title: Letter: Myocardial contractility and isovolumic power and rate of change of power.
mesh_terms: D000818:Animals; D002118:Calcium / Q000494:pharmacology; D004305:Dose-Response Relationship, Drug; D006334:Heart Function Tests / Q000379:methods*; D006801:Humans; D008433:Mathematics; D009200:Myocardial Contraction / Q000187:drug effects; D013816:Thermodynamics
chemical_list: D002118:Calcium