title: Ekg of the month: paroxysmal atrial fibrillation.
mesh_terms: D001281:Atrial Fibrillation / Q000175:diagnosis* / Q000188:drug therapy; D004562:Electrocardiography; D006801:Humans; D008297:Male; D008875:Middle Aged; D011802:Quinidine / Q000627:therapeutic use
chemical_list: D011802:Quinidine