No abstract available
MeSH terms
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Echocardiography
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Ethanolamines / pharmacology*
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Female
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Fenoterol / pharmacology*
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Heart / drug effects
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Humans
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Obstetric Labor, Premature / prevention & control*
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Pregnancy
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Verapamil / pharmacology*
Substances
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Ethanolamines
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Fenoterol
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Verapamil