title: Abnormal automaticity in canine Purkinje fibers focally subjected to low external concentrations of calcium.
mesh_terms: D000200:Action Potentials; D000818:Animals; D001145:Arrhythmias, Cardiac / Q000209:etiology*; D002118:Calcium; D004285:Dogs; D004492:Edetic Acid; D004558:Electric Stimulation; D006329:Heart Conduction System / Q000502:physiology*; D008564:Membrane Potentials; D008839:Microelectrodes; D010210:Papillary Muscles / Q000502:physiology; D013710:Tendons
chemical_list: D004492:Edetic Acid; D002118:Calcium