Abstract
Introduction: Many Authors already described automatic activity arising
from accessory pathways, but the underlying mechanism has not been
clarified yet. They may be due to embryogenetic features of myocardium
or may be related to specific excitability during radiofrequency
ablation. Methods and results: we report the case of a man who underwent
an accessory pathway ablation in WPW Syndrome. At the end of the
procedure we found an accelerated rhythm originating at the insertion of
the accessory pathway. Conclusion: If this manifestation represents the
effect of thermal injury or if it is a real intrinsic automaticity is
not fully documented.