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Method and device for detecting P-wave and T-wave in electrocardiogram (ECG) signal

An electrocardiogram and signal technology, applied in the field of signal processing, can solve problems such as complex design, poor P wave detection effect, and reduced algorithm sensitivity, to achieve accurate position detection and improve detectable efficiency

Active Publication Date: 2015-02-04
北京海思敏医疗技术有限公司
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the above method has the following problems: the window search method always assumes that P waves and T waves always exist, and when the heart rate is abnormal, the sensitivity of the algorithm is reduced; the cancellation method is more sensitive to the waveform changes of the QRS wave, The design is complicated; the wavelet transform method is not good for P wave detection, and the calculation is complicated

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  • Method and device for detecting P-wave and T-wave in electrocardiogram (ECG) signal
  • Method and device for detecting P-wave and T-wave in electrocardiogram (ECG) signal
  • Method and device for detecting P-wave and T-wave in electrocardiogram (ECG) signal

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Embodiment 1

[0021] figure 1 It is a method flowchart of an embodiment of the method for detecting P waves and T waves in the electrocardiogram signal provided by the present invention, and the execution body of the method may be a detection device integrated with digital signal processing functions. like figure 1 As shown, the method for detecting P waves and T waves in the electrocardiogram signal specifically includes:

[0022] S101, applying a peak extraction operator and a valley extraction operator to extract the peak signal and the valley signal of the ECG signal to be detected respectively, and determining the sum signal of the peak signal and the valley signal as an intermediate signal;

[0023] For a one-dimensional digital signal f(n) to be filtered with a signal length of N, the nth signal in (n=0,1,2,...,N-1) performs a structural element k(m) with a length of M ), the expansion operation (or corrosion operation) of (m=0,1,2,...,N-1) is: first invert the signal f(n) with n a...

Embodiment 2

[0044] image 3 The method flowchart of another embodiment of the method for detecting P wave and T wave in the electrocardiogram signal provided by the present invention is as follows figure 1 A specific implementation of the method shown. like image 3 As shown, the method for detecting P wave and T wave in the electrocardiogram signal is the same as figure 1 The difference of the illustrated embodiment is that the above steps 102 and 103 are further refined. Specifically, the refinement steps for step 102 include:

[0045] S301, if the search result shows that there are peaks and / or valleys within the first signal interval from the above starting point, then determine whether the width of the peaks and / or valleys is greater than the first width threshold;

[0046] Specifically, if there are peaks and / or troughs within the specified first signal interval range, it indicates that the interval range may contain P waves. Usually, the P wave has a certain width range, and t...

Embodiment 3

[0059] Figure 4 A structural schematic diagram of an embodiment of the device for detecting P waves and T waves in the electrocardiogram signal provided by the present invention, the device shown in the structural schematic diagram can perform the following steps: figure 1 The method steps of the illustrated embodiment. like Figure 4 As shown, the device for detecting P waves and T waves in the electrocardiogram signal specifically includes: a calculation module 41, a first processing module 42 and a second processing module 43; wherein:

[0060] Calculation module 41, is used for applying peak extraction operator and valley extraction operator to extract its peak signal and valley signal respectively for the electrocardiogram ECG signal to be detected, and the sum value signal of peak signal and valley signal is determined as intermediate signal;

[0061] The first processing module 42 is used for starting from the starting position of each R wave in the intermediate sign...

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Abstract

The embodiment of the invention provides a method and device for detecting P-wave and T-wave in an electrocardiogram (ECG) signal. The method comprises the following steps: respectively extracting a wave crest signal and a wave trough signal from the ECG signal to be detected by using a wave crest extraction operator and a wave trough extraction operator, and determining a sum signal of the wave crest signal and the wave trough signal as an intermediate signal; for a starting point position of each original R-wave in the intermediate signal, searching whether a wave crest and / or a wave trough exist(s) or not in a first signal interval range in front of the starting point position, and determining the position of P-wave in the first signal interval range according to the search result; searching whether a wave crest and / or a wave trough exist(s) or not in a second signal interval range behind the starting point position, and determining the position of T-wave in the second signal interval range according to the search result. With the technical scheme provided by the invention, the accurate position detection of P-wave and T-wave in the ECG signal is realized; meanwhile, the detection process of the method is simple, and the detection efficiency is effectively improved.

Description

technical field [0001] The invention relates to the technical field of signal processing, in particular to a method and a device for detecting P waves and T waves in electrocardiogram (ECG) signals. Background technique [0002] It is very important to realize the accurate detection of P wave and T wave in ECG signal in the automatic analysis and diagnosis of ECG signal. At present, the detection methods of P wave and T wave are mainly divided into three categories: one is the window search method, that is, first find the R wave position of the ECG signal, and then use the R wave position as a reference, and then search for a window in a certain area before and after it, In this window, P waves and T waves are detected through various signal changes or feature extraction; the second is the cancellation method, that is, by eliminating the QRS complexes and other noise components that occupy a large energy component, the P waves of interest are highlighted. The third is the w...

Claims

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Application Information

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IPC IPC(8): A61B5/0452
CPCA61B5/349A61B5/352
Inventor 侯桂文
Owner 北京海思敏医疗技术有限公司
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