[Effect of qualitatively different fats on the structure of the aorta and the arteries of the heart and kidneys in rats].

Animals who received butter in an amount constituting 30 and 50% of the diet caloric value showed changes in the aortal walls and in intraorgan arteries of the heart and kidneys. These changes were largely marked by dystrophic impairment of vascular elasticity. They were more pronounced and occurred more frequently in rats who had received elevated amounts of butter. In these animals, changes in elastic fibers were aggravated by dystrophy of smooth muscle cells of the media whose cytoplasm demonstrated vacolization. No vascular changes were detected in animals who had been given sun flower or olive oil in an amount constituting 30 and 50% of the diet caloric value.