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Electrocardiosignal analysis method of T wave alternans scatter diagram method based on morphology

A technology based on morphology and ECG signals, applied in the field of biomedical signal processing, can solve the problems of difficulty in detecting the alternating amplitude of T waves in each cardiac beat, complex calculations, etc., and achieve intuitive morphological calculations, simple calculations, and good robustness Effect

Inactive Publication Date: 2013-04-03
SHANDONG NORMAL UNIV
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Problems solved by technology

Aiming at the disadvantages of spectral analysis method to detect T wave alternation, such as complex calculation and difficulty in detecting the amplitude of T wave alternation in each cardiac beat, a research on T wave alternation scattergram method based on morphology is proposed, which provides a basis for relevant domestic clinical research. A New Effective Quantitative Index for T-wave Alternation Detection

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  • Electrocardiosignal analysis method of T wave alternans scatter diagram method based on morphology
  • Electrocardiosignal analysis method of T wave alternans scatter diagram method based on morphology
  • Electrocardiosignal analysis method of T wave alternans scatter diagram method based on morphology

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Embodiment Construction

[0050] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the following description is only for explaining the present invention and not limiting its content.

[0051] A kind of ECG signal analysis method based on the T wave alternating scatter diagram method of morphology, comprises the following steps:

[0052] (1) Select ECG signals and perform ECG signal preprocessing: Obtain ECG signals from the American MIT / BIH standard arrhythmia database and the European ST-T ECG database, and remove baseline drift, power frequency interference and EMG interference random interference, and obtain ECG signals with obvious characteristics. Use the simple integer coefficient method to remove the 50Hz power frequency interference, use the zero-phase digital filter to remove the baseline drift of the ECG signal, and use the bior2. electric signal.

[0053] (2) Obtain sampling points:

[0054] We use...

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Abstract

The invention discloses an electrocardiosignal analysis method of a T wave alternans scatter diagram method based on morphology. Aiming at the defects of difficulty in detection of each heart beat T wave alternans amplitude value and complexity in calculation of T wave alternans detection by the spectrum analysis method, the T wave alternans scatter diagram method based on morphology is provided to provide a new effective quantitative index of T wave alternans detection for development of domestic related clinical researches. The method includes: using the T wave window analysis method for sampling T waves of 128 continuous heart beats selected from the American MIT-BIH standard heart beat irregularity database and the European ST-T electrocardio database, making a differential scatter diagram by the aid of the sample points, using vector angle index of the scatter diagram for quantitative analysis of T wave alternans to obtain a vector angle index range for judging whether T wave alternans exists or not, and comparing a T wave alternans detection result obtained by means of the vector angle index of the scatter diagram with the T wave alternans detection result obtained by means of the T wave alternans amplitude of the spectrum analysis method to judge reliability in detection of T wave alternans by the vector angle index.

Description

technical field [0001] The invention relates to an electrocardiographic signal analysis method, in particular to an electrocardiographic signal analysis method based on a morphological T-wave alternating scattergram method. The invention belongs to the technical field of biomedical signal processing. Background technique [0002] T wave alternans (T Wave Alternans, TWA) is an electrocardiographic variation phenomenon in which the shape, polarity and amplitude of the T wave on the body surface ECG alternately change beat by beat when the heart rhythm is regular. Although there is no consensus on the relationship between the mechanism of T wave alternation and ventricular arrhythmia, a large number of clinical and animal experiments have shown that T wave alternation is associated with ventricular arrhythmia, ventricular tachycardia, ventricular fibrillation, sudden cardiac death, etc. There is a direct link, and microvolt-level T wave alternation has become an important indi...

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Application Information

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IPC IPC(8): A61B5/0452
Inventor 赵捷郭慧李菲李田田
Owner SHANDONG NORMAL UNIV
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