By contrast, the DPP-4 levels in the EAT showed a significant negative correlation with eGFR and a significant positive correlation with AF; and (4) in the group taking DPP-4 inhibitors, the DPP-4 levels in the SAT showed significantly higher values than in the group not taking DPP-4 inhibitors. This evidence concerns the gene DPP4 and atrial fibrillation.