Abstract 16954: Burden of Sports-Related Sudden Cardiac Death in a US Community
Introduction: Sports-related sudden cardiac death (SCD) constitutes an important problem with devastating effects on society. Existing studies have focused principally on young competitive athletes and there is no information regarding the burden of sports-related SCD in the US general population.
Hypothesis: Sports related SCD represents a unique subset of SCD with distinctive characteristics and outcomes.
Methods: SCD cases aged 15-75 yrs were identified in a large, ongoing, prospective, population-based study in a Northwestern US metro region (population approx. 1 million) (2002-2012). Cases occurring during sports activity were compared to those unrelated to sports in terms of incidence, characteristics, and outcomes.
Results: The overall incidence of SCD was 437.4 (95%CI 430.3-444.5) per million per year, more frequent among men compared to women (RR 2.14, 95% CI 1.84-2.49). Of the 1894 SCD cases, 82 (4.3%) occurred during sports, yielding an incidence of 14.7 (95% CI 7.6-21.8) per million per year. The incidence of sport-related SCD was higher among men compared to women, especially in the 35-54 year age group (RR 10.66, 95% CI 1.37-82.57). The 3 most common sport activities during the SCD event were running (27%), basketball (15%), and cycling (15%). Cases of sports-related SCD, compared to those unrelated to sports, were younger (mean age 50.6±12 vs. 55.9±14, P<0.0001), more likely to be male (92.7 vs. 72.0 %, P1 cardiovascular risk factor (41.0 vs. 62.1 %, P<0.0001), greater proportion witnessed (88.6 vs. 54.2%, P<0.0001), with more bystander cardiopulmonary resuscitation (50.6 vs. 25.6%, P<0.0001), and greater proportion of ventricular fibrillation at emergency medical services arrival (85.9 vs. 49.3%, P<0.0001). Survival to hospital discharge was higher for sports-related SCD (25.3 vs. 12.8 %, P=0.01). However, after adjustment for influencing factors, sports-related SCD was not associated with survival (OR=0.81, 95%CI 0.39-1.68, P=0.57).
Conclusions: SCD during sports has distinct characteristics and outcome compared to overall SCD, with women appearing to have a particularly low risk. These findings could have implications for future screening and management, but should be confirmed in other US populations.
- © 2013 by American Heart Association, Inc.