TSMR revealed six inflammatory cytokines with protective effects against AF, including Fms‐related tyrosine kinase 3 ligand, interleukin‐6, interleukin‐7, leukaemia inhibitory factor receptor, sulfotransferase 1A1 and tumour necrosis factor ligand superfamily member 12. Here, SULT1A1 is linked to atrial fibrillation.