Channel pace-making signal detection method of electrocardiogram machine

A pacing signal and detection method technology, applied in the directions of diagnostic recording/measurement, medical science, sensors, etc., can solve problems such as error in detection results, and achieve the effect of simple method, improved effect, and reduced impact

Active Publication Date: 2013-01-02
GUANGDONG BIOLIGHT MEDITECH CO LTD
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Problems solved by technology

However, since the above method does not take into account the influence of noise, there will be large errors in the detection results

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  • Channel pace-making signal detection method of electrocardiogram machine
  • Channel pace-making signal detection method of electrocardiogram machine
  • Channel pace-making signal detection method of electrocardiogram machine

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Embodiment Construction

[0030] refer to figure 1 , an electrocardiograph channel pacing signal detection method of the present invention, the present invention can be applied to the ECG signal processing of 12 leads, and the signal processing on each lead includes the following corresponding steps.

[0031] Step (1), sample the original signal to obtain x(n), the sampling frequency can be 1000Hz, and the M latest data obtained by sampling are stored in the data buffer ecg[M]. Generally, each channel only needs to buffer the latest The latest data of 32ms is enough. The sampled signal is differentially processed to obtain y(n), and the amplitude of the differential signal is Peak(n). The N latest data of differential processing are stored in the data buffer y[N]. Among them, The differential processing method for the sampled signal is y(n)=x(n)-x(n-1), where x(n-1) is the previous sampling signal of x(n). refer to Figure 2-Figure 4 ,in figure 2 is the original ECG signal diagram containing the pa...

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Abstract

The invention discloses a channel pace-making signal detection method of an electrocardiogram machine, comprising the following steps: (1) carrying out sampling on original signals and carrying out differential processing on the sampled signals; (2) setting necessary conditions C1 for judging pace-making signals on the basis of a first threshold TH and a second threshold TH_Trail, detecting differential signals y(n) and filtering pulse spikes according to the necessary conditions C1; and (3) counting the number of spikes with high slope and low slope around the filtered pulse spikes, and carrying out noise evaluation on the filtered pulse spikes on the basis of the counted number. By utilizing the channel pace-making signal detection method, the noise and correct pace-making signals can be effectively distinguished, the accuracy of magnetic resonance angiography (QRS) detection and noise level evaluation is improved, therefore, the channel pace-making signal detection method can be conveniently applied on detection processing of channel pace-making signals of the 12-lead electrocardiogram machine, thus having good improvement effect in the process of detecting and analyzing electrocardiosignals.

Description

technical field [0001] The invention relates to a detection method of an electrocardiographic signal, in particular to a detection method of a pacing signal of an electrocardiograph channel. Background technique [0002] The pacing signal in the pacing ECG is a high-frequency component in the ECG signal. If it is not processed, it may affect the detection of the ECG waveform, the detection of feature points, and the extraction of waveform features. It also affects the estimation of high-frequency noise components in signal quality assessment. US Patent No. 5682902 "Methods for Detection and Processing of Cardiac Pacing Signals" proposes to use software to detect pacing signals. The method is as follows: (1) Differentiate the signal segments of each channel in a fixed format; (2) at a fixed time Search within the range for two points whose differential signal amplitude exceeds the detection threshold and the direction is opposite; (3) Update the detection threshold. However...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/0452
Inventor 勾大海
Owner GUANGDONG BIOLIGHT MEDITECH CO LTD
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