title: Spontaneous mechanical activity in depolarized frog ventricle.
mesh_terms: D000818:Animals; D001001:Anura; D002118:Calcium / Q000502:physiology; D006321:Heart / Q000502:physiology*; D066298:In Vitro Techniques; D008094:Lithium / Q000502:physiology; D008564:Membrane Potentials; D009119:Muscle Contraction; D011188:Potassium / Q000502:physiology; D012519:Sarcoplasmic Reticulum / Q000502:physiology; D012964:Sodium / Q000502:physiology; D013997:Time Factors; D016276:Ventricular Function
chemical_list: D008094:Lithium; D012964:Sodium; D011188:Potassium; D002118:Calcium