title: Blockade of nicotine induced cardiac responses by metoprolol in the in situ dog heart.
mesh_terms: D000818:Animals; D001794:Blood Pressure / Q000187:drug effects; D001949:Bretylium Compounds / Q000494:pharmacology; D002036:Bundle of His / Q000187:drug effects; D004285:Dogs; D004562:Electrocardiography; D006321:Heart / Q000187:drug effects*; D008790:Metoprolol / Q000494:pharmacology*; D009538:Nicotine / Q000037:antagonists & inhibitors*; D011412:Propanolamines / Q000494:pharmacology*
chemical_list: D001949:Bretylium Compounds; D011412:Propanolamines; D009538:Nicotine; D008790:Metoprolol