EHMT2 and atrial fibrillation: The expression of miR-205-5p and EHMT2 in the atrial appendicular tissues of AF patients was tested by RT-qPCR and western blot analysis, which showed that miR-205-5p expression was lowered 0.64-fold and EHMT2 expression was elevated (mRNA: 1.63-fold; protein: 1.84-fold) in the AF group in comparison to the SR group (Fig. 1A–C).