title: [Sodium and calcium ions and frequency-dependent contractile phenomena in fish myocardium].
mesh_terms: D000818:Animals; D002118:Calcium / Q000494:pharmacology*; D004305:Dose-Response Relationship, Drug; D005399:Fishes; D006321:Heart / Q000187:drug effects; D008564:Membrane Potentials / Q000187:drug effects; D009200:Myocardial Contraction / Q000187:drug effects*; D012964:Sodium / Q000494:pharmacology*
chemical_list: D012964:Sodium; D002118:Calcium
vernacular_title: Iony natriia i kal'tsiia i chastotnozavisimye sokratitel'nye fenomeny v miokarde ryby