Machine learning-based study on left atrial appendage hemodynamics in atrial fibrillation patients

LIU Xiaoyu; LIN Hongtao; QIAN Jianghong; CAI Shengze; FAN Hongguang; GAO Qi

doi:10.7638/kqdlxxb-2023.0223

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Machine learning-based study on left atrial appendage hemodynamics in atrial fibrillation patients

更新时间：2026-07-27

- Machine learning-based study on left atrial appendage hemodynamics in atrial fibrillation patients
- Vol. 42, Issue 9, Pages: 14-20(2024)
- 作者机构：
  
  1. 浙江大学航天航空学院,杭州,310058
  2. 杭州晟视科技有限公司,杭州,311100
  3. 浙江大学控制学院,杭州,310058
  4. 中国医学科学院阜外医院,北京,100037
  5. 浙江大学经血管植入器械全国重点实验室,杭州,310009
- 作者简介：
- 基金信息：
- DOI：10.7638/kqdlxxb-2023.0223
  CLC： O357;Q954.56
- Published：2024
- 稿件说明：
移动端阅览
刘笑语, 林洪涛, 钱姜宏, 等. 基于机器学习的房颤病人左心耳血流动力学研究[J]. 空气动力学学报, 2024, 42(9): 14−20.

LIU Xiaoyu, LIN Hongtao, QIAN Jianghong, et al. Machine learning-based study on left atrial appendage hemodynamics in atrial fibrillation patients[J]. 2024, 42(9): 14-20.
刘笑语, 林洪涛, 钱姜宏, 等. 基于机器学习的房颤病人左心耳血流动力学研究[J]. 空气动力学学报, 2024, 42(9): 14−20. DOI： 10.7638/kqdlxxb-2023.0223

LIU Xiaoyu, LIN Hongtao, QIAN Jianghong, et al. Machine learning-based study on left atrial appendage hemodynamics in atrial fibrillation patients[J]. 2024, 42(9): 14-20. DOI： 10.7638/kqdlxxb-2023.0223.

摘要

房颤是一种常见的心血管疾病，其发病率在全球范围内呈现出快速增长的趋势。房颤病人的左心房及左心耳内的血流动力学规律，比如速度场和压力场，是评估血栓形成风险的重要依据之一。目前对于心血管问题的传统研究方法是计算流体力学，尽管其精度被认可，但高昂的计算成本限制了其在临床快速诊断方面的应用。为了解决这个问题，机器学习方法开始被引入，本文提出了一种基于边卷积层和双通道的神经网络架构。经过训练，该架构可以由左心耳的点云模型，预测出内部的速度场和压力场。该架构对测试集中样本的速度场预测误差约为10%，压力场预测的误差约为5%。应用本文方法对314例房颤患者的左心房及左心耳的血流动力学特性进行研究，发现房颤患者的左心耳内流速低于正常人，而左心房平均压力高于正常人，男性相比于女性更容易患有房颤。

Abstract

Atrial fibrillation is a common cardiovascular disease with an increasing incidence worldwide. The hemodynamic patterns within the left atrium and left atrial appendage in atrial fibrillation patients

such as velocity and pressure fields

are important indicators for assessing the risk of thrombus formation. The conventional research method for cardiovascular issues is computational fluid dynamics

which

although recognized for its accuracy

is limited in its clinical application due to high computational costs. To address this issue

machine learning methods have been introduced

proposing a neural network architecture based on edge convolutional layers and dual channels. After training

this architecture can predict the internal velocity and pressure fields from a point cloud model of the left atrial appendage. The architecture achieves prediction errors of around 10% for velocity fields and 5% for pressure fields on the test dataset. Hemodynamic analysis reveals that atrial fibrillation patients have lower flow velocities in the left atrial appendage and higher average pressures in the left atrium compared to healthy individuals

and males are more prone to atrial fibrillation than females.

关键词

Keywords

references

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