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Intracardiac ultrasonography has substantially facilitated radiofrequency ablation procedures. Left, Linear phased array probe. Middle, Placement of the probe in the right atrium (RA) allows visualization of the left atrial pulmonary vein orifices (right) without the need for placing another catheter in the left atrium (LA) itself. LIPV = left inferior pulmonary vein; LSPV = left superior pulmonary vein.
