b'INTRODUCTIONEMS-treated out-of-hospital cardiac arrest (OHCA) affects more than 250,000 Americans each year and is the third leading cause of disability adjusted life years (DALYs) in the United States, following cardiovascular disease and back pain. Typically, one in ten patients survive to hospital discharge, with 80% having no or moderate neurological disability.Cardiac arrest resuscitation serves as a critical benchmark for evaluating a communitys preparedness to respond to medical emergencies. Successful resuscitation requires involvement by a range of individuals including bystanders, emergency medical dispatchers, first responders, paramedics, and hospital providers. Performing bystander CPR can nearly double survival, and public access to defibrillation results in an almost 50% survival rate for patients presenting in a shockable rhythm. It is important to remember that these impactful community-based interventions happen in advance of 911 responders arriving on the scene.Without data on key indicators, such as patient outcomes and bystander interventions, communities and EMS leadership lack the information needed to assess their performance relative to others and to evaluate the success of their quality improvement efforts. Data collection is crucial in identifying gaps and planning next steps to strengthen the chain of survival. OHCA registries fill this role by compiling standardized measures at the community, state, and national level. Benefits of participating in such registries include determining patient outcomes, uniform benchmarking, identifying opportunities for improvement, and assessing the effectiveness of specific interventions.History of CARESCARES is established byCARES introduces the CDC in collaborationCARES expands toa pre-hospital with Emory UniversitysCARES launches itsstatewide participation,supplemental School of Medicine tofirst national report,starting with Hawaii,module focused standardize data collectionproviding comparativewhich allows broaderon collecting for OHCA outcomes. data for participatingdemographic anddispatcher-assisted communities. geographic inclusion. CPR (DA-CPR) data.Atlanta, Georgia, becomesInternationalCARES receives funding from the the first community tocollaboration begins withAmerican Red Cross, American Heart participate, capturing nearlythe Pan-Asian ResuscitationAssociation, and Medtronic Foundation to 600 cases in its inauguralOutcomes Study (PAROS),expand nationally, enhance survival rates, year. enabling CARES to supportand align with new Utstein guidelines. It data collection across 13covers 25% of the US population, 4 countries in Asia. capturing nearly 50,000 cases annually.'