title: Direct effect of drugs on intact sino-auricular node of dog.
mesh_terms: D000109:Acetylcholine / Q000494:pharmacology; D000818:Animals; D002395:Catecholamines / Q000494:pharmacology; D004077:Digoxin / Q000494:pharmacology; D004285:Dogs; D005260:Female; D006339:Heart Rate / Q000187:drug effects; D008297:Male; D012849:Sinoatrial Node / Q000187:drug effects*
chemical_list: D002395:Catecholamines; D004077:Digoxin; D000109:Acetylcholine