title: Preoperative evaluation of patients with electrocardiographic conduction defects.
abstract: Prophylactic pacemakers should be recommended for all preoperative patients with second- and third-degree heart block, regardless of whether the block is in the AV node or the trifascicular conduction system. Symptomatic patients with potential for trifascicular block should also have a transvenous pacemaker. Those without symptoms should be monitored during anesthesia and the postoperative recovery period.
mesh_terms: D001145:Arrhythmias, Cardiac / Q000175:diagnosis*; D002037:Bundle-Branch Block / Q000503:physiopathology; D004562:Electrocardiography; D006327:Heart Block / Q000503:physiopathology; D006329:Heart Conduction System / Q000503:physiopathology*; D006352:Heart Ventricles / Q000503:physiopathology; D006801:Humans; D010138:Pacemaker, Artificial / Q000379:methods; D011300:Preoperative Care / Q000379:methods*; D012804:Sick Sinus Syndrome / Q000503:physiopathology