Hemodynamic basis of renal arteriosclerosis in young greyhounds
Bjotvedt, G.; Hendricks, G.M.; Brandon, T.A.
Laboratory Animal Science 38(1): 62-67
1988
ISSN/ISBN: 0023-6764 PMID: 3367624 Document Number: 313463
Renal arteriosclerosis occurs with unusually high frequency in young race-trained greyhounds. Light and electron microscopic studies were used to examine the arterial walls of renal vessels in six greyhounds. Lesions characteristic of mechanical forces, namely pressure and shear stresses, were found consistently on the endothelial surfaces of damaged vessels. Such damage was found in both the main renal vessel and its branches. Although the patterns of endothelial damage showed quantitative differences among individuals, the qualitative features were remarkable similar in the group. Quantitatively, fibrous plaques were greatest in narrow and curved portions of renal vessels. The plaques were found on the outer luminal surfaces of the bend and the bifurcation segments, but were absent on the flow dividers. Hemodynamic forces appear to play an important role in the pathogenesis of renal fibrous plaques. Renal arteriosclerosis in greyhounds provides an excellent model for the study of pressure pulse velocity and shear stress damage under various physiological conditions.