title: Analysis of a rapid twitch facilitation in the frog heart.
mesh_terms: D000200:Action Potentials; D000818:Animals; D002118:Calcium / Q000378:metabolism; D006325:Heart Atria; D066298:In Vitro Techniques; D009200:Myocardial Contraction; D011188:Potassium / Q000378:metabolism; D011896:Rana temporaria
chemical_list: D011188:Potassium; D002118:Calcium