title: Microelectrode study of Wenckebach periodicity in canine Purkinje fibers.
mesh_terms: D000200:Action Potentials; D000818:Animals; D004285:Dogs; D004558:Electric Stimulation; D006327:Heart Block / Q000209:etiology / Q000503:physiopathology; D006329:Heart Conduction System / Q000502:physiology* / Q000503:physiopathology; D008839:Microelectrodes; D010507:Periodicity