Genetic analysis of unrelated patients with sporadic AF revealed several heterozygous variants in the KCNJ5 gene with potential relevance for genetic predisposition to AF: KCNJ5 c.785A>G, p.D262G, KCNJ5 c.907G>A, p.V303I, and KCNJ5 c.1159G>A, p.G387R [48]. Here, KCNJ5 is linked to atrial fibrillation.