Runaway pacemaker with demonstration of supernormal period of excitation.
D000328:Adult; D004562:Electrocardiography; D005260:Female; D006327:Heart Block / Q000151:congenital / Q000628:therapy; D006801:Humans; D008991:Monitoring, Physiologic; D010138:Pacemaker, Artificial / Q000009:adverse effects*; D013686:Telemetry