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Figure 1 LA MAP Recording Site in a 74-Year-Old Man With Persistent AF and LA Diameter 48 mm
(A) Fluoroscopy (left anterior oblique 30°) showing the monophasic action potential (MAP) catheter within a transseptal sheath near the left superior pulmonary vein (LSPV), and the coronary sinus (CS) catheter. (B) Digital reconstruction of left atrial (LA) confirming the MAP catheter in the LSPV antrum (NavX, St. Jude Medical, Sylmar, California). (C) Segmented 64-slice computed tomogram imported into NavX for positional reference. AF = atrial fi
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