title: Beta-casomorphin affects fast and slow action potentials in ventricular myocardium.
mesh_terms: D000200:Action Potentials / Q000187:drug effects; D000818:Animals; D002118:Calcium / Q000502:physiology; D004723:Endorphins / Q000494:pharmacology*; D005260:Female; D006168:Guinea Pigs; D006321:Heart / Q000187:drug effects*; D066298:In Vitro Techniques; D008297:Male; D009200:Myocardial Contraction / Q000187:drug effects; D010210:Papillary Muscles / Q000187:drug effects
chemical_list: D004723:Endorphins; C021968:beta-casomorphins; D002118:Calcium