TLR2 and atrial fibrillation: However, no difference in interluekin (IL)-6 content was found among the three groups, and no correlation was found between TLR2 and IL-6 in PeAF patients (r = 0.090, P = 0.706), PaAF patients (r = 0.408, P = 0.131) and AF patients (r = -0.301, P = 0.079).