title: Mechanisms of contraction of the normal and failing heart.
mesh_terms: D000818:Animals; D001001:Anura; D002415:Cats; D004547:Elastic Tissue / Q000502:physiology; D006321:Heart / Q000502:physiology*; D006331:Heart Diseases / Q000503:physiopathology*; D006736:Horses; D008962:Models, Theoretical; D009119:Muscle Contraction / Q000502:physiology; D009210:Myofibrils / Q000502:physiology; D010210:Papillary Muscles / Q000502:physiology