Cardiac arrest is the abrupt cessation of effective cardiac mechanical activity, resulting in the absence of circulation. As a multifaceted research concept, it encompasses the systematic investigation of its diverse etiologies, intricate pathophysiological mechanisms, clinical presentation, critical management strategies including resuscitation science, and the long-term neurological and functional outcomes. Research in this domain is paramount for advancing emergency medical care, developing effective interventions, and improving public health outcomes associated with this major cause of mortality and morbidity.