景情况:
- 局部脉冲波速度 (PWV) 和其压力依赖的变化是心血管风险的关键生物标志物.
- 脉冲波反射可以显著降低本地PWV测量的准确性.
- 准确的PWV评估对于有效的心血管风险分层至关重要.
研究的目的:
- 开发和验证一种用于测量局部PWV压力依赖变化的新方法.
- 为了最大限度地减少脉冲波反射对PWV测量的影响.
- 提高PWV作为心血管生物标志物的可靠性.
主要方法:
- 使用过渡时间方法从前进的脉冲波形计算PWV.
- 基于流动的波分离分析 (WSA) 应用于隔离前方波.
- 动脉直径和度数据从60名参与者中采集,使用定制的双模式探针.
- 超声波成像捕捉了WSA的頸動脈血流.
主要成果:
- 波分离分析 (WSA) 提高了PWV测量可靠性,使变化系数从25%降低到10%.
- 在WSA测量后的PWV测量与从布拉姆威尔-希尔方程中得出的参考PWV相比没有统计学上显著的差异.
- 从PWV衍生的心脏脉冲压和度测量测量之间的一致性验证了无反射PWV结果.
结论:
- 将过渡时间方法与波分离分析相结合,可显著提高局部PWV测量的可靠性.
- 这种方法提高了在心脏周期内评估压力依赖PWV变化的能力.
- 这些发现支持使用这种改进的PWV测量技术用于心血管风险分层.
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