title: Isometric contractions in cardiac Purkynĕ fibres: characteristics in Na free Sr Tyrode.
mesh_terms: D000200:Action Potentials; D000818:Animals; D002118:Calcium / Q000494:pharmacology; D002417:Cattle; D004594:Electrophysiology; D006329:Heart Conduction System / Q000187:drug effects / Q000502:physiology*; D066298:In Vitro Techniques; D009119:Muscle Contraction / Q000187:drug effects*; D012964:Sodium / Q000494:pharmacology; D013324:Strontium / Q000378:metabolism / Q000494:pharmacology*; D013997:Time Factors
chemical_list: D012964:Sodium; D002118:Calcium; D013324:Strontium