title: Active transport and inotropic state in guinea pig left atrium.
mesh_terms: D000818:Animals; D006168:Guinea Pigs; D009200:Myocardial Contraction; D009206:Myocardium / Q000378:metabolism*; D011188:Potassium / Q000378:metabolism*; D012964:Sodium / Q000378:metabolism*
chemical_list: D012964:Sodium; D011188:Potassium