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Figure 1 Catheter Position

Fluoroscopic right anterior oblique (RAO) (A) and left anterior oblique (LAO) (B) views of the position of the electrical guidewire for epicardial mapping (RVOT-epi), as well as the quadripolar catheter at the endocardium of the free wall at the RVOT for endocardial mapping (RVOT-endo).