Sudden cardiac death in competing athletes is usually caused by unsuspected 
heart disease, and pre-participation screening may reduce the incidence of this 
tragic event. Although the cost-effectiveness of screening programs is unclear, 
international sports associations are currently implementing mandatory screening 
of elite athletes. During the first year of screening in the top Danish soccer 
league, all athletes were found to be eligible for continued participation in 
the game, suggesting that concern about false positive screening results may be 
exaggerated.