Perspectives on the aged myocardium.
D000375:Aging; D000818:Animals; D006321:Heart / Q000033:anatomy & histology / Q000187:drug effects / Q000502:physiology*; D006339:Heart Rate / Q000187:drug effects; D006801:Humans; D066298:In Vitro Techniques; D009200:Myocardial Contraction / Q000187:drug effects; D009206:Myocardium / Q000378:metabolism; D013268:Stimulation, Chemical; D013997:Time Factors