[Idiopathic cardiomyopathies in children: a description of two rare cases (author's transl)].

Two cases of idiopathic cardiomyopathy in children are described. Although classifiable respectively as of the non-obstructive or dilating type (in case 1) and of the restrictive type (in case 2), some peculiar clinical and angiocardiographic aspects could be found which differentiated them from the typical forms. In case 1 multiple semilunar dilatations were present at the posterobasal level of the left ventricle. In case 2 the restriction of the ventricular chamber with markedly reduced compliance affected only the left ventricle, with marked dilatation of the left atrium and right side cavities. As occurs in the field of idiopathic cardiomyopathies, intermediate forms of anatomical variations can be found with clinical and angiographic atypical features.