title: Incidence of arrhythmias and ST-segment changes in elderly patients during barium enema studies.
mesh_terms: D001145:Arrhythmias, Cardiac / Q000209:etiology*; D001466:Barium Sulfate / Q000009:adverse effects*; D004562:Electrocardiography; D004733:Enema / Q000009:adverse effects*; D005934:Glucagon / Q000009:adverse effects; D006331:Heart Diseases / Q000150:complications; D006801:Humans; D007024:Hypotension, Orthostatic / Q000150:complications
chemical_list: D001466:Barium Sulfate; D005934:Glucagon