Wavelet transform for QT interval measurement in ordinary ECG
- VernacularTitle:利用小波变换的方法检测心电信号的QT间期
- Author:
Bo MA
;
Zhizhong WANG
;
Gang WANG
- Publication Type:Journal Article
- Keywords:
QT interval;
corrected QT interval;
wavelet transform;
wavelet basis
- From:
Chinese Medical Equipment Journal
1989;0(02):-
- CountryChina
- Language:Chinese
-
Abstract:
This paper mainly introduces a new method for detection of QT interval in ordinary ECG. As the interval between QRS waves and T wave in ECG, QT interval represents the depolarization of ventricle. QT interval and its aberrance can be used to forecast malignant abnormalities of heart rate. Wavelet transform is a time scale analysis method of the signal. It has a high frequency resolution and a low time resolution for the low-frequency part of the signal, and has a high time resolution and a low frequency resolution for the high-frequency part. On the basis of the characteristics of the starting point of QT interval, the second derivative of Gaussian function is adopted as the wavelet basis and applied to multi-scale transform of ECG signal. The waveforms with QRS waves as starting point and T wave as the end point are selected as the subjects. Then the measurement result is transformed into corrected QT interval, that is, QTC. QTC can be applied to forecasting the diseases.
