Figure 8
Heart rate calculation. ECG waveforms in different stages of the heart rate determination scheme (a) Preprocessed ECG signal, x(n); (b) First derivative, x d (n); (c) Filtered ECG signal, x dpf (n); (d) Determination of the threshold level and masking of x dpf (n). (e)-(f) Two episodes are taken to check the efficiency of the proposed heart rate determination technique and the results of the proposed technique matched with the annotations.