Usefulness of single nucleotide polymorphism in chromosome 4q25 to predict in-hospital and long-term development of atrial fibrillation and survival in patients undergoing coronary artery bypass grafting

We aimed to determine whether polymorphisms in chromosome 4q25 are associated with postoperative atrial fibrillation (AF), long-term AF, postoperative or long-term stroke, and long-term survival after coronary artery bypass grafting. We performed genotyping for rs2200733 and rs10033464 in white participants (n = 1,166) from the TexGen genetic registry. The development of postoperative or long-term AF, postoperative or long-term stroke, and long-term mortality were ascertained. Both rs2200733 and rs10033464 were associated with postoperative AF (odds ratio [OR] 1.41, 95% confidence interval [CI] 1.04 to 1.91, and OR 1.47, 95% CI 1.05 to 2.06, respectively). Carriers of the risk allele (T) had an increased risk of postoperative AF with preoperative β blocker (BB) (for rs2200733, OR 1.47, 95% CI 1.004 to 2.16 for those taking a BB, and OR 1.13, 95% CI 0.73 to 1.73 for those not taking a BB; for rs10033464, OR 1.89, 95% CI 1.22 to 2.93 for those taking preoperative a BB, and OR 1.04, 95% CI 0.65 to 1.65 for those not taking a BB). Both rs2200733 and rs10033464 were also associated with long-term AF (hazard ratio 1.32, 95% CI 1.05 to 1.67, and hazard ratio 1.28, 95% CI 1.00 to 1.66, respectively). Carriers of rs2200733 had increased long-term mortality (hazard ratio 1.57, 95% CI 1.10 to 2.24). These variants were not associated with postoperative or long-term stroke. In conclusion, variants in 4q25 are associated with an increased risk of postoperative or long-term AF and, possibly, mortality in whites undergoing coronary artery bypass grafting, and could potentially affect the choice of therapy used to decrease postoperative AF.