title: THE CHRONOTROPIC AND VAGAL-BLOCKING ACTIONS OF NAPHTHYLISOPROTERENOL STUDIED BY DIRECT PERFUSION OF THE SINUS NODE.
mesh_terms: D000818:Animals; D004285:Dogs; D004983:Ethanolamines; D006329:Heart Conduction System; D012106:Research; D012849:Sinoatrial Node; D013565:Sympatholytics; D014630:Vagus Nerve
chemical_list: D004983:Ethanolamines; D013565:Sympatholytics; C084832:pronethalol
keywords: DOGS; EXPERIMENTAL LAB STUDY; HEART CONDUCTION SYSTEM; SYMPATHOLYTICS; VAGUS NERVE