Retrograde conduction in auriculo-ventricular block.
D000200:Action Potentials; D001145:Arrhythmias, Cardiac / Q000503:physiopathology; D004562:Electrocardiography; D005071:Evoked Potentials; D006327:Heart Block / Q000503:physiopathology*; D006801:Humans; D010138:Pacemaker, Artificial