Emergency medical services (EMS) agencies that adopt four or more critical best practices have higher rates of survival among cardiac arrest patients than their peers, a nationwide study co-led by a UT Southwestern Medical Center researcher found. The study, published in JAMA Cardiology, identified seven key practices related to simulation training, cardiopulmonary resuscitation, and transport that were associated with favorable neurological survival for out-of-hospital cardiac arrest (OHCA).