Case:
A 75-year-old male with paroxysmal atrial fibrillation (AF) underwent
radiofrequency catheter ablation using high density mapping (Rhythmia).
Once pulmonary vein isolation (PVI) was achieved, two simultaneous
dissociated and independent ectopic rhythms were observed with the
mini-basket (OrionTM) arising from different sides of
the right superior pulmonary vein (RSPV) after PVI. These rhythms could
be observed in poles B to E, and poles F to H (Figure
1 ). What implications this phenomenon have?.