Method for detecting P and T characteristic waves of electrocardiosignal

Abstract

The invention relates to a method for detecting P and T characteristic waves of an electrocardiosignal. The method comprises the following steps of: a, acquiring the electrocardiosignal of a human body to perform pre-processing; b, carrying out smoothing processing on the signals under the scale of the to-be-detected sections of the P and T characteristic waves through stationary wavelet transform; c, carrying out electrocardio data P and T characteristic wave peak value point detection by utilizing a maximum and minimum value principle; d, correcting the positions of P and T characteristic wave peak points of the electrocardio data according to a time shift correction principle; and e, evaluating a detection result by calculating three indexes of the error rate e<r>, the sensitivity S<e>and the correct prediction degree P of P and T characteristic wave detection. The electrocardiosignal is processed and smoothed by the method in the invention; therefore, the noise is effectively filtered; furthermore, low-frequency characteristic waves of the electrocardiosignal are recovered; and effective information of the electrocardiosignal is reserved.

Description

technical field [0001] The invention relates to an analysis and automatic detection technology of electrocardiographic signals, in particular to a method for detecting P and T characteristic waves of electrocardiographic signals. Background technique [0002] In recent years, the morbidity and mortality of cardiovascular and cerebrovascular diseases in my country rank first among all kinds of diseases, and have become the number one killer of human health. Among the top ten causes of death in the world, the number of ischemic heart disease ranks first. For the detection of ECG signals, ECG is undoubtedly the most effective means of diagnosing cardiovascular diseases. [0003] Its P and T waves represent the repolarization of the ventricle, which can effectively predict major heart diseases such as ventricular fibrillation and sudden cardiac death. However, due to the large amount of low-frequency components and large noise at the location of the P and T waves, and the chang...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for detecting P and T characteristic waves of ECG signals, so as to solve problems such as glitch interference and zero-crossing misplacement in existing methods.

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