Preventive pacemaking.
D001145:Arrhythmias, Cardiac / Q000150:complications / Q000401:mortality; D002037:Bundle-Branch Block / Q000150:complications; D003645:Death, Sudden / Q000453:epidemiology; D004562:Electrocardiography; D006327:Heart Block / Q000401:mortality / Q000517:prevention & control*; D006801:Humans; D010138:Pacemaker, Artificial; D012306:Risk; D013575:Syncope / Q000150:complications