Time and displacement dependence of cardiac contractility: problems in defining the active state and force-velocity relations.
D000818:Animals; D055592:Biophysical Phenomena; D001703:Biophysics; D006321:Heart / Q000502:physiology*; D066298:In Vitro Techniques; D009119:Muscle Contraction; D010210:Papillary Muscles / Q000502:physiology*; D011817:Rabbits