Vagal blocking action of phentolamine and dibenzyline studies by direct perfusion of the sinus node.
D000109:Acetylcholine / Q000494:pharmacology; D000818:Animals; D001285:Atropine / Q000494:pharmacology; D003202:Computers, Analog; D004285:Dogs; D004562:Electrocardiography; D006329:Heart Conduction System / Q000187:drug effects*; D008688:Methacholine Compounds / Q000494:pharmacology; D010477:Perfusion; D010643:Phenoxybenzamine / Q000494:pharmacology*; D010646:Phentolamine / Q000494:pharmacology*; D014630:Vagus Nerve / Q000187:drug effects*
D008688:Methacholine Compounds; D010643:Phenoxybenzamine; D001285:Atropine; D000109:Acetylcholine; D010646:Phentolamine