Rhythm anomalies in contemporary demand pacing.
D001145:Arrhythmias, Cardiac / Q000175:diagnosis* / Q000209:etiology; D004562:Electrocardiography; D004566:Electrodes; D006339:Heart Rate; D006801:Humans; D008722:Methods; D010138:Pacemaker, Artificial / Q000009:adverse effects; D011674:Pulse