Subject(s)

Cardiomyopathies/etiology , Galactosidases/blood , Gangliosidoses/complications , beta-Galactosidase/blood , Cardiomyopathies/diagnosis , Female , Follow-Up Studies , G(M1) Ganglioside , Gangliosidoses/diagnosis , Heart Failure/etiology , Humans , Infant , Infant, Newborn , Male , Mitral Valve Insufficiency/etiology , Neuraminidase/deficiency