Abstract:
RATIONALE AND OBJECTIVES:The authors evaluated the involvement of nitric oxide and endothelin in radiographic contrast medium-induced changes in renal hemodynamics. METHODS:Eleven anesthetized healthy dogs were each studied during three periods. Thirty minutes before the first, second, and third periods, the dogs received 1 mL per kilogram of body weight of isotonic saline, L-N-nitro-L-arginine-methyl-ester (L-Name, 10 mg/kg intravenously), and L-arginine (500 mg/ kg intravenously), respectively. Renal blood flow (RBF) and mean arterial blood pressure were continuously monitored. The glomerular filtration rate (GFR) was evaluated by means of polyfructosan clearance. RESULTS:Contrast medium induced a significant (P < .05) decrease in RBF and GFR and a significant (P < .05) increase in urinary endothelin excretion. L-Name enhanced the effect of contrast media on RBF and GFR. L-arginine attenuated the effect of L-Name on the contrast medium-induced reduction of GFR. CONCLUSION:These findings support the hypothesis that acute contrast medium-induced intrarenal vasoconstriction may involve an imbalance of endothelial vasoactive agents, nitric oxide, and endothelin, and they confirm the involvement of hemodynamic changes in contrast medium-induced nephropathy.
journal_name
Acad Radioljournal_title
Academic radiologyauthors
Bagnis C,Idee JM,Dubois M,Jacquiaud C,Maistre G,Jacobs C,Deray Gdoi
10.1016/s1076-6332(97)80115-8subject
Has Abstractpub_date
1997-05-01 00:00:00pages
343-8issue
5eissn
1076-6332issn
1878-4046journal_volume
4pub_type
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