title: Ca-action potentials and contractions of heart muscle in Na-free solutions. Influence of caffeine.
mesh_terms: D000200:Action Potentials; D000818:Animals; D002110:Caffeine / Q000494:pharmacology*; D002118:Calcium / Q000378:metabolism; D002417:Cattle; D002463:Cell Membrane Permeability / Q000187:drug effects; D003593:Cytoplasm / Q000378:metabolism; D006321:Heart / Q000187:drug effects / Q000502:physiology*; D009119:Muscle Contraction; D012964:Sodium; D016276:Ventricular Function
chemical_list: D002110:Caffeine; D012964:Sodium; D002118:Calcium