title: A comparison of alternation in myocardial action potentials and contractility.
mesh_terms: D000200:Action Potentials; D000818:Animals; D001001:Anura; D001696:Biomechanical Phenomena; D002415:Cats; D004558:Electric Stimulation; D006168:Guinea Pigs; D006321:Heart / Q000502:physiology*; D006352:Heart Ventricles; D066298:In Vitro Techniques; D008564:Membrane Potentials; D009119:Muscle Contraction; D009206:Myocardium; D010210:Papillary Muscles; D010507:Periodicity; D051381:Rats