title: The isolated and cross-circulated AV node preparation of the dog.
mesh_terms: D000109:Acetylcholine / Q000494:pharmacology; D000818:Animals; D003864:Depression, Chemical; D004285:Dogs; D004566:Electrodes; D004594:Electrophysiology; D006329:Heart Conduction System / Q000187:drug effects / Q000502:physiology; D066298:In Vitro Techniques; D008722:Methods; D009638:Norepinephrine / Q000494:pharmacology; D013268:Stimulation, Chemical
chemical_list: D000109:Acetylcholine; D009638:Norepinephrine