关键词: ST-T段, 多分辨率分析, 凸点算子, 动态搜索窗

Abstract: Electrocardiogram（ECG） is one of the basic detection programs in the diagnosis of myocardial ischemia, myocardial infarction and other cardiovascular diseases, in which the ST-T segment reflects the process of ventricular repolarization. Firstly, the wavelet transform-based Multi-Resolution Analysis（MRA） is applied to correct the baseline drift and filtering of the original ECG signals. Then, by combining the convexity operator and dynamic search window, the location of the ST-T segment is obtained. Through all the data in the European ST-T database, the average recognition rate of the algorithm is more than 93%. For all regular ECG signals, the recognition rate is above 90%. This algorithm avoids the location difficulty for T wave peak. It can be effectively applied to the problem of location of R wave inversion, T wave inversion and T wave rose changes. Furthermore, since the computation complexity of this algorithm is lower, it can be well embedded into practical engineering applications.

Key words: ST-T segment, Multi-Resolution Analysis（MRA）, convexity operator, dynamic search windows