[Course of myocardial mitoses in normal and injured young rats].

The mitotic activity rises in the atria and auricles, in the left subepicardial zone and trabecular myocardium of both ventricles of young rats after injury to the left ventricle. This rise is consequent on the increased number of dividing cells. The mitoses proceed with no disorders typical for the control groups. The relative duration of the mitotic phases is the same as in the early postnatal ontogenesis.