title: Calcium efflux and spontaneous activity of frog sinus venosus and isotonic sucrose solution.
mesh_terms: D000818:Animals; D002118:Calcium / Q000378:metabolism*; D006321:Heart / Q000502:physiology*; D066298:In Vitro Techniques; D009200:Myocardial Contraction; D011898:Ranidae; D012996:Solutions; D013395:Sucrose
chemical_list: D012996:Solutions; D013395:Sucrose; D002118:Calcium