左心房硬度的区域异质性影响患者特定模型的队列中的被动变形
Tiffany M G Baptiste1, Cristobal Rodero2, Charles P Sillett1
1School of Biomedical Engineering and Imaging Science, King's College London, London, United Kingdom.
PLoS computational biology
|November 5, 2025
概括
区域硬度异质性,而不是解剖学,在心房动 (AF) 中显著影响左心房生物力学. 这一发现提高了对AF原因和潜在治疗方法的理解.
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
- 医疗成像医学成像
背景情况:
- 心房动 (AF) 与心房生物力学变化有关,但根本原因 (解剖学,硬度,外部约束) 尚不清楚.
- 了解这些生物力学变化对于改善AF诊断,分层和治疗通过增强组织特征至关重要.
研究的目的:
- 为了研究区域性心肌硬和解剖特征对患者左心房 (LA) 生物力学变化的贡献.
- 开发特定患者的模型来模拟和量化LA的被动生物力学.
主要方法:
- 从CT图像创建了针对患者的LA解剖模型.
- 模拟的被动LA生物力学使用有限变形连续力学和Guccione物质定律.
- 校准和验证的区域刚度参数与储和导管阶段CT衍生变形数据相对应.
主要成果:
- 模拟的LA变形与患者特异性CT衍生的数据非常相匹配 (平均误差[公式:参见文本]毫米).
- 区域硬度在LA之间有显著的差异,前部和屋顶区域的硬度更高.
- 没有发现LA变形与壁厚或心表脂肪组织之间的相关性,但区域硬度和LA生物力学之间存在显著的相关性 (p=0.023).
结论:
- 在LA心肌硬度的区域异质性是AF中改变LA生物力学的主要驱动因素.
- 解剖学因素,如墙壁厚度和心表脂肪,在影响LA变形模式方面似乎不那么重要.
- 这些发现提供了关于AF病理生理学的见解,以及治疗干预的潜在目标.
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