No abstract available
MeSH terms
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Animals
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Catecholamines / physiology
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Electric Stimulation
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Female
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Guinea Pigs
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Heart / drug effects*
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In Vitro Techniques
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Male
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Myocardial Contraction / drug effects*
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Ouabain / analogs & derivatives*
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Ouabain / antagonists & inhibitors
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Ouabain / pharmacology
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Papillary Muscles / drug effects
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Propranolol / antagonists & inhibitors
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Propranolol / pharmacology*
Substances
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Catecholamines
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Ouabain
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Propranolol