Fried et al. (1979) described a Sephardic kindred in which several children had died in the second year of life. The proband showed asymmetric septal hypertrophy by echocardiography. A mild and often subclinical myopathy was present. The affected children were in 2 sibships and both sets of parents were first cousins. On echocardiography 1 of the 4 parents had findings consistent with asymmetric septal hypertrophy.
Fried, K., Beer, S., Vure, E., Algom, M., Shapira, Y. Autosomal recessive sudden unexpected death in children probably caused by a cardiomyopathy associated with myopathy. J. Med. Genet. 16: 341-346, 1979. [PubMed: 513079] [Full Text: https://doi.org/10.1136/jmg.16.5.341]