title: Levels of concealment in second degree and advanced second degree A-V block.
mesh_terms: D000818:Animals; D001145:Arrhythmias, Cardiac / Q000209:etiology; D004562:Electrocardiography; D006327:Heart Block / Q000209:etiology / Q000503:physiopathology*; D006329:Heart Conduction System / Q000503:physiopathology; D006352:Heart Ventricles / Q000503:physiopathology; D008564:Membrane Potentials; D011817:Rabbits