Sareh S, Hadaya J, Sanaiha Y, et al. - In view of controversies concerning the benefit of bilateral mammary artery (BIMA) use during coronary artery bypass grafting (CABG), researchers here investigated nationwide trends in BIMA use and factors affecting its utilization. Using the National Inpatient Sample, they assessed adults undergoing isolated multivessel CABG between 2005 and 2015 and stratified them based on the use of a single mammary artery or BIMA. CABG with BIMA was performed on 4.5% (n = 60,698) of patients; a steady increase in its use was observed from 3.8% to 5.0% over time. Following were identified to be significant predictors of BIMA use: younger age, male gender, and elective admission. In addition, there were higher odds of BIMA use in correlation with private insurance vs Medicare. Although no significant differences were observed in terms of acute postoperative outcomes, uncommon use of BIMA remained in the United States. BIMA utilization seems to be influenced by several patient, hospital, and socioeconomic factors.