Figure 4. Regular AT development during repeat ablation
During repeat ablation, a total of 31 spontaneous or pacing-induced ATs
were mapped by a 3-dimentional mapping system. Prevalence of AT (left)
and details of AT circuits (right) are shown. AT was more often observed
in patients with LVA (Group B or C) than those without (group A).
Patients who underwent LVA ablation (group B) had more frequent AT
development than those did not (group C). All 6 biatrial tachycardias
developed in patients with LVA ablation (group B). AT indicates atrial
tachycardia.