Histologically, multifocal areas of cardiomyocyte necrosis (Fig. 1D), characterized by fragmentation and hypereosinophilia of myofibers, and sometimes vacuolation, pyknotic or absent nuclei, were ...

We used sections stained with hematoxylin and eosin to compare histological morphology and to quantify anaphase bridges and pyknotic nuclei. Unstained sections were stained for apoptotic cells ...