Effect of venous congestion on the microcirculatory bed of rat adrenal glands]

Early effect of experimentally induced venous congestion on the rat adrenals is evident in dynamical changes in the microcirculatory bed of the glands. As morphometric data demonstrate, the greatest changes take place in blood vessels of the cortical substance: the capillary diameters are dilated in all the zones, the thickness of the wall in subcapsular and capsular arterioles increases at the expense of hypertrophic smooth muscle elements. Subsequently, venous-arteriolar reaction develops, with capillary diameter approaching the initial size. The data obtained are discussed.