Electrocardiographic signal denoising method and device

Abstract

The invention discloses a method for denoising an electrocardiographic signal, comprising the steps of: determining the high-frequency region and the low-frequency region of the electrocardiographic signal when the electrocardiographic signal is obtained; filtering the electrocardiographic signal through a first filter According to the interference signal filtered out by the first filter, the mathematical expression of the power frequency interference signal in each low-frequency area signal section is fitted; the ECG signal in each high-frequency area signal section and the adjacent low-frequency area signal section The fitted power frequency interference signal is subtracted; the low-frequency signal obtained after filtering and the high-frequency signal obtained after the subtraction are spliced ​​in the original order; the spliced ​​ECG signal is passed through the first The second filter performs high-frequency filtering processing. The invention also discloses an electrocardiographic signal denoising device. The invention realizes the filtering of power frequency interference signals and other high frequency interference signals in electrocardiographic signals, retains the inherent high frequency components of QRS wave groups, and has the characteristics of low distortion.

Description

technical field [0001] The invention relates to the field of medical technology, in particular to a method and device for denoising electrocardiographic signals. Background technique [0002] Heart disease is one of the diseases with the highest morbidity and mortality rate today, and the prevention and diagnosis of heart disease has become an important issue in today's medical field. For a century, electrocardiogram technology has been used as an important means of heart disease diagnosis because of its advantages of simple operation method and no invasive damage to patients. [0003] ECG diagnosis is based on the ECG waveform, so the signal quality is particularly critical. ECG signals are often accompanied by various noise signals such as power frequency interference, baseline drift, and myoelectric interference. Strong signal interference will seriously affect the diagnosis of ECG. [0004] At present, there are many methods for denoising ECG signals, which can be roug...

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Problems solved by technology

[0006] The main purpose of the present invention is to provide a method and device for denoising ECG signals, aiming to solve the problems of severe distortion of QRS wave groups and loss of inherent high-frequency components when common ECG filtering algorithms process ECG signals, so as to accurately filter out Power frequency interference and other high frequency interference signals in ECG signals

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