title: [Decline of sympathetic nervous system regulation as etiological factor in sinoatrial block model].
mesh_terms: D000200:Action Potentials; D000818:Animals; D002395:Catecholamines / Q000378:metabolism; D006327:Heart Block / Q000209:etiology*; D066298:In Vitro Techniques; D011817:Rabbits; D012848:Sinoatrial Block / Q000209:etiology*; D012849:Sinoatrial Node / Q000378:metabolism / Q000503:physiopathology*; D013564:Sympathetic Nervous System / Q000503:physiopathology*
chemical_list: D002395:Catecholamines