Figure 1.

Estimation of post‐ablation LA body area and the typical site for ERP measurement. LA body area was calculated from Carto shells by subtracting the area of the isolated pulmonary veins (shaded), the left atrial appendage, and the mitral annulus from the total area of the LA shell. The yellow tag indicates the site at which ERP measurements and AF induction protocol were performed. The activation map was recorded during coronary sinus pacing. AF, atrial fibrillation; ERP, effective refractory period; LA, left atrial