[Myocardial insufficiency in infectious-allergic myocarditis].

The authors analyze the results of histologic and electron-microscopic studies of 58 endomyocardial biopsy specimens, obtained from patients with infectious allergic myocarditis aged 20 to 52. Morphologic examinations have been parallelled by studies of arrhythmias in these patients. The major parameters of hemodynamics at rest and dosed exercise have been examined by the radionuclide technique. Cardiac rhythm and conductivity disorders in infectious allergic myocarditis often aggravate the course of the disease, disturb the hemodynamics, and are prognostically unfavourable signs. These disorders result from changes in the myocardial membranes, and one of the mechanisms responsible for the membranous injuries are the dystrophic processes in the nerve fibres, terminals, and receptors of the myocardium.