Rapid response (RR) systems are used to improve clinical outcomes and prevent transfer to ICU of patients demonstrating signs of rapid deterioration. To evaluate its RR system, one hospital’s pediatric department reviewed all REACT (Rapid Escalation After Critical Transfer) events (i.e., cardiopulmonary arrest and/or ventilation and/or hemodynamic support) which occurred within 24 hours of the RR. These reviews identified opportunities for systemwide improvements.