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Figure 1 Fluoroscopic views (right anterior oblique [RAO] 30°, left anterior oblique [LAO] 45°) of multiple catheters simultaneously placed in the left superior pulmonary vein (LSPV), left inferior pulmonary vein (LIPV), coronary sinus (CS), and superior vena cava (SVC) to the right atrium (RA). His = His bundle.