Different phases of potassium contracture.
D000818:Animals; D002110:Caffeine / Q000494:pharmacology; D004837:Epinephrine / Q000494:pharmacology; D006168:Guinea Pigs; D006321:Heart / Q000187:drug effects*; D007811:Lanthanum / Q000494:pharmacology; D009119:Muscle Contraction / Q000187:drug effects; D009206:Myocardium / Q000378:metabolism*; D010210:Papillary Muscles / Q000187:drug effects / Q000502:physiology; D011188:Potassium / Q000494:pharmacology*; D012964:Sodium / Q000494:pharmacology
D002110:Caffeine; D007811:Lanthanum; D012964:Sodium; D011188:Potassium; D004837:Epinephrine