Method for detecting TWA (T wave alternans) in electrocardiogram

Abstract

The invention discloses a method for detecting TWA (T wave alternans) in the electrocardiogram and belongs to the technical field of medical testing. The method comprises the following steps of: eliminating data sections with excessively high noise from selected electrocardiosignals by judging in the earlier stage so as to obtain relatively stable data suitable to analyze and carrying out analysis by taking M beats as an analysis window; firstly, extracting a T wave matrix for the M beats of electrocardiosignals and then carrying out data fitting on T waves in the T wave matrix to obtain a novel T wave matrix; respectively calculating alternans correlation indexes by a correlation analysis method to obtain an ACI (Allowable Concentration Index) of the integral analysis window); then judging whether the TWA exists in the integral analysis window by the correlation analysis method; if the TWA exists in the integral analysis window, respectively carrying out least square linear fitting on sectional odd and even beats of the existing TWA and calculating an actual TWA quantity; and if the TWA does not exist in the integral analysis window, intercepting a next analysis window to carry out analysis. According to the invention, the TWA signals can be effectively detected from the time domain angle and the TWA quantity is accurately quantized.

Description

technical field

[0001] The invention relates to a detection method for T wave alternation in an electrocardiogram, which belongs to the technical field of medical testing. Background technique

[0002] Malignant ventricular arrhythmia and sudden cardiac death are a major factor that kills lives in developed countries such as Europe and the United States, and pose a great threat to human life safety. Previous predictions of malignant ventricular arrhythmias and sudden cardiac death were mainly based on intracardiac electrophysiologic study (EPS), but in previous studies it was found that T wave alternans (TWA) is the key to the occurrence of malignant ventricular independent predictors of arrhythmia and sudden cardiac death (SCD). Ten large studies including 1300 patients from 1994 to 2000 confirmed that compared with intracardiac electrophysiological examination (EPS), the accuracy of TWA in predicting ventricular tachycardia / fibrillation and sudden cardiac death was at lea...

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