title: EKG of the month.
mesh_terms: D000368:Aged; D004562:Electrocardiography; D005260:Female; D006801:Humans; D008945:Mitral Valve Prolapse / Q000188:drug therapy / Q000503:physiopathology*; D011802:Quinidine / Q000627:therapeutic use
chemical_list: D011802:Quinidine