KCNJ11 and coronary artery disorder: Comparing patients with coronary artery disease (CAD), microvascular dysfunction, and normal coronary arteries [11], the SNPs rs5215_GG, rs5218_CT, and rs5219_AA for the gene KCNJ11 encoding for Kir6.2 subunit of KATP were more frequently observed in patients with anatomically and functionally normal coronary arteries.