Figure 1From: Atrial fibrillation detection by heart rate variability in Poincare plotRemoving baseline wandering. (a) Original waveform. The baseline of the waveform is fluctuating. (b) Waveform obtained by applying inverse wavelet transform to adequately chosen coefficient vectors. This waveform is overlapped with the waveform of the left figure. (c) Subtraction result. There is no baseline wandering. The details of the leftmost figure were preserved except the baseline.Back to article page