Fig. 2From: Three-dimensional dominant frequency mapping using autoregressive spectral analysis of atrial electrograms of patients in persistent atrial fibrillationAEG (raw signal) sampled at 1200 Hz (upper trace) and corresponding signal after downsampling 32 times (Fs = 37.5 Hz). PSD estimation of the raw signal using FFT, followed by the PSD of the downsampled signal using AR Yule-Walker approach with model order p = 50 and p = 18Back to article page