Syndrome associated with hypertrophic cardiomyopathy

Syndrome associated with hypertrophic cardiomyopathy (Orphanet code 217595) is a broad classification grouping used by Orphanet to categorize genetic syndromes in which hypertrophic cardiomyopathy (HCM) is a prominent clinical feature. This is not a single disease entity but rather a grouping category that encompasses multiple distinct syndromic conditions where thickening of the heart muscle (hypertrophic cardiomyopathy) occurs as part of a broader multi-system disorder. These syndromes may include conditions such as Noonan syndrome, LEOPARD syndrome (now called Noonan syndrome with multiple lentigines), Friedreich ataxia, Danon disease, Fabry disease, and various mitochondrial disorders, among others. In these syndromic forms, hypertrophic cardiomyopathy is accompanied by additional clinical features affecting multiple organ systems, which may include skeletal abnormalities, intellectual disability, metabolic dysfunction, neuromuscular involvement, skin findings, or facial dysmorphism depending on the specific underlying syndrome. The cardiac involvement can range from mild ventricular hypertrophy to severe obstruction of blood flow, potentially leading to heart failure, arrhythmias, or sudden cardiac death. Because this represents a grouping of many different syndromes, the inheritance pattern, age of onset, and treatment approach vary considerably depending on the specific underlying condition. Management generally involves cardiac surveillance with echocardiography, treatment of heart failure symptoms, arrhythmia management, and addressing the specific extra-cardiac manifestations of the individual syndrome. Genetic testing and counseling are essential for accurate diagnosis and family planning.

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