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Updated: Aug 16, 2026

A Low Mortality Rat Model to Assess Delayed Cerebral Vasospasm After Experimental Subarachnoid Hemorrhage
Published on: January 17, 2013
The supraoptic nuclei in vasopressin and hemodynamic responses to hemorrhage in rats
G Feuerstein1, R L Zerbe, A L Siren
1Department of Pharmacology, SmithKline Beecham Pharmaceuticals, King of Prussia, PA 19406.
Abstract:
Cardiovascular and vasopressin (AVP) responses to hemorrhage were studied in rats with lesions of the hypothalamic supraoptic nuclei (SONL). Bleeding caused hypotension and increase in heart rate (HR) and AVP. SONL rats failed to fully recover from bleeding as compared to normal rats. Plasma AVP in SONL rats was in the normal in basal conditions, but failed to increase to levels attained in normal rats throughout the post-hemorrhage period. These data suggest that the supraoptic nuclei are the primary regulatory sites for AVP release in response to hemorrhage and that lack of adequate AVP release significantly retards blood pressure recovery after bleeding.
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