Induction of slow action potentials by microiontophoresis of cyclic AMP into heart cells.
D000200:Action Potentials / Q000187:drug effects; D000818:Animals; D000242:Cyclic AMP / Q000494:pharmacology*; D004285:Dogs; D004305:Dose-Response Relationship, Drug; D006168:Guinea Pigs; D006321:Heart / Q000502:physiology*; D006352:Heart Ventricles; D007478:Iontophoresis; D010210:Papillary Muscles / Q000502:physiology; D011188:Potassium / Q000494:pharmacology; D011690:Purkinje Fibers / Q000502:physiology; D013806:Theophylline / Q000494:pharmacology
D013806:Theophylline; D000242:Cyclic AMP; D011188:Potassium