title: EKG of the month. Atrial flutter with 2:1 ventricular response.
mesh_terms: D000368:Aged; D001282:Atrial Flutter / Q000175:diagnosis* / Q000188:drug therapy; D004070:Digitalis; D004562:Electrocardiography; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000150:complications; D008297:Male; D010946:Plants, Medicinal; D010947:Plants, Toxic; D011802:Quinidine / Q000627:therapeutic use
chemical_list: D011802:Quinidine