AIM: To compare the diagnostic value of body surface potential mapping (BSPM) and electrocardiogram (ECG) and high frequency ECG (HFECG) for coronary heart disease (CHD).
目的：比较体表电位标测(BSPM)、心电图(ECG)和高频心电图(HFECG)三种心电方法对冠心病(CHD)的诊断价值。
Original ECG preprocessing:remove noise such as high-frequency power supply and interference factors such as baseline drift by wavelet function and filter;
原始心电信号的预处理：利用小波降噪函数和滤波器去除电源干扰的高频噪声和基线漂移及抖动等干扰因素；
Original ECG preprocessing:remove noise such as high-frequency power supply and interference factors such as baseline drift by wavelet function and filter;
原始心电信号的预处理：利用小波降噪函数和滤波器去除电源干扰的高频噪声和基线漂移及抖动等干扰因素；
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