Extraction method of electrocardiosignal R waves

An electrocardiographic signal and extraction method technology, applied in the field of medical devices, can solve the problems of complex operation, low accuracy, and large amount of operation.

Active Publication Date: 2014-02-19
重庆海睿科技有限公司
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Problems solved by technology

The difference method has the advantages of small amount of calculation for intuitive image, but weak anti-interference ability; the filter bank method has the advantages of small amount of calculation and strong anti-interference ability, but there are often false detections and missed detec

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  • Extraction method of electrocardiosignal R waves
  • Extraction method of electrocardiosignal R waves
  • Extraction method of electrocardiosignal R waves

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[0044] The specific embodiments and working principles of the present invention will be described in further detail below with reference to the accompanying drawings.

[0045] Such as figure 1 As shown, a method for extracting R waves of an ECG signal is performed according to the following steps:

[0046] First, go to step 1: Obtain the ECG signal within a predetermined time T, and perform low-pass filter preprocessing on the obtained ECG signal;

[0047] Then go to step 2: Extract the first R wave from the filtered ECG signal, and use the ECG signal segment where the first R wave is located as the initial template;

[0048] Proceed to step 3: Perform double-threshold comparison and thickness matching calculation on the acquired ECG signal, and extract other R waves within a predetermined time T.

[0049] In this example, the frequency of 400 Hz is mainly used for sampling. When low-pass filtering, low-pass filtering is performed according to the cutoff frequency of 100 Hz to improve ...

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Abstract

Provided is an extraction method of electrocardiosignal R waves. Electrocardiosignals in scheduled time T are obtained, lowpass filtering preprocessing is carried out on the electrocardiosignals, then a first R wave is extracted from the filtered electrocardiosignals, the electrocardiosignal section where the first R wave is located serves as an initial template, then dual threshold comparison and thickness matching calculation are carried out on the obtained electrocardiosignals, and other R waves in the scheduled time T are extracted. The extraction method has the advantages that the lowpass filtering, double threshold comparison and thickness matching calculation are carried out on the obtained electrocardiosignals, accuracy of electrocardiosignal R wave extraction is increased, and mistaken checking and missing inspection situations cannot occur; the calculated amount is small, common electrocardiosignal interference such as baseline shifting, R-R interphase differing, high-frequency interference and the like can be well avoided, capacity of resisting disturbance is high, the obtained electrocardiosignal R waves are visual and vivid, and diagnosis effects are good.

Description

technical field [0001] The invention relates to the technical field of medical equipment, in particular to a method for extracting R waves of electrocardiographic signals. Background technique [0002] The QRS wave is the main feature of the ECG (Eletrocardiogram) signal, so the most important thing in the Indian signal is to detect the QRS wave. This is because only after the QRS complex is determined can the heart rate be calculated, heart rate variability detected, and other details of the ECG signal further detected. At present, there are several detection methods for R wave detection: difference method, filter bank method, wavelet transform method, etc. The difference method has the advantages of small amount of calculation for intuitive image, but weak anti-interference ability; the filter bank method has the advantages of small amount of calculation and strong anti-interference ability, but there are often false detections and missed detections; The extraction effec...

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Application Information

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IPC IPC(8): A61B5/0456A61B5/352
Inventor 庞宇李章勇李捷吴强赵何婷任斌斌李泽颖
Owner 重庆海睿科技有限公司
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