Aim: Epicardial adipose tissue (EAT) may be associated with arrhythmogenesis. P-wave indices such as P-wave dispersion and P-wave variation indicated a slowed conduction velocity within the atria. This study investigated the effect of dapagliflozin on EAT volume and P-wave indices.Methods: In the present ad hoc analysis, 35 patients with type 2 diabetes mellitus and coronary artery disease were classified into dapagliflozin group (n 18) and conventional treatment group (n 17). At baseline, EAT volume, HbA1c and plasma level of tumor necrotic factor-(TNF-) levels, echocardiography, and 12-lead electrocardiogram (ECG) were performed. EAT volume was measured using computed tomography. Using 12-lead ECG, P-wave indices were measured. dapagliflozin group only (-9.2 8.7 vs. 5.9 19.9 ms, p 0.01; -3.5 3.5 vs. 1.7 5.9 ms, p 0.01). The change in P-wave dispersion correlated with changes in EAT volume and plasma level of TNF-. In multivariate analysis, the change in EAT volume was an independent determinant of the change in P-wave dispersion. Conclusion: Dapagliflozin reduced plasma level of TNF-, EAT volume, and P-wave indices, such as P-wave dispersion. The changes in P-wave indices were especially associated with changes in EAT volume. The number and date of registration: UMIN000035660, 24/Jan/2019
Results: At baseline, EAT volumes in the dapagliflozin and conventional treatment groups were 113 20 and 110 27 cm 3 , respectively. Not only HbA1c and plasma level of TNF-but also echocardiography findings including left atrial dimension and P-wave indices were comparable between the two groups. After 6 months, plasma level of TNFas well as EAT volume significantly decreased in the dapagliflozin group only. P-wave dispersion and P-wave variation significantly decreased in the