In AF patients with HFrEF there were positive correlations of PC levels with CLT (r = 0.317, P < 0.001) and ETP (r = 0.208, P = 0.001) along with a weak, inverse association between PC levels and Ks (r = -0.146, P = 0.023) as well as plasminogen (r = -0.162, P = 0.011). This evidence concerns the gene PLG and atrial fibrillation.