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Progressive mismatch at the human abdominal aortic junction with age may increase wave reflection; leaves open its hemodynamic role in adults.
In this investigation the area ratio of the abdominal aortic junction in three species—chicken, dog and man—is measured and compared with the area ratio which theoretically gives minimum reflection of the pressure pulse at this junction. It is shown that in the cockerel and the dog the abdominal aortic junction has an area ratio close to the theoretically expected value. In man, however, it is found that this is true only in infancy and that the junction becomes progressively “mismatched” with age.
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Gosling et al. (1971) studied this question.
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