title: Dual effect of low-K Ringer on the contractility of bullfrog ventricle.
mesh_terms: D000818:Animals; D001001:Anura; D002118:Calcium / Q000494:pharmacology; D006352:Heart Ventricles / Q000187:drug effects*; D066298:In Vitro Techniques; D007477:Ions; D008564:Membrane Potentials / Q000187:drug effects; D011188:Potassium / Q000494:pharmacology*; D011892:Rana catesbeiana; D012964:Sodium / Q000494:pharmacology; D013997:Time Factors
chemical_list: D007477:Ions; D012964:Sodium; D011188:Potassium; D002118:Calcium