GJA1 and atrial fibrillation: Regarding the expression of inflammatory cytokines and <i>GJA1</i>, the mRNA expression levels of <i>GJA1</i> were lower and those of <i>IL-1β</i> were higher in those male OSA patients with AF than in those male OSA patients without AF and control subjects (<i>p</i> < 0.05).