[The indices of the proteinase-peroxidase and phosphatase activities of the blood polymorphonuclear leukocytes in the differential diagnosis of dilated cardiomyopathy and idiopathic myocarditis].

The indices of cytochemical activity of the proteinase-peroxidase system and phosphatases of polymorphous-nuclear leucocytes were studied in patients with dilated cardiomyopathy and idiopathic myocarditis. It was found that patients with dilated cardiomyopathy showed an increased level of cationic proteins in polymorphous-nuclear leucocytes while an increase of alkaline phosphatase activity and acid phosphatase against the background of reduction of the cationic protein level and peroxidase activity was characteristic of idiopathic myocarditis. The obtained data allow to use the above cytochemical parameters in the differential diagnosis of noncoronarogenic lesions of the myocardium.