title: Are increases in cyclic GMP levels responsible for the negative inotropic effects of acetylcholine in the heart?
mesh_terms: D000109:Acetylcholine / Q000494:pharmacology*; D000818:Animals; D016275:Atrial Function; D002415:Cats; D000242:Cyclic AMP / Q000502:physiology; D006152:Cyclic GMP / Q000502:physiology*; D005260:Female; D006325:Heart Atria / Q000187:drug effects; D008297:Male; D009200:Myocardial Contraction / Q000187:drug effects*; D009206:Myocardium / Q000378:metabolism*; D009599:Nitroprusside / Q000494:pharmacology
chemical_list: D009599:Nitroprusside; D000242:Cyclic AMP; D006152:Cyclic GMP; D000109:Acetylcholine