Freedom from death or transplantation for 855 children with idiopathic hypertrophic cardiomyopathy, by age at diagnosis. Data are from the Pediatric Cardiomyopathy Registry for the period between 1990 and 2002. [From Colan SD, Lipshultz SE, Lowe AM, et al. Epidemiology and cause specific outcome of hypertrophic cardiomyopathy in children: findings from the Pediatric Cardiomyopathy Registry. Circulation 2007;115:777, with permission.]