Study Design: This project will be implemented through an established research collaborative of 43 hospitals in southern Ontario currently participating in the Toronto site of the Resuscitation Outcomes Consortium. A stepped wedge study design will be employed, whereby the intervention will be rolled-out sequentially to the participating hospitals over a number of time periods as sites reach pre-defined benchmarks. The multifaceted KT strategy will include 1) local multidisciplinary champions in ED, ICU, and Cardiology 2) A simple protocol for application of hypothermia, tailored to local needs and policy; 3) Identification of perceived and actual barriers to knowledge use; 4) Development of an implementation tool kit and 5) Providing timely feedback on benchmarks for hypothermia and outcomes