Table 2 Causes of sudden cardiac deaths in young athletes.

46%	Hypertrophic cardiomyopathy and unexplained left ventricular hypertrophy
19%	Coronary artery anomalies
⩽5%	Myocarditis
	Ruptured aortic aneurysm (Marfan syndrome)
	Arrhythmogenic right ventricular cardiomyopathy
	Tunnelled (bridged) coronary artery
	Aortic valve stenosis
	Atherosclerotic coronary artery disease
	Dilated cardiomyopathy
	Mitral valve prolapse
<1%	Long QT syndromes