[Metabolic disorders in the myocardium in noncoronarogenic diseases].

Metabolic disorders develop in the myocardium in its noncoronarogenic diseases as a consequence of changes in the myocardiocyte electrolyte balance, disturbed energy potential of the muscle cell, changes in the properties of the myoplasm protein, and the direct damaging action on the cell organnelles. The authors studied the metabolic processes in the myocardium in myocardial dystrophy, myocarditis, and cardiomyopathy (55 cases). Subendomyocardial biopsy was conducted in 18 patients, post-mortem material was studied in 42 cases.

[Classification of non-coronarogenic myocardial damage].

A working classification of noncoronarogenic damage to the cardiac muscle is suggested in which 4 general-pathology groups are considered: myocardial dystrophies, myocarditis, cardiomyopathy, and neoplasms. The main principles are presented for grouping diseases of the myocardium not associated with ischemic heart disease, hypertension or rheumatic fever. Certain problems of the clinical picture and differential diagnosis of dystrophic, inflammatory, and idiopathic damages to the heart muscle are discussed.