title: Pacemaker oversensing: a possible example of concealed ventricular extrasystoles.
mesh_terms: D000368:Aged; D005117:Cardiac Complexes, Premature / Q000175:diagnosis / Q000188:drug therapy / Q000503:physiopathology*; D002304:Cardiac Pacing, Artificial / Q000009:adverse effects*; D004562:Electrocardiography; D006801:Humans; D008297:Male; D011802:Quinidine / Q000627:therapeutic use
chemical_list: D011802:Quinidine