Update in perioperative cardiac medicine 2021 ============================================= In the April 2021 issue, in [Cohn SL. Update in perioperative cardiac medicine 2021. Cleve Clin J Med 2021; 88(4):216–220, doi:10.3949/ccjm.88a.21014](http://www.ccjm.org/lookup/doi/10.3949/ccjm.88a.21014), in the final paragraph, the sentence, “Until further data are available, the risk of chronic atrial fibrillation in patients with new-onset postoperative atrial fibrillation may be warranted only in patients with a thromboembolic risk above 1.5%…” should read as follows: “Until further data are available, the risk of chronic anti-coagulation in patients with new-onset postoperative atrial fibrillation may be warranted only in patients with a thromboembolic risk above 1.5%...” This has been corrected online. * Copyright © 2021 The Cleveland Clinic Foundation. All Rights Reserved.