[Assessment of ultrastructural changes in the contractile apparatus of cardiomyocytes after heart contusion].

Experimental simulation of heart contusion accompanied by acute insufficiency of myocardial contractility was followed by examination of myocardial tissue samples using transmission electron microscopy. Analysis of microstructural changes in cardiomyocytes revealed characteristic defects in their contractile apparatus. The results were used to substantiate mechanisms underlying acute insufficiency of myocardial contractility resulting from heart contusion.