title: Slow responses of frog myocardial fibres in sodium-free medium containing divalent cations.
mesh_terms: D000200:Action Potentials; D000818:Animals; D001464:Barium / Q000378:metabolism; D002118:Calcium / Q000378:metabolism; D004305:Dose-Response Relationship, Drug; D007473:Ion Channels / Q000378:metabolism*; D008274:Magnesium / Q000378:metabolism; D009200:Myocardial Contraction; D011895:Rana ridibunda; D012964:Sodium / Q000378:metabolism*; D013324:Strontium / Q000378:metabolism; D013997:Time Factors
chemical_list: D007473:Ion Channels; D001464:Barium; D012964:Sodium; D008274:Magnesium; D002118:Calcium; D013324:Strontium