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Electrocardiograph (ECG) typical cardiac beat template generation method and system

A template generation and template technology, applied in the medical field, can solve problems such as simple template update rules, reduce algorithm errors, and improve work efficiency

Inactive Publication Date: 2017-11-28
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing template update rules are too simple, relying only on the matching degree between the heartbeat to be tested and the typical heartbeat or the RR interval, etc., it is easy to regard some abnormal heartbeats as normal heartbeats for template update

Method used

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  • Electrocardiograph (ECG) typical cardiac beat template generation method and system
  • Electrocardiograph (ECG) typical cardiac beat template generation method and system
  • Electrocardiograph (ECG) typical cardiac beat template generation method and system

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Experimental program
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Embodiment approach

[0030] Such as figure 1 As shown, the ECG typical cardiac beat template generation method of the present application, an implementation thereof, comprises the following steps:

[0031] Step 102: Determine an initial template. That is, the template is initialized.

[0032] Step 104: extract the parameters of the ECG signal to be detected, and calculate the maximum correlation coefficient between the ECG signal to be detected and the initial template.

[0033] In one embodiment, the maximum correlation coefficient can be specifically calculated according to the following formula:

[0034] Maxcoff=max{NCC k}

[0035]

[0036] Where H is a fixed window length, k is the number of sampling points offset, k=1 to 2H-1; i is a sequence of sampling points within a fixed length H, Beat is the heart beat to be analyzed, Temp is the heart beat template, is the mean value of template sampled values, is the mean value of sampled heartbeat values ​​to be analyzed, NCC k is the cor...

Embodiment 2

[0070] Such as image 3 As shown, the ECG typical cardiac beat template generation system of the present application, one embodiment thereof, includes an initial template determination module, a detection module, a judgment module and a processing module.

[0071] an initial template determination module, configured to determine an initial template;

[0072] A detection module, configured to extract parameters of the ECG signal to be detected, and calculate the maximum correlation coefficient between the ECG signal to be detected and the initial template;

[0073] Judging module, used for judging whether the template update rule is satisfied according to ECG parameters, noise level and maximum correlation coefficient;

[0074] The processing module is used to obtain a new heartbeat template by performing weighted calculations on the initial template and the heartbeat to be analyzed when the template update rule is satisfied, otherwise, continue to use the initial template as ...

Embodiment 3

[0088] An embodiment of the method for generating a typical ECG beat template of the present application includes a memory and a processor. The memory is used to store program instructions, and the processor is used to perform the following steps according to the program instructions:

[0089] determine the initial template;

[0090] extracting the parameters of the ECG signal to be detected, and calculating the maximum correlation coefficient between the ECG signal to be detected and the initial template;

[0091] According to the ECG parameters, noise level and maximum correlation coefficient, it is judged whether the template update rule is satisfied;

[0092] If the template update rule is satisfied, a new heartbeat template is obtained by weighting the initial template and the heartbeat to be analyzed; otherwise, the initial template is continued to be used as the heartbeat template.

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Abstract

The invention provides an electrocardiograph (ECG) typical cardiac beat template generation method and system. The method comprises the steps that an initial template is determined; parameters of a to-be-detected ECG signal are extracted, and the maximum correlation coefficient of the to-be-detected ECG signal and the initial template is worked out; according to the ECG parameters, the noise level and the maximum correlation coefficient, whether template update rules are met is judged; if yes, a new cardiac beat template is obtained by conducting weighting calculation on the initial template and to-be-analyzed cardiac beats; and if not, the initial template continues to serve as the cardiac beat template. According to the ECG typical cardiac beat template generation method and system, when the template is updated, the ECG parameters, the noise level and the maximum correlation coefficient are taken into consideration synchronously, and the situation that only the matching degree of to-be-measured cardiac beats and typical cardiac beats is taken into consideration, and thus, some abnormal cardiac beats are taken as normal cardiac beats for template updating can be avoided. By utilizing the ECG typical cardiac beat template generation method and system, the templates can be selected automatically, a doctor does not need to manually select the templates, the working efficiency of the doctor is improved, and algorithmic error caused by human factors are reduced.

Description

technical field [0001] The present application relates to the medical field, in particular to a method and system for generating a typical ECG heart beat template. Background technique [0002] Cardiovascular disease is the first disease that threatens human health. In China, two-fifths of the population die from cardiovascular disease. An electrocardiogram (ECG) is a comprehensive reflection of potential changes on the body surface during the electrical activity of the heart, and each part of the ECG represents a specific physiological significance. In clinical practice, doctors use the time limit, amplitude, slope, and area of ​​P, Q, R, S, T and other waves as the basis for the diagnosis of arrhythmia and other diseases. For example, broadening of P waves is an important feature of left atrium enlargement. PR interval is too long, is an important basis for the diagnosis of atrioventricular block. To measure the P, Q, R, S, T wave duration, amplitude and other characteri...

Claims

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Application Information

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IPC IPC(8): A61B5/0402
CPCA61B5/318A61B5/35
Inventor 叶继伦孙纪光王凡叶南亭
Owner SHENZHEN UNIV