ELAC2 and very long chain acyl-CoA dehydrogenase deficiency: The most common genetic abnormality was familial infantile hypertrophic CM caused by the gene ELAC2 in 19 (23.5%) cases, followed by very long-chain acyl-CoA dehydrogenase deficiency gene defect (VLCAD) in 17 (21%) cases (Table 2).