PMID: 9450254Feb 5, 1998Paper

Assessment of the influence of the compliant aortic root on aortic valve mechanics by means of a geometrical model

Medical Engineering & Physics
Alberto RedaelliR Fumero

Abstract

In recent years several researchers have suggested that the changes in the geometry and angular dimensions of the aortic root which occur during the cardiac cycle are functional to the optimisation of aortic valve function, both in terms of diminishing leaflet stresses and of fluid-dynamic behaviour. The paper presents an analytical parametric model of the aortic valve which includes the aortic root movement. The indexes used to evaluate the valve behaviour are the circumferential membrane stress and the stress at the free edge of the leaflet, the index of bending strain, the bending of the leaflet at the line attachment in the radial and circumferential directions and the shape of the conduit formed by the leaflets during systole. In order to evaluate the role of geometric changes in valve performance, two control cases were considered, with different reference geometric configuration, where the movement of the aortic root was ignored. The results obtained appear consistent with physiological data, especially with regard to the late diastolic phase and the early ejection phase, and put in evidence the role of the aortic root movement in the improvement of valve behaviour.

References

Jan 1, 1991·Journal of Biomechanics·D Mavrilas, Y Missirlis
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Sep 1, 1989·The Annals of Thoracic Surgery·D Ross
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Jul 1, 1993·The Annals of Thoracic Surgery·K J LockieG A Davies

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Citations

Nov 3, 2001·International Journal of Cardiology·M CotrufoL Agozzino
Jul 26, 2006·Heart and Vessels·Lucio AgozzinoSalvatore Esposito
Apr 5, 2002·European Journal of Cardio-thoracic Surgery : Official Journal of the European Association for Cardio-thoracic Surgery·L AgozzinoM Cotrufo

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