title: [Mechanism of the positive ionotropic action of theophylline on the mamalian heart. I. Influence of extracellular Ca, Na and K concentrations and of reserpine].
mesh_terms: D000818:Animals; D001696:Biomechanical Phenomena; D002118:Calcium / Q000494:pharmacology; D004347:Drug Interactions; D004837:Epinephrine / Q000494:pharmacology; D005110:Extracellular Space; D005260:Female; D006168:Guinea Pigs; D006321:Heart / Q000187:drug effects*; D008297:Male; D011188:Potassium / Q000494:pharmacology; D012110:Reserpine / Q000494:pharmacology; D012964:Sodium / Q000494:pharmacology; D013806:Theophylline / Q000008:administration & dosage / Q000494:pharmacology*
chemical_list: D012110:Reserpine; D012964:Sodium; D013806:Theophylline; D011188:Potassium; D002118:Calcium; D004837:Epinephrine
vernacular_title: Uber den mechanismus der positiv inotropen Wirkung von Theophyllin am Warmblüterherzen. I. Einfluss der extracellulären Ca-, Na- und K-Konzentration und von Reserpin.