Figure 2.

Age distribution of hypertrophic cardiomyopathy onset and major cardiac event (n = 524). (A) Forty-two (52.5%) of the 80 phenotype-positive children became phenotype-positive before 10 years of age. (B) Seven (41%) of 17 children with a major cardiac event experienced it before age 10 years. Pink indicates death or aborted sudden cardiac death events and red indicates implantable cardioverter-defibrillator insertion and myectomy. (C) Major cardiac event by age of onset of hypertrophic cardiomyopathy. There were 21 events in 17 children with more events in those with hypertrophic cardiomyopathy before age 10 years. MaCE, major cardiac event; SCD, sudden cardiac death.