Influence of 2G-hypergravity on the right atrium secretory cardiomyocytes of rats.

For elucidation of secretory cardiomyocytes adaptation to prolonged and repeated influence of changed gravity the ultrastructural and morphometrical analysis of right atrium cells was made in rats after they were exposed to primary and repeated 2G-centrifugation in ground-based experiment. It was found prolonged 2G-hypergravity resulted in hypertrophy of right atrium cardiomyocytes and stimulated of their mitochondrial associative activity and granular secretion; repeated influence induced changes differed from those after single influence.