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- W2085141805 abstract "1. In normotensive rats, removal of carotid artery endothelium results in an acute increase in diameter. This finding, observed in young animals, has not been investigated in old animals. The present study was undertaken to assess the contribution of endothelial function in the regulation of arterial stiffness in aged rats. 2. In normotensive female WAG/Rij rats, isobaric (100 mmHg transmural pressure) carotid diameter was measured in vitro in situ, using a previously described arterial preparation associated with a high-resolution echotracking technique allowing non-invasive diameter measurements under baseline conditions, after removal of the endothelium and after total relaxation of vascular smooth muscle by potassium cyanide. Histomorphometry of the carotid wall was studied after pressure fixation (100 mmHg) of the arteries. 3. Compared with younger animals (10 months), older animals (30 months) had the same baseline carotid isobaric diameter but significantly higher values of wall thickness and collagen content. In older animals, whereas total relaxation by potassium cyanide was associated with a slight but significant increase of isobaric diameter, no increase was observed after endothelium removal. 4. The results of the presnt study provide evidence that, in old normotensive rats, endothelium-dependent increases in isobaric carotid diameter are blunted. This endothelium alteration may contribute to the age-dependent increase in isobaric carotid stiffness observed in old rats." @default.
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- W2085141805 date "2001-05-11" @default.
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- W2085141805 title "Endothelium-Dependent Changes In Arterial Diameter In Old Normotensive Rats" @default.
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- W2085141805 doi "https://doi.org/10.1046/j.1440-1681.2001.03462.x" @default.
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