title: Effect of manganese on the AV node of dog in situ.
mesh_terms: D000818:Animals; D004285:Dogs; D006327:Heart Block / Q000139:chemically induced; D006329:Heart Conduction System / Q000187:drug effects*; D008345:Manganese / Q000008:administration & dosage / Q000494:pharmacology*; D009638:Norepinephrine / Q000037:antagonists & inhibitors; D013610:Tachycardia / Q000139:chemically induced
chemical_list: D008345:Manganese; D009638:Norepinephrine