Key result
Intravenous clonidine (5 µg/Kg) significantly reduced the mean sympathetic discharge rate of the left splanchnic nerve in spontaneously hypertensive rats compared to untreated controls (0.90/sec vs 2.45/sec, p<0.001).
Why the study?
Does clonidine reduce sympathetic discharge rate and arterial pressure in spontaneously hypertensive rats?
Population
Spontaneously hypertensive rats at 16 weeks of age under pentobarbital anesthesia and normotensive Wistar…
Comparison
Clonidine 5 μg/Kg administered intravenously. vs Untreated spontaneously hypertensive rats and…
Design
Preclinical
Follow-up
Acute (approx. 20-30 minutes post-injection)
Authors
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Supports sympatholytic effects in this rat model; hypothesis-generating with no implications for human hypertension management.
Does clonidine reduce sympathetic discharge rate and arterial pressure in spontaneously hypertensive rats?
Absolute Event Rate: 0.9% vs 2.45%
p-value: p=<0.001
Clonidine lowers arterial pressure and sympathetic discharge rate in spontaneously hypertensive rats, supporting the role of elevated sympathetic tone in this hypertension model.
Juro Iriuchijima (1974) studied Hypertension (Spontaneously Hypertensive Rats) (n=28). Clonidine vs. Untreated spontaneously hypertensive rats was evaluated on Mean discharge rate of vasoconstrictor fibers of the left splanchnic nerve (/sec) (p=<0.001). Intravenous clonidine (5 µg/Kg) significantly reduced the mean sympathetic discharge rate of the left splanchnic nerve in spontaneously hypertensive rats compared to untreated controls (0.90/sec vs 2.45/sec, p<0.001).
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