title: Staircase response in guinea-pig atrial muscle [proceedings].
mesh_terms: D000200:Action Potentials; D000818:Animals; D016275:Atrial Function; D002118:Calcium / Q000502:physiology; D006168:Guinea Pigs; D066298:In Vitro Techniques; D009200:Myocardial Contraction
chemical_list: D002118:Calcium