A single-lead f-wave extraction method and device for electrocardiographic signals

Abstract

The embodiment of the present invention discloses a single-lead f-wave extraction method and device for electrocardiographic signals. According to the R-peak position of the detected electrocardiographic signals, the electrocardiographic signals are cut into multiple individual initial heart beat signals; Gaussian enhancement is performed on the heartbeat signal to obtain the heartbeat signal after Gaussian enhancement; the nearest neighbor algorithm based on DTW distance is used to determine the K nearest neighbor heartbeats of each heartbeat signal. Calculate the DTW residual vectors of each cardiac beat signal and its corresponding K neighboring cardiac beats, and obtain the f-wave signals of each cardiac beat signal according to the DTW residual vectors; splicing each f-wave signal to complete the extraction of the ECG f-wave. Using K neighboring heartbeats as templates, the corresponding heartbeat signals are reconstructed by DTW, and the obtained K residual vectors are averaged to obtain f waves, which realizes the correction of R peak detection errors, reduces the influence of distorted QRS waves, and improves It improves the accuracy of f-wave extraction and provides a reliable basis for the clinical diagnosis of atrial fibrillation.

Description

technical field [0001] The invention relates to the technical field of electrocardiographic signals, in particular to a single-lead f-wave extraction method and device for electrocardiographic signals. Background technique [0002] Atrial fibrillation is a common heart rhythm disorder. The incidence of atrial fibrillation increases with age. Atrial fibrillation can cause stroke and heart failure, which poses a serious risk to public health. Among heart disease patients, those with atrial fibrillation were twice as likely to die. When atrial fibrillation occurs, the frequency of atrial excitation reaches 300 to 600 times per minute, and the P wave of normal ECG disappears, replaced by continuous, irregularly trembling f wave. The physical parameters of f wave, such as amplitude and frequency spectrum, are often used in the clinical diagnosis of atrial fibrillation, which is of great significance to the study of the mechanism of atrial fibrillation electrophysiological acti...

AI Technical Summary

Problems solved by technology

Although the single-lead method is convenient for mobile ECG monitoring, it is sensitive to abnormal cardiac beats such as ventricular premature beats, and the detection accuracy is low.

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