PMC8728866_01
The left anterior oblique view angiogram illustrates transseptal access through the anteroinferior part of the native septum, which is not covered by the ASD closure device.
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F1
Then, an 8.5 F long sheath was increased to a 12 F FlexCath steerable sheath (Medtronic, Inc, Minneapolis, Minnesota) (Figure 1).
The image depicts pulmonary vein isolation via CB ablation. The CB is positioned and inflated at the antrum of the left upper pulmonary vein (Panel A, left anterior oblique view) and the right upper pulmonary vein (Panel B, right anterior oblique view).
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F2
CB ablation was performed in deliveries of 180 seconds per pulmonary vein, and entrance and/or exit blockage was assessed by using pacing and a circular mapping catheter (Figure 2).