Fibrin Degeneration Product Concentrations (D-Dimers) in the Course of Ageing

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Abstract
D-dimers, cross-linked fibrin split products, have been found to be an indicator of thromboembolic disease and may predict, as fibrinogen or other factors of hemostasis, a higher risk of cerebro- and cardiovascular diseases. D-dimers rose with advancing age in healthy elderly subjects and reached values well above the upper limit of the normal test values. The increase is considered to be the result of several causes, i.e. higher fibrinogen concentrations in the elderly, a slower urinary excretion, more frequent fibrin generation, (occult) diseases, risk factors, inflammatory reactions and degenerative vascular damage. In the elderly, moderately elevated D-dimers are therefore an unspecific finding. The specificity of the D-dimer test for diagnosing thromboembolic diseases can be expected to be lower than in young subjects.

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