TLR2 and atrial fibrillation: These findings suggested that lncRNA XR_001750763.2 and TLR2 may act as ceRNAs of miR-302b-3p in AF, and the mechanism of lncRNA XR_001750763.2/miR-302b-3p/TLR2 has important research significance in the occurrence of AF (Figures 7E, F and Supplementary Figure).