Progressive Atrial Exit Shift in Fast-Slow Atrioventricular Nodal Reentrant Tachycardia With Right Inferior Extension of the Slow Pathway: Insights From High-Density Mapping

The optimal ablation target in cases of fast-slow atrioventricular nodal reentrant tachycardia with a long right inferior extension remains controversial. Repeated high-density activation mapping during tachycardia may be useful for identifying the optimal ablation site in the cases with atrial exit shift by radiofrequency applications.