No abstract available
MeSH terms
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Adrenergic beta-Antagonists / pharmacology
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Aged
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Blood Pressure / drug effects
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Digitalis Glycosides / pharmacology
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Heart Auscultation
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Heart Diseases / diagnosis
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Heart Rate / drug effects
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Humans
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Valsalva Maneuver*
Substances
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Adrenergic beta-Antagonists
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Digitalis Glycosides