American Heart Association hypertrophic cardiomyopathy Hypertrophic cardiomyopathy (HCM) Hypertrophic Cardiomyopathy Hypertrophic Cardiomyopathy hypertrophic cardiomyopathy American Heart Association American Heart Association Hypertrophic Cardiomyopathy Hypertrophic Cardiomyopathy hypertrophic cardiomyopathy American Heart Association hypertrophic cardiomyopathy Hypertrophic Cardiomyopathy American Heart Association hypertrophic cardiomyopathy hypertrophic cardiomyopathy