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The Journal of Thoracic and Cardiovascular Surgery, Vol 72, 413-417, Copyright © 1976 by The American Association for Thoracic Surgery and The Western Thoracic Surgical Association
LR Sauvage, R Schloemer, SJ Wood and G Logan
By attaching appropriate measuring devices to the wall of an intact aortic
root at the level of leaflet coaptation, we have measured a 16 per cent
diameter change during each cardiac cycle. The dimensional changes observed
can by themselves explain aortic valve function and obviate the postulation
that the leaflets shorten and lengthen during each cardiac cycle. The
tissue composition of the aortic root and leaflets is more compatible with
this theory than with other postulations. Such a dynamic aortic root may
explain the longevity of the actual aortic leaflets, in that leaflet
fatigue stress is minimized by changes in aortic root dimension.
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The dynamic aortic root. Its role in aortic valve function
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