[Microspectrophotometric study of DNA concentration in the nuclei of muscle cells in the peri-infarct zone of the rabbit heart].

A comparative microspectrophotometric study of the nuclear DNA content in the myocardial cells of the periinfarction region of the left ventricle was made in rabbit hearts during different periods of experimental ischemia. A moderate increase of both the polyploid and amitotically divided nuclei were revealed. This results are discussed from the aspect of possible participation of nuclear polyploidia and mitotic division in the mechanisms of intracellular regeneration of the myocardium.