[The pathomorphology and pathogenesis of acute cardiovascular failure in swine. 2. Histopathologic findings in the myocardium of swine of different populations].

Histopathological alterations of the myocardium (inflammatory processes, fibrolysis, fibronecrosis, dystrophic calcification, fatty degeneration of fibres, sarcosporidia) were recorded for quantitative evaluation from 200 hearts which had been collected from clinically intact pigs for slaughter of different populations (Leicoma, land race, Schwerfurt breed, Belgian land race). Both incidence and severity of myocardial damage in pigs of stress-sensitive populations were higher with significance than those in the less stress-sensitive Leicoma population oriented to breeding. The highest rate of pathological processes was recorded from hearts of the Schwerfurt breed. These alterations were interpreted as objectively measurable expressions of breed-dependent differences in cardiovascular stability. In this context, rates of damage were higher in hearts of low absolute mass.