High‐Resolution Mapping and Histologic Examination of Long Radiofrequency Lesions in Canine Atria

Abstract

Conduction block usually occurred when continuous transmural necrosis was present, and conduction usually persisted when continuous transmural necrosis was absent. However, important exceptions were observed, including block when the ablation zone was wide but nontransmural, and conduction despite a thin line of continuous transmural necrosis.