Fig. (3) The proposed wavelet analysis method was applied to the atrial electrograms at the site I in the LA anterior wall of a patient with PAF. (A) ECG I lead. (B) ECG aVF. Starting point of QRS event is denoted by dotted vertical lines. Atrial electrograms were collected by distal of ablation catheter (bipolar) and non-contact EnSite array (unipolar) simultaneously at the site I in (C) and (D), respectively. The scalogram for the unipolar electrogram using wavelet transforms was displayed in (E). Weighted fine and coarse scale electrograms f_fine and f_coarse were constructed in (F) and (G), respectively.