Figure 2.
The EnSiteTM images viewed from the right demonstrate that the carina between the right superior and inferior pulmonary veins exhibits a low voltage (< 0.5 mV) (white arrow) (A). The electrical activation has turned around the right pulmonary veins in a figure of 8 circuit projected from right lateral view (white dotted lines) (B) and right anterior view (white lines) (C). The blue tags between the right superior and inferior pulmonary veins indicate the successful ablation points of the figure of 8 atrial tachycardia (D). The orange tags on the incomplete anterior and posterior lines of the previous pulmonary vein antrum isolation (PVAI) lines indicate the successful ablation points of the repeat PVAI (B).