title: Influence of papaverine and isoprenaline on contractility and cyclic AMP level of left guinea-pig atria at different rates of beat.
mesh_terms: D000818:Animals; D016275:Atrial Function; D000242:Cyclic AMP / Q000378:metabolism*; D006168:Guinea Pigs; D006339:Heart Rate / Q000187:drug effects; D006352:Heart Ventricles / Q000378:metabolism; D007545:Isoproterenol / Q000494:pharmacology*; D009200:Myocardial Contraction / Q000187:drug effects*; D009206:Myocardium / Q000378:metabolism*; D010208:Papaverine / Q000494:pharmacology*
chemical_list: D010208:Papaverine; D000242:Cyclic AMP; D007545:Isoproterenol