People with dilated cardiomyopathy have enlarged and weakened hearts that cannot pump blood through the body efficiently. In some cases, including Leonard's, the condition leads to sudden cardiac arrest. Leonard, a 16-year-old junior who had scored more than 1,000 points in his high school basketball career, had just completed a game-winning overtime shot when he collapsed Thursday night.
The American Heart Association has advised that children with dilated cardiomyopathy should not play competetive sports "because of the possibility of a sudden collapse or increased heart failure."
But many athletes -- including Leonard -- don't know they have dilated cardiomyopathy in the first place. The condition often goes undetected, said Dr. Steven J. Fowler, a cardiac electrophysiologist at NYU Langone Medical Center. "The people at most risk for sudden cardiac death often have the least amount of symptoms," he said in a statement.
Indeed, earlier in the week Leonard's coach told a reporter that the young athlete took "care of his body better than probably anybody I've ever coached" and spent "a lot of time on his own in the weight room."
SOURCE: LA Times