b'12Case Definition CARES captures data on all non-traumatic out-of-hospital cardiac arrests where resuscitation is attempted by a 911 Responder (CPR and/or defibrillation). This also includes patients that receive an AED shock by a bystander prior to the arrival of 911 Responders. Inclusion and exclusion criteria are described below (Tables 1 and 2). Table 1. CARES inclusion criteria (all of the following) Patients of all ages who experience a non-traumatic, out-of-hospital cardiac arrest. Patients who are pulseless on arrival of 911 Responder; OR Patients who become pulseless in the presence of 911 Responder; OR Patients who have a pulse on arrival of EMS, where a successful attempt at defibrillation was undertaken by a bystander prior to arrival of 911 Responder.Table 2. CARES exclusion criteria (any of the following) Unworked/untreated cardiac arrests, to include codes that are terminated immediately upon arrival of EMS because the patient is not a viable candidate for resuscitation due to: oInjuries incompatible with life.oSigns of decomposition. oThe presence of rigor mortis or lividity.oPresence of a valid DNR. Stillborn neonates/perinatal newborns, born without signs of life.Private EMS transport that did not involve 911 dispatch. Cardiac arrest of clear and obvious traumatic etiology. Bystander suspected cardiac arrest, where ROSC was achieved without the need for defibrillation or 911 Responder CPR.Data Collection & Elements Data collection within CARES is based on the Utstein- users, who are prohibited from viewing data from style definitionsa standardized template of uniformanother agency or hospital. reporting guidelines for clinical variables and patientData elements collected from EMS providers include outcomes that was developed by international resuscitation experts4,5.demographics (i.e. name, age, date of birth, incident address, sex, and race/ethnicity), arrest circumstances The CARES web-based software (https://mycares.net),(i.e. location type of arrest, witness status, and links three sources to describe each OHCA event: 1) 911presumed etiology), and resuscitation-specific data (i.e. call center data, 2) EMS data, and 3) hospital data. Datainformation regarding bystander CPR initiation and/or can be submitted in two ways: using a data-entry formAED application, defibrillation, initial arrest rhythm, on the CARES website, or via daily upload from anreturn of spontaneous circulation [ROSC], field agencys electronic patient-care record (ePCR) system.hypothermia, and pre-hospital survival status).Access to the CARES website is restricted to authorizedEMS providers are also able to enter a number of optional elements, which further detail arrest 4Cummins RO, Chamberlain DA, Abramson NS, et al. Recommendedinterventions (i.e. usage of mechanical CPR device, ITD, guidelines for uniform reporting of data from out-of-hospital cardiac12 Lead, automated CPR feedback device, and advanced arrest: The Utstein style. A statement for health professionals from aairway; administration of drugs; and diagnosis of STEMI). Task Force of the American Heart Association, the EuropeanThe CARES form also includes a number of optional time Resuscitation Council, the Heart and Stroke Foundation of Canada, andelements, including estimated time of arrest, initial CPR, the Australian Resuscitation Council. Circulation. 84:960-975.defibrillatory shock, sustained ROSC, and termination of5 resuscitative efforts.Supplemental data elementsPerkins GD, Jacobs IG, Nadkarni VM, et al. Cardiac Arrest andcollected from 911 call centers include the time that the Cardiopulmonary Resuscitation Outcome Reports: Update of the Utstein Resuscitation Registry Templates for Out-of-Hospital Cardiaccall was received, the time of dispatch for both first Arrest: A Statement for Healthcare Professionals From a Task Force ofresponder and EMS providers, and arrival time at the the International Liaison Committee on Resuscitation and thescene. American Heart Association Emergency Cardiovascular Care Committee and the Council on Cardiopulmonary, Critical Care, Perioperative and Resuscitation. Resuscitation. 96:328-340.'