title: Differential effects of clonidine on guinea-pig atrial and papillary muscles.
mesh_terms: D000109:Acetylcholine / Q000494:pharmacology; D000200:Action Potentials / Q000187:drug effects; D000818:Animals; D000959:Antihypertensive Agents / Q000494:pharmacology*; D016275:Atrial Function; D003000:Clonidine / Q000037:antagonists & inhibitors / Q000494:pharmacology; D004336:Drug Antagonism; D006168:Guinea Pigs; D006321:Heart / Q000187:drug effects*; D006325:Heart Atria / Q000187:drug effects; D007093:Imidazoles / Q000494:pharmacology*; D066298:In Vitro Techniques; D009638:Norepinephrine; D010210:Papillary Muscles / Q000187:drug effects* / Q000502:physiology; D013268:Stimulation, Chemical; D016276:Ventricular Function
chemical_list: D000959:Antihypertensive Agents; D007093:Imidazoles; D003000:Clonidine; D000109:Acetylcholine; D009638:Norepinephrine