摘要
在单导联的房颤信号(f波)提取中,常用模板对消类方法易受QRST波群的形态变化以及R点检测偏差的影响。为克服上述问题,提出一种基于DTW距离的房颤信号提取方法。首先,通过高斯增强来提高R峰周围心电在近邻心拍计算中的权重,并基于DTW距离找到每个心拍对应的近邻心拍;然后,以各近邻心拍为模板对目标心拍进行DTW重构,并求出各近邻心拍与对应重构目标心拍的残差;最后,通过平均残差得到干净的f波。对单导联f波提取的仿真与实验结果表明:本文方法能够更为准确地提取f波,且对QRST波的形态变化以及R点检测偏差有较强的鲁棒性。
In single lead atrial fibrillation(f-wave)extraction,the common template cancellation methods are easily affected by the morphological changes of QRST complex and R-point detection bias.In order to overcome the above problems,a method of extracting atrial fibrillation signal based on DTW distance is proposed.Firstly,Gaussian enhancement is used to improve the weight of ECG around R peak in the calculation of neighbor beats,and the nearest neighbor beats corresponding to each beat are found based on the DTW distance.Then,the DTW reconstruction of the target beat is performed with each neighbor beat as the template,and the residuals of each neighbor beat and the corresponding reconstructed target beat are calculated.Finally,clean f-wave is obtained by average residual.The simulation and experimental results of single lead f-wave extraction show that the proposed method can extract f-wave more accurately,and has strong robustness to the morphological changes of QRST waves and R-point detection bias.
作者
罗捷
杨文潇
Luo Jie;Yang Wenxiao(Guangdong University of Technology,Guangzhou 510006,China)
出处
《自动化与信息工程》
2020年第6期28-31,40,共5页
Automation & Information Engineering
关键词
房颤信号提取
DTW距离
高斯增强
心拍重构
atrial fibrillation signal extraction
DTW distance
beat reconstruction
