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Polar Maps of Left Atrial Metabolic Uptake. For each patient, LA FDG-uptake distributions were transformed into polar map format and normalized to the peak uptake in the left atrium. Composite distributions were constructed by averaging the left atrium FDG uptake across all patients in the Sinus, paroxysmal AF, and persistent AF groups. Metabolic heterogeneity was increased in patients with a high burden of AF. LA, left atrium; AF, atrial fibrillation.
