[Microcirculatory bed of the heart during peripheral arteriovenous shunting]

In the experiment performed on 108 test and 28 control dogs, by means of injection and histological methods, the effect of arteriovenous fistula on the cardiac microcirculatory bed has been studied. The arteriovenous blood shunting results in plethora and stasis in the cardiac microcirculatory bed, in dilatation of all its links, in aggregation and adhesion of the blood formed elements, in increased permeability of microvessels, in diapedesis of erythrocytes and in myocardial edema, in winding microvessels, in development of the venoarterial reaction, in hypertrophy of myocytes, recalibration and sclerosis of the microvascular walls.