EGF and atrial fibrillation: In patients with a C‐type EGF signature with source‐independent AF, in whom leading SAC at baseline was already below the threshold to predict freedom from AF—FIRM‐guided ablation did not result in significant improvement in SAC measured on post‐hoc EGF maps (19 ± 4% initial vs. 18 ± 4% final activity) and the overall freedom from AF was 61%.