title: Effects of vagal stimulation on S-A and A-V nodes.
mesh_terms: D000109:Acetylcholine / Q000502:physiology; D000818:Animals; D001146:Arrhythmia, Sinus; D004285:Dogs; D004562:Electrocardiography; D005260:Female; D006327:Heart Block; D006329:Heart Conduction System / Q000502:physiology*; D006339:Heart Rate; D008297:Male; D009638:Norepinephrine / Q000502:physiology; D012849:Sinoatrial Node / Q000502:physiology; D009435:Synaptic Transmission; D014630:Vagus Nerve / Q000502:physiology*
chemical_list: D000109:Acetylcholine; D009638:Norepinephrine