The force-frequency relationship: a comparative study between warm- and cold-blooded animals.
D000200:Action Potentials; D000818:Animals; D001001:Anura; D001831:Body Temperature; D004558:Electric Stimulation; D004594:Electrophysiology; D006168:Guinea Pigs; D006321:Heart / Q000502:physiology; D066298:In Vitro Techniques; D008564:Membrane Potentials; D010210:Papillary Muscles / Q000502:physiology*; D014426:Turtles; D016276:Ventricular Function