No abstract available
MeSH terms
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Anti-Arrhythmia Agents / pharmacology*
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Electrocardiography
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Humans
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Male
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Middle Aged
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Tachycardia, Supraventricular / drug therapy
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Tachycardia, Supraventricular / physiopathology*
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Verapamil / pharmacology*
Substances
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Anti-Arrhythmia Agents
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Verapamil