A mitochondrial oxidative phosphorylation disorder characterised by hypertrophic and dilated cardiomyopathy, failure to thrive, myopathy with generalised hypotonia and increased creatine kinase, developmental delay and/or regression with cerebral atrophy on brain MRI, renal manifestations including chronic renal failure, renal tubular acidosis and lactic acidosis. Additional clinical features include seizures and respiratory failure. [from
SNOMEDCT_US]