title: Demonstration of the supernormal period in the intact human heart as a result of pacemaker failure.
mesh_terms: D001282:Atrial Flutter / Q000503:physiopathology / Q000628:therapy*; D004562:Electrocardiography; D005071:Evoked Potentials; D006321:Heart / Q000503:physiopathology; D006327:Heart Block / Q000503:physiopathology / Q000628:therapy*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010138:Pacemaker, Artificial / Q000009:adverse effects*; D013997:Time Factors