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.