No abstract available
MeSH terms
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Animals
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Drug Antagonism
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Female
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Guinea Pigs
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Heart Atria
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Heart Conduction System / drug effects*
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Male
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Norepinephrine / metabolism*
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Parasympathomimetics / pharmacology*
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Perfusion
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Piperazines / pharmacology*
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Rabbits
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Receptors, Drug / physiology*
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Sympathetic Nervous System / drug effects*
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Sympathomimetics / pharmacology*
Substances
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Parasympathomimetics
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Piperazines
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Receptors, Drug
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Sympathomimetics
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Norepinephrine