title: Factors affecting pulsus alternans in the rapidly driven heart and papillary muscle.
mesh_terms: D000818:Animals; D002118:Calcium / Q000494:pharmacology; D002415:Cats; D004285:Dogs; D004492:Edetic Acid / Q000494:pharmacology; D004837:Epinephrine / Q000494:pharmacology; D006321:Heart / Q000187:drug effects / Q000502:physiology*; D006339:Heart Rate; D066298:In Vitro Techniques; D010042:Ouabain / Q000494:pharmacology; D010210:Papillary Muscles / Q000502:physiology*; D011188:Potassium / Q000494:pharmacology; D011433:Propranolol / Q000494:pharmacology; D011674:Pulse / Q000187:drug effects / Q000502:physiology*; D011802:Quinidine / Q000494:pharmacology
chemical_list: D010042:Ouabain; D004492:Edetic Acid; D011433:Propranolol; D011802:Quinidine; D011188:Potassium; D002118:Calcium; D004837:Epinephrine