No abstract available
Publication types
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Research Support, U.S. Gov't, P.H.S.
MeSH terms
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Acetylcholine / pharmacology
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Action Potentials / drug effects
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Electrophysiology
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Epinephrine / pharmacology
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Female
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Heart Conduction System*
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Humans
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Middle Aged
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Mitral Valve / drug effects
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Mitral Valve / physiology
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Mitral Valve / ultrastructure*
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Myocardial Contraction / drug effects
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Myocardium / ultrastructure*
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Verapamil / pharmacology
Substances
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Verapamil
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Acetylcholine
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Epinephrine