Cardiomyopathy may be seen in all except -

cardiomyopathies (literally, "hea muscle diseases"); these can be primary--that is, principally confined to the myocardium--or secondary presenting as the cardiac manifestation of a systemic disorder. Cardiomyopathies are thus a diverse group that includes inflammatory disorders (e.g., myocarditis), immunologic diseases (e.g., sarcoidosis), systemic metabolic disorders (e.g., hemochromatosis), muscular dystrophies, and genetic disorders of myocardial fibers. In many cases, the cardiomyopathy is of unknown etiology and thus is termed idiopathic; however, a number of previously "idiopathic" cardiomyopathies have been shown to be the consequence of specific genetic abnormalities in cardiac energy metabolism or in structural and contractile proteins. (Robbins basic pathology,9th edition,pg no.396)