Fig. 1.

(A) Catheter ablation with esophageal temperature monitoring. Pink three-dimensional dots represent sites where the esophageal temperature increased to >39 °C, even with the use of a lower energy setting (20 W). (B) The location of the esophagus close to left atrium posterior wall. Superimposition of a grid with vertical columns (left, mid, right) and horizontal rows 1–5 (left panel). The minimum distance between the left atrium posterior wall and the esophagus was measured at each segment (right panel).