title: New cardiotonic agents: a search for digitalis substitute.
mesh_terms: D015082:2,2'-Dipyridyl / Q000031:analogs & derivatives / Q000494:pharmacology*; D000818:Animals; D002227:Carbazoles / Q000494:pharmacology*; D004285:Dogs; D006168:Guinea Pigs; D006333:Heart Failure / Q000188:drug therapy; D006439:Hemodynamics / Q000187:drug effects; D066298:In Vitro Techniques; D009200:Myocardial Contraction / Q000187:drug effects; D010210:Papillary Muscles / Q000187:drug effects; D011725:Pyridines / Q000494:pharmacology*; D013268:Stimulation, Chemical; D013997:Time Factors
chemical_list: D002227:Carbazoles; D011725:Pyridines; D015082:2,2'-Dipyridyl