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Research on Aging
Structure of the Aging Heart
8 other sections not shown
action activity adult age changes age-associated alterations animals aorta aortic appear arteries associated blood cardiac cardiovascular catecholamines cell Circulation collagen compared concentration contractile contraction coronary arteries cycle decrease dehydrogenase demonstrated dependent determined diastolic differences digitalis direct discussed disease drugs duration effect of age elastic elastin elderly enzyme evidence exercise extensibility factors findings flow function glucose greater heart rate human impedance important increase increasing age indicate individuals influence isolated left ventricular less limited load major maximal mean measured mechanical membrane mitochondria mitral valve months muscle myocardial myocardial infarction myocardium normal observed occur older oxidation patients performance Physiol potential present pressure properties pulmonary ratio rats relationship relative relaxation reported response result senescent showed shown significant similar smooth specific stiffness stress structure studies subjects suggested tion tissue vascular ventricle vessel volume wall young