Role of Catecholamine Surge and Physiological Stress Response in Sudden Cardiac Death During Assault: A Narrative Review and Forensic Synthesis

Abstract

Background: Sudden cardiac death during or shortly after assault presents a difficult medico-legal problem. In some cases, death is explained by direct trauma, commotio cordis, asphyxia, intoxication, or pre-existing heart disease. In others, the physical and psychological stress of assault may precipitate a fatal cardiac event through acute sympathetic activation, catecholamine surge, myocardial oxygen demand–supply mismatch, coronary vasospasm, stress cardiomyopathy, or malignant arrhythmia. Objective: To review the role of catecholamine surge and physiological stress response in sudden cardiac death during assault and to synthesize current evidence into a practical forensic framework. Methodology: A narrative literature review was conducted using studies, reviews, forensic case reports, registry analyses, and medico-legal discussions published up to 2026. Search themes included “sudden cardiac death,” “assault,” “catecholamine surge,” “physiological stress,” “Takotsubo syndrome,” “commotio cordis,” “post-mortem catecholamines,” “restraint death,” and “forensic pathology.” Evidence was grouped into mechanistic pathways, assault-related triggers, vulnerable cardiac substrates, forensic markers, and interpretive cautions. Results: The evidence supports a biologically plausible link between assault-related acute stress and sudden cardiac death, especially in individuals with coronary atherosclerosis, myocardial fibrosis, cardiomyopathy, channelopathy, stimulant exposure, or hypertensive heart disease. Catecholamine excess may precipitate ventricular arrhythmia, coronary vasospasm, plaque rupture, stress cardiomyopathy, and myocardial contraction-band necrosis. However, catecholamine surge is rarely sufficient as a stand-alone cause of death and must be interpreted alongside injuries, toxicology, scene evidence, resuscitation records, histology, and molecular testing. Seven synthesis tables are presented to organize mechanisms, evidence, differential diagnosis, and forensic interpretation. Conclusion: Assault can act as a trigger for sudden cardiac death through adrenergic and physiological stress pathways. The strongest conclusion is usually not that “stress alone caused death,” but that assault-related stress contributed to a fatal cardiac event in a vulnerable individual. A defensible forensic opinion requires exclusion of direct traumatic, asphyxial, toxicological, and natural causes, and careful assessment of the temporal relationship between assault and collapse.