Abstract
Verapamil and sodium nitroprusside induce a dose dependent dilatation in the forearm arterial bed and preconstricted dorsal hand vein in man. Verapamil is about twenty times more effective in dilating arterioles than veins; sodium nitroprusside is about ten times more effective in veins than arterioles. These differences can be related to functional differences between the two types of vessel.
MeSH terms
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Adult
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Arteries / drug effects*
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Arterioles / drug effects*
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Dose-Response Relationship, Drug
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Female
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Ferricyanides / pharmacology*
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Forearm / blood supply
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Hand / blood supply
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Humans
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Male
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Middle Aged
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Muscle, Smooth / drug effects
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Nitroprusside / pharmacology*
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Vasodilation / drug effects*
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Veins / drug effects*
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Verapamil / pharmacology*
Substances
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Ferricyanides
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Nitroprusside
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Verapamil