title: Frequency dependence of cyclic AMP in mammalian myocardium.
mesh_terms: D000818:Animals; D002118:Calcium / Q000494:pharmacology; D000242:Cyclic AMP / Q000378:metabolism*; D004558:Electric Stimulation; D005260:Female; D005711:Gallopamil / Q000494:pharmacology; D066298:In Vitro Techniques; D008297:Male; D009200:Myocardial Contraction / Q000187:drug effects; D009206:Myocardium / Q000378:metabolism*; D010210:Papillary Muscles; D011817:Rabbits
chemical_list: D005711:Gallopamil; D000242:Cyclic AMP; D002118:Calcium