title: Electrophysiologic correlate of exit block.
mesh_terms: D000200:Action Potentials; D000818:Animals; D004071:Digitalis Glycosides; D004285:Dogs; D004558:Electric Stimulation; D004566:Electrodes; D004594:Electrophysiology; D006327:Heart Block / Q000139:chemically induced / Q000503:physiopathology*; D006329:Heart Conduction System / Q000187:drug effects / Q000502:physiology / Q000503:physiopathology*; D006339:Heart Rate; D006801:Humans; D066298:In Vitro Techniques; D010100:Oxygen; D010138:Pacemaker, Artificial / Q000009:adverse effects; D010210:Papillary Muscles / Q000502:physiology; D011188:Potassium; D013997:Time Factors
chemical_list: D004071:Digitalis Glycosides; D011188:Potassium; D010100:Oxygen