Acute cardiac care & resuscitation

Clinical Characteristics and Emergency Response to Sudden Cardiac Arrest/Death Secondary to Cardiomyopathies in Young Athletes

JACC AdvPublished observational study

Authors' conclusion

SCA/D due to CMs in young athletes occurs across a broad age spectrum and at diverse sports settings. These findings inform funding priorities and resource allocation to optimize emergency preparedness for SCA/D in sport.

Study context

Population
Young competitive athletes aged ≥11 years old competing in middle school, high school, club, college, or semiprofessional/professional sports, and former athletes (within 1 year of participation), with SCA/D related to cardiomyopathies (CMs)cases of SCA/D attributed to CMs among 454 cases with sufficient information to determine etiology, 2002 to 2023
Participants
129 athletes
Exposure
Hypertrophic CM vs arrhythmogenic CM vs other CMs
  • Hypertrophic CMn = 81
  • Arrhythmogenic CMn = 22
  • Other CMsn = 26
Outcome
SCA/D attributed to CMs
Follow-up
2002 to 2023
Methodological detailslongitudinal surveillance
  • Longitudinal surveillance

Main finding

As reported in the abstract

Cases attributed to CMs
129/454 (28.4%)

Observational data: associations, not effects.

Further findings

OutcomeValues
Activity at SCA/D eventpractice/training 74.7% · formal games/competition 25.3%
Bystander cardiopulmonary resuscitationSurvivors 97.6% · Non-survivors 80.6%
On-site automated external defibrillator useSurvivors 72.4% · Non-survivors 16.2%
  • Activity at SCA/D event: P < 0.0001
  • Bystander cardiopulmonary resuscitation: P = 0.04
  • On-site automated external defibrillator use: P = 0.0001

Age

Age range
11-27 years
Hypertrophic CM cases occurring at the youngest average age compared with arrhythmogenic CM or other CM

SCA/D events at a sporting facility

Occurred at a sporting facility
87/129 (67.4%)

Survival from SCA related to CMs

Survival
45/129 (34.9%)

Original publication

Clinical Characteristics and Emergency Response to Sudden Cardiac Arrest/Death Secondary to Cardiomyopathies in Young Athletes. JACC Adv. Published 31 July 2026. doi:10.1016/j.jacadv.2026.103093

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