Cardiac arrest is a critical medical emergency characterized by the abrupt cessation of cardiac mechanical activity, resulting in the loss of effective circulation and subsequent blood flow to vital organs, including the brain. Common etiologies include acute myocardial infarction, severe arrhythmias, and other underlying cardiovascular disorders. Not to be confused with a heart attack, which involves blood flow obstruction without immediate cessation of heart function, cardiac arrest necessitates immediate intervention, such as CPR and defibrillation, within the context of established emergency response protocols like ICS and NIMS.
Category context: Patient care, assessment, interventions, triage, and EMS system terms commonly used by firefighter/medics.