Lightweight Atrial Fibrillation Model Based on Feature Fusion of Morphology and Rhythmic and Interpretability Analysis

GAO Ning; LI Yu-rong; CHEN Hong; CHEN Wen-sheng; JIA Zi-hao

doi:10.12263/DZXB.20240998

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Lightweight Atrial Fibrillation Model Based on Feature Fusion of Morphology and Rhythmic and Interpretability Analysis

PAPERS | 更新时间：2025-12-08

- Lightweight Atrial Fibrillation Model Based on Feature Fusion of Morphology and Rhythmic and Interpretability Analysis
  增强出版
- ACTA ELECTRONICA SINICA Vol. 53, Issue 2, Pages: 503-513(2025)
- 作者机构：
  
  1.福州大学电气工程与自动化学院，福建福州 350108
  2.福建省医疗器械和医药技术重点实验室，福建福州 350108
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China(62373108)
- DOI：10.12263/DZXB.20240998
  CLC： TP391;
- Received：05 November 2024，
  
  Revised：2025-01-03，
  
  Published：25 February 2025
- 稿件说明：
移动端阅览
高宁, 李玉榕, 陈泓, 等. 心电形态与节律特征融合的轻量房颤检测模型及可解释性研究[J]. 电子学报, 2025, 53(02): 503-513.

GAO Ning, LI Yu-rong, CHEN Hong, et al. Lightweight Atrial Fibrillation Model Based on Feature Fusion of Morphology and Rhythmic and Interpretability Analysis[J]. Acta Electronica Sinica, 2025, 53(02): 503-513.
高宁, 李玉榕, 陈泓, 等. 心电形态与节律特征融合的轻量房颤检测模型及可解释性研究[J]. 电子学报, 2025, 53(02): 503-513. DOI：10.12263/DZXB.20240998

GAO Ning, LI Yu-rong, CHEN Hong, et al. Lightweight Atrial Fibrillation Model Based on Feature Fusion of Morphology and Rhythmic and Interpretability Analysis[J]. Acta Electronica Sinica, 2025, 53(02): 503-513. DOI：10.12263/DZXB.20240998

摘要

房颤是一种常见的心律失常，通常与中风、心力衰竭等心血管疾病相关.近年来，虽然有许多研究者使用深度学习方法在房颤检测上取得了重大进展，但所提出的方法大都需要大量的计算资源，并且由于深度学习模型的黑盒效应，模型的检测结果较难以在临床上推广应用.为此，本文提出一种基于特征融合的轻量房颤检测模型并对其开展可解释性研究，模型由ECG（ElectroCardioGram）主干网络和RRI（R-R Interval）支路组成.ECG主干网络使用深度可分离卷积以及少量的标准卷积来提取心电信号的深层形态特征，RRI支路使用多尺度卷积提取RRI的深层节律特征，网络通过融合二者来学习全面鲁棒的特征表示，实现准确的房颤检测.进一步，基于Grad-CAM++来可视化不同特征对于分类结果的贡献实现模型的可解释性分析.本文在长期房颤数据库LTAFDB进行训练与数据集内部测试，准确率达到了97.99%.为了验证模型的泛化性能，利用MIT-BIH心房颤动数据库AFDB与中国生理信号挑战赛数据库CPSC2021开展跨数据集的外部测试，分别取得了95.17%和93.81%的准确率.实验结果表明，本文提出的方法具有轻量级特性，稳定性和准确性良好，同时可解释性深度学习的引入使得本文所提出的方法在房颤的临床诊断中具有更加广阔的应用前景.

Abstract

Atrial fibrillation (AF) is a common arrhythmia often associated with cardiovascular diseases such as stroke and heart failure. Although numerous researchers have made substantial progress in AF detection using deep learning methods in recent years

most of these methods require extensive computational resources. Moreover

the clinical application of these models is challenging due to the black-box nature of deep learning models. Therefore

this paper proposes a lightweight AF detection model based on feature fusion and conducts an interpretability study. The model comprises an ECG (ElectroCardioGram) backbone network and an RRI (R-R Interval) branch. The ECG backbone network uses depthwise separable convolutions along with a few standard convolutions to extract deep morphological features of the ECG signals

while the RRI branch employs multi-scale convolutions to extract deep rhythm features of the RRI. The network learns robust feature representations by fusing morphological features and rhythm features to detect AF accurately. As to interpretability analysis

Grad-CAM++ is utilized to visualize the contribution of different features to the classification results. In this paper

the training and dataset internal tests are conducted in the LTAFDB and achieved an accuracy of 97.99%. In order to validate the generalization performance of the model

external testing experiments are conducted using the AFDB and the CPSC2021

achieving an accuracy of 95.17% and 93.81%

respectively. Experimental results demonstrate that the proposed method is lightweight

stable

and accurate

and the incorporation of interpretable deep-learning techniques suggests that the proposed method holds significant potential for the clinical diagnosis of AF.

关键词

Keywords

references

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