CONCLUSION
Perimitral, roof-dependent, and CTI-dependent flutters can mimic a focal AT with centrifugal propagation. These pseudo-focal ATs result from endocardial scarring at distinct anatomical areas, which favors masked conduction via protected epicardial bundles. Blocking the anatomical isthmus of these well-defined flutters is more efficient than ablating the breakthrough site. Thus, comprehensive entrainment pacing maneuvers are crucial for the correct diagnosis of the macroreentrant mechanism and opt for an adequate ablation strategy.