Background Sudden death from cardiac arrest in a young personmay occur during sports play after a blunt blow to the chestin the absence of structural cardiovascular disease or traumaticinjury (cardiac concussion or commotio cordis). We studied theclinical features of this apparently uncommon but importantphenomenon.
Methods We identified cases from the registries of relevantagencies and organizations, as well as news-media accounts,and developed a clinical profile of 25 children and young adults,3 to 19 years of age.
Results Each victim collapsed with cardiac arrest immediatelyafter an unexpected blow to the chest, which was usually inflictedby a projectile (such as a baseball or hockey puck). Incidentstook place during organized competitive sports in 16 cases andin recreational settings at home, at school, or on the playgroundin 9. In each instance, the impact to the chest was not judgedto be extraordinary for the sport involved and did not appearto have sufficient force to cause death. Twelve victims collapsedvirtually instantaneously on impact, whereas 13 remained consciousand physically active for a brief time before cardiac arrest.Cardiopulmonary resuscitation was administered within aboutthree minutes to 19 victims, but normal cardiac rhythm couldbe restored in only 2 (both incurred irreversible brain damageand died shortly thereafter). Seven victims (28 percent) werewearing some form of protective chest padding.
Conclusions We speculate that most sudden deaths related toimpact to the chest (not associated with traumatic injury) aredue to ventricular dysrhythmia induced by an abrupt, blunt precordialblow, presumably delivered at an electrically vulnerable phaseof ventricular excitability. This profile of blunt chest impactleading to cardiac arrest adds to our understanding of the rangeof causes of sudden death on the athletic field and may helpin the development of preventive measures.
Source Information
From the Cardiovascular Research Division, Minneapolis Heart Institute Foundation, Minneapolis (B.J.M., L.C.P.); the Office of the New Hampshire State Medical Examiner and the Department of Pathology, Dartmouth Medical School, both in Lebanon, N.H. (J.A.K.); and the National Center for Catastrophic Sports Injury Research and the University of North Carolina, both in Chapel Hill (F.O.M.).
Address reprint requests to Dr. Maron at the Minneapolis Heart Institute Foundation, 920 E. 28th St., Suite 40, Minneapolis, MN 55407-3984.
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