Ability of epinephrine, but not increased extracellular calcium, to reverse the effects of verapamil on ventricular automaticity in vitro.
D000200:Action Potentials / Q000187:drug effects; D000818:Animals; D002118:Calcium / Q000494:pharmacology*; D004837:Epinephrine / Q000494:pharmacology*; D006168:Guinea Pigs; D006339:Heart Rate / Q000187:drug effects*; D006352:Heart Ventricles / Q000187:drug effects; D066298:In Vitro Techniques; D008564:Membrane Potentials / Q000187:drug effects; D010210:Papillary Muscles / Q000187:drug effects; D014700:Verapamil / Q000037:antagonists & inhibitors*
D014700:Verapamil; D002118:Calcium; D004837:Epinephrine