title: Position of the H-spike in selective pharmacologic production of A-V block or A-V junctional rhythm.
mesh_terms: D000109:Acetylcholine / Q000008:administration & dosage; D000818:Animals; D001285:Atropine / Q000008:administration & dosage; D002037:Bundle-Branch Block / Q000139:chemically induced / Q000503:physiopathology; D003331:Coronary Vessels; D004285:Dogs; D004558:Electric Stimulation; D004562:Electrocardiography; D006327:Heart Block / Q000139:chemically induced* / Q000503:physiopathology; D006329:Heart Conduction System / Q000187:drug effects / Q000503:physiopathology*; D007269:Injections, Intra-Arterial; D007545:Isoproterenol / Q000008:administration & dosage / Q000494:pharmacology; D008012:Lidocaine / Q000008:administration & dosage; D009638:Norepinephrine / Q000008:administration & dosage / Q000494:pharmacology; D014439:Tyramine / Q000008:administration & dosage / Q000494:pharmacology; D014630:Vagus Nerve / Q000502:physiology
chemical_list: D001285:Atropine; D008012:Lidocaine; D007545:Isoproterenol; D000109:Acetylcholine; D009638:Norepinephrine; D014439:Tyramine