Ligon RA, Downey LA, Gruenewald DL, et al. - A review of all pediatric cardiac catheterizations from 2012 to 2017 was conducted in order to recognize risk factors related to the risk of red blood cell transfusions (RBCTs) after pediatric cardiac catheterizations. Within 72 hours of 6,028 pediatric cardiac catheterizations, a total of 831 RBCTs transpired. The highest risk of RBCT was noted in hospitalized infants with single ventricle or complex 2-ventricle anatomy. Additional risk factors related to RBCT were the length of the procedure, blood loss, and oxygen saturations. Therefore, when planning pediatric cardiac catheterizations, operators should acknowledge these factors, especially when exposure to RBCT is not needed.