pH limits of contractility in isolated turtle heart.
D000818:Animals; D004558:Electric Stimulation; D005110:Extracellular Space; D006321:Heart / Q000502:physiology*; D006352:Heart Ventricles; D006863:Hydrogen-Ion Concentration; D066298:In Vitro Techniques; D010477:Perfusion; D012621:Seasons; D014426:Turtles