Khoury H, et al. - Using the Nationwide Readmissions Database, researchers characterized the incidence, causes, costs and predictors of 30-day readmission following coronary artery bypass grafting (CABG) in all adult patients who had isolated CABG with no other concomitant surgery between 2010 and 2014. An emergent 30-day readmission post-CABG was reported in 95,504 (11.2%) of overall 855,836 patients included. The most common reasons for readmission were associated with respiratory complications (17.1%), infection (13.5%), and heart failure (11.9%). An average readmission cost per patient was $13,392, accounting for an estimated annual cost of over $250 million. Female gender, emergent index admission, and preoperative comorbidities, including atrial fibrillation, liver disease, renal failure, among others, were identified as independent predictors of 30-day readmission. Readmission was prevented by CABG performed at a high CABG volume hospital.