[Size of cardiomyocytes in different regions of the rat heart].
In rats after alcaline dissociation of the heart at the state of systol and diastol, length and width of cardiomyocytes have been measured, their volume has been calculated. Statistical characteristics of distribution connected with the first four moments have been taken into consideration. Certain size differences of cardiomyocytes in five cardiac parts have been revealed, as well as peculiarites of their variability that is connected with an individual and internal changeability. In the atria predominates the first, in the ventricles--the second. If the internal changeability of the cardiomyocytes in all the cardiac parts is mainly the same, the individual one--is different (in the atrii it is 2 times as great, in the interventricular septum it is the same as in the atrii). The individual changeability of the cardiomyocytes volume is also greater than that of their size. This also proves the variability of their proportions. The degree of their contractility makes 11--20%, differences between the cardiac parts are not significant. The data obtained could be used as normatives for various experiments.
D000818:Animals; D003971:Diastole; D005260:Female; D006325:Heart Atria; D006346:Heart Septum; D006352:Heart Ventricles; D008297:Male; D009206:Myocardium / Q000166:cytology*; D051381:Rats; D013599:Systole
Razmer kardiomiotsitov v raznykh otdelakh serdtsa krysy.