[Pathologic diagnostic criteria of cardiomyopathy in children].

Pathologic diagnostic criteria of the hypertrophic and dilated cardiomyopathy and comparative histologic characteristics of chronic non-specific myocarditis and restrictive cardiomyopathy are presented. The basis of the idiopathic cardiomyopathies is according to the authors, destructive and degenerative processes in cardiomyocytes, their combination with a zonal-segmentary muscle hypertrophy, dilatation and myocardium sclerosis. Dependence of the cardiomyopathy upon the mitochondrial dysfunction and the aggravation of morphological changes by viruses is emphasized.