According to what I understand, an ECG signal can be decomposed using wavelets into approximation coefficients and detailed coefficients at various levels. We can utilize a variety of wavelets, such as haar, db2, and sym, but sym4 is one that produces the best results. further, findpeaks or max functions/method used to extract the R point in the ECG signal. inverted signal is used to detect the Q point. Moreover, for the identification of P and T waves used the same method with different threshold values. now my question is, is there any way to identify all features/waves without using threshold values?
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