Recent developments in cardiac pacing.
D000368:Aged; D001145:Arrhythmias, Cardiac / Q000628:therapy*; D001674:Bioelectric Energy Sources; D004562:Electrocardiography; D004567:Electrodes, Implanted / Q000706:statistics & numerical data; D006339:Heart Rate; D006801:Humans; D008136:Longevity; D008875:Middle Aged; D010138:Pacemaker, Artificial / Q000295:instrumentation