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1 Department of Pharmacology, University of Michigan, Ann Arbor, Michigan
2 The Dow Chemical Company, Midland, Michigan
1. The ethylenediamine content of Aminophylline contributes significantly to the duration of action of this drug as tested in the failed dog heart-lung preparation.
2. Ethylenediamine exerts a marked positive inotropic action and differs from theophylline in lacking a corresponding positive chronotropic action as tested in the failed dog heart-lung preparation.
Submitted on August 14, 1953