Table 1.

Characterization of Atrial Fibrillation (AF) in Man as defined by Wells et al. (1978).

AF Type	Description
Type 1	Discrete atrial complexes with varying morphological appearance but with discrete isoelectric baseline
Type 2	Discrete beat-to-beat atrial complexes but no isoelectric baseline
Type 3	Complex and highly irregular atrial EGMs with no discrete complexes or isoelectric intervals

Characterization of AF into three AF types, which uses the bipolar EGM morphology during AF to provide classification.