Figure 3. Comparison of impedance parameters between ablation points with and without gaps.
Graphs showing pre-RFA LI (A), post-RFA LI (B), LI drop (C), pre-RFA GI (D), post-RFA GI (E), and GI drop (G) values measured in all cases and at anterior and non-anterior walls. Ablation points with a gap had lower pre-ablation LI, LI drop, and pre-ablation GI. In particular, at ablation points with a gap, the LI drop was nearly half that at points without a gap, irrespective of whether measurements were conducted at anterior or non-anterior walls. †p<0.05 and ‡ p<0.005 for comparison between ablation points with and without a gap. LI indicates local impedance; GI, general impedance; RFA, radiofrequency application.