Rate dependent exit block across the pulmonary veins has been previously
described immediately following catheter ablation. We report the case of
rate dependent PV block seen at repeat ablation 7 years after the index
procedure. To our knowledge, this is the first report of chronic rate
dependent exit block (i.e. Rate dependent exit block discovered 7 years
after circumferential PV antral isolation). We believe that, as with CTI
ablation, rate independent pulmonary vein isolation should be confirmed.