No abstract available
MeSH terms
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Animals
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Anura
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Cardenolides / pharmacology*
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Digitoxigenin / pharmacology
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Dose-Response Relationship, Drug
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Drug Synergism
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Guinea Pigs
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Heart / drug effects
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Heart Atria / drug effects
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In Vitro Techniques
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Myocardial Contraction / drug effects*
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Potassium / pharmacology
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Stimulation, Chemical
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Structure-Activity Relationship
Substances
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Cardenolides
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Digitoxigenin
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Potassium