title: Supernormal conduction and atrial echo beats in the dog.
mesh_terms: D000200:Action Potentials; D000818:Animals; D016275:Atrial Function; D001285:Atropine / Q000494:pharmacology; D004206:Disopyramide; D004285:Dogs; D004558:Electric Stimulation; D006329:Heart Conduction System / Q000187:drug effects / Q000502:physiology*; D012032:Refractory Period, Electrophysiological; D013563:Sympathectomy, Chemical; D013997:Time Factors
chemical_list: D001285:Atropine; D004206:Disopyramide