A very weak negative correlation appeared between resistin levels in PVAT and total cholesterol levels (r = − 0.2847; P = 0.00262) in the whole study group; there was no such correlation between resistin levels in PVAT and LDL, glucose in plasma, or other cholesterol levels in the whole group or the AF and non-AF subgroups. This evidence concerns the gene RETN and atrial fibrillation.