title: Overdrive suppression of atrial pacemaker tissues in the alert, awake dog before and chronically after excision of the sinoatrial node.
mesh_terms: D000818:Animals; D001285:Atropine / Q000494:pharmacology; D001341:Autonomic Nervous System / Q000502:physiology; D002304:Cardiac Pacing, Artificial; D003243:Consciousness; D004285:Dogs; D005260:Female; D006325:Heart Atria / Q000294:innervation; D006339:Heart Rate / Q000187:drug effects; D008297:Male; D011433:Propranolol / Q000494:pharmacology; D011930:Reaction Time; D012849:Sinoatrial Node / Q000502:physiology*; D009435:Synaptic Transmission
chemical_list: D001285:Atropine; D011433:Propranolol