title: Tris buffer: a new method for studying pulsus alternans in isolated heart muscle.
mesh_terms: D000818:Animals; D002118:Calcium / Q000494:pharmacology; D009202:Cardiomyopathies / Q000139:chemically induced* / Q000503:physiopathology; D002415:Cats; D006168:Guinea Pigs; D008297:Male; D008345:Manganese / Q000494:pharmacology; D009200:Myocardial Contraction / Q000187:drug effects*; D014325:Tromethamine / Q000494:pharmacology*
chemical_list: D014325:Tromethamine; D008345:Manganese; D002118:Calcium