title: Intrinsic regulatory properties of contractility in the myocardium.
mesh_terms: D000818:Animals; D001001:Anura; D001464:Barium / Q000494:pharmacology; D002110:Caffeine / Q000494:pharmacology; D002415:Cats; D003080:Cold Temperature; D004558:Electric Stimulation; D006321:Heart / Q000033:anatomy & histology; D066298:In Vitro Techniques; D008297:Male; D009200:Myocardial Contraction / Q000187:drug effects; D011188:Potassium / Q000494:pharmacology; D011817:Rabbits; D011892:Rana catesbeiana; D011894:Rana pipiens; D051381:Rats; D012964:Sodium / Q000494:pharmacology; D013997:Time Factors
chemical_list: D001464:Barium; D002110:Caffeine; D012964:Sodium; D011188:Potassium