Figure 4From: Ischemia episode detection in ECG using kernel density estimation, support vector machine and feature selection Selection of wavelet scale to find the time positions of QRS complexes. (a) Discrete wavelet transform and inverse transform. (b) Top: A flattened ECG waveform, fecg(n). Middle: waveform resulted from the inverse transform, pulse(n). Bottom: fecg(n) pulse ( n ) .Back to article page