Clinical outcome
We evaluated the effect of elimination of DFAs on AF maintenance, as confirmed by the composite endpoint: (1) termination to sinus rhythm, (2) organization of the rhythm to AT, and (3) AF CL slowing ≥ 10 ms.9 The AF CL was measured from the most rapid cycle on coronary sinus electrograms, averaged for 10 cycles during AF at the beginning and end of the catheter ablation.9 We considered elimination of DFAs had occurred when all DFAs were included in ablation targeting regions, despite failing to create complete block lines.