Reaction patterns in myocardium in response to injury

Some reactions and their components at a microscopical level in myocardium are described using evidence obtained from natural and experimental cardiac conditions. Necrosis of different types, hypertrophy, mineralization, and other changes in myocytes, changes in myocarditis, and patterns involving conductive tissue are considered. A short summary of some collected values concerning the chronology of myocardial reactions is presented. The pathogenesis of myocardial reactions is complex and is influenced by diverse factors. Although certain patterns are recognizable, firm aetiological interpretation from the pattern alone is rarely justifiable.