title: Problems in the definition of contractility in terms of myocardial mechanics.
mesh_terms: D004548:Elasticity; D006321:Heart / Q000502:physiology*; D006801:Humans; D008954:Models, Biological; D009200:Myocardial Contraction; D010210:Papillary Muscles / Q000502:physiology*; D013314:Stress, Mechanical