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Figure 5 Pulmonary vein mapping with a magnetic catheter. The magnetic catheter was introduced into the left atrium through a trans-septal sheath for left atrial mapping in a patient with a left posterolateral accessory pathway. Navigation of the magnetic catheter to each pulmonary vein is shown in left anterior oblique images: (A) left superior pulmonary vein; (B) right superior pulmonary vein; (C) left inferior pulmonary vein; (D) the right inferior pulmonary vein.