title: The effect of Ryanodine on the force-frequency-relationship of the heart muscle.
mesh_terms: D000200:Action Potentials; D000470:Alkaloids / Q000494:pharmacology*; D000818:Animals; D002118:Calcium / Q000378:metabolism; D006168:Guinea Pigs; D009119:Muscle Contraction / Q000187:drug effects*; D010210:Papillary Muscles / Q000187:drug effects*; D012519:Sarcoplasmic Reticulum / Q000378:metabolism; D014118:Toxins, Biological / Q000494:pharmacology
chemical_list: D000470:Alkaloids; D014118:Toxins, Biological; D002118:Calcium