Subclinical hypothyroidism in coronary bypass surgery: Clinically significant? Or subclinical after all?

In this issue, Zhao et al. investigate the effects of subclinical hypothyroidism in coronary bypass grafting particularly with respect to the incidence of atrial fibrillation. While not the first of its kind, the authors analyze this controversial topic in a well powered, statistically comprehensive manner that furthers our understanding of the effects of SCH in CABG patients.