Cardiovascular Effects of Clonidine-Like Drugs in Pithed Rabbits
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چکیده
منابع مشابه
Cardiovascular effects of clonidine-like drugs in pithed rabbits.
Administration (3 to 100 microg/kg IV) of clonidine, rilmenidine, and an imidazoline derivative, 2-(2-chlorophenylamino)imidazoline, in pithed nonstimulated rabbits caused a dose-dependent increase in mean arterial pressure without affecting heart rate. Prazosin (0.1 mg/kg IV) almost abolished the pressor responses to 2-(2-chlorophenylamino)imidazoline, partially inhibited those induced by clon...
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Clonidine, in low intravenous doses, inhibited the increased heart rate of pithed rats caused by peripheral sympathetic nerve stimulation. The magnitude of this effect was greatest at low frequencies of nerve stimulation, responses to high frequencies being little affected by the drug. In contrast, guanethidine reduced cardiac responses to both low and high rates of nerve stimulation. The diffe...
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We studied the influence of pretreatment with endothelin-1 on cardiac baroreflexes and on the effect of clonidine on blood pressure and heart rate. In order to avoid the complication of the direct vasoconstrictor effects of endothelin-1, initial dose-response studies in animals treated with a ganglion blocker were performed. Intravenous administration of 50, 200, and 1200 ng/kg of endothelin-1 ...
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1. Blood pressure and heart rate responses to adrenaline, noradrenaline, tyramine, 5-hydroxytryptamine and stimulation of the spinal sympathetic outflow were measured in pithed rats pretreated either with progesterone (20 mg/kg daily for 14 days) or the vehicle solution of ethyl oleate.2. Pretreatment with progesterone increased the durations but not the magnitudes of the blood pressure and hea...
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Background: The pattern of poisoning in Russia may be different from other countries. The study objective was to describe the pattern of poisoning with cardiovascular drugs in a major industrial city in Russia, Yekaterinburg. Methods: This study was part of a larger prospective multi-center study including all acute poisonings in patients older than 15 years of age in the city of Yekaterinburg...
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ژورنال
عنوان ژورنال: Hypertension
سال: 1999
ISSN: 0194-911X,1524-4563
DOI: 10.1161/01.hyp.34.4.1012