title: Sympathetic-parasympathetic interactions in the heart.
mesh_terms: D000818:Animals; D001337:Autonomic Agents / Q000494:pharmacology; D002415:Cats; D004285:Dogs; D006168:Guinea Pigs; D006321:Heart / Q000502:physiology*; D006329:Heart Conduction System / Q000033:anatomy & histology / Q000187:drug effects / Q000502:physiology*; D006801:Humans; D011817:Rabbits; D051381:Rats; D013564:Sympathetic Nervous System / Q000033:anatomy & histology / Q000502:physiology*; D009435:Synaptic Transmission; D014630:Vagus Nerve / Q000033:anatomy & histology / Q000502:physiology*
chemical_list: D001337:Autonomic Agents