Ultrastructure of atrial cardiomyocytes in adrenalin myocardiodystrophy was studied in white rat experiments. Morphometrically, there was a reduced number of mitochondria and secretory granules in the atrial muscular cells, space characteristics of cardiomyocytes and their nuclei increased. The above rearrangement of the atrial cardiomyocytes indicates that adrenalin myocardiodystrophy is associated with a decline in synthetic and secretory function of the test cardiac muscular cells.
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