In patients with DCM and co-existing AF statin treatment, higher values of NT-proBNP and IL-6 were observed than in patients without AF (1530 ± 1054 vs 1006 ± 1195, p = 0.04 and 14.16 ± 13.40 vs 6.74 ± 5.45, p = 0.02, respectively). Here, IL6 is linked to familial dilated cardiomyopathy.