title: Age-associated alterations in myocardial contractile properties.
mesh_terms: D000251:Adenosine Triphosphatases / Q000378:metabolism; D000367:Age Factors; D000818:Animals; D001696:Biomechanical Phenomena; D011232:Chemical Precipitation; D006352:Heart Ventricles; D066298:In Vitro Techniques; D008297:Male; D009119:Muscle Contraction; D009206:Myocardium / Q000201:enzymology; D009218:Myosins / Q000378:metabolism; D010210:Papillary Muscles; D051381:Rats
chemical_list: D000251:Adenosine Triphosphatases; D009218:Myosins