Mechanism of the Woodworth staircase phenomenon in heart and skeletal muscle.
D000470:Alkaloids / Q000494:pharmacology; D000818:Animals; D001001:Anura; D002118:Calcium / Q000378:metabolism / Q000494:pharmacology; D003964:Diaphragm; D006168:Guinea Pigs; D006321:Heart / Q000502:physiology*; D066298:In Vitro Techniques; D008722:Methods; D009119:Muscle Contraction / Q000187:drug effects; D009132:Muscles / Q000502:physiology*; D009206:Myocardium; D051381:Rats
D000470:Alkaloids; D002118:Calcium