1. Modeling leaflet correction techniques in aortic valve repair: A finite element study 
Michel R. Labrosse, Munir Boodhwani, Benjamin Sohmer, Carsten J. Beller 
Journal of Biomechanics 
Volume 44, Issue 12, Pages (August 2011)
DOI: /j.jbiomech
Copyright © 2011 Elsevier Ltd Terms and Conditions

2. Fig. 1
(a) Line sketch of unpressurized aortic valve model, showing the left ventricular outflow tract, the aortic sinuses and the ascending aorta, including the 15 landmark points described in Appendix 1. (b) Line sketch of the aortic leaflets drawn in an assumed, unpressurized position. (c) Final finite element mesh of the aortic valve and root. Green: ascending aorta and aortic sinuses; blue: leaflets; red: base of the valve, including the left ventricular outflow tract.
Journal of Biomechanics  , DOI: ( /j.jbiomech )
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3. Fig. 2
Surgical correction of the aortic leaflet free margin. (a) Leaflet resuspension technique. A continuous suture (in red) runs the entire length of the free margin and is then tightened to evenly shorten it. (b) Central plication technique. Stitches (in red) are placed in the central region of the free margin and down the height of the leaflet. (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.)
Journal of Biomechanics  , DOI: ( /j.jbiomech )
Copyright © 2011 Elsevier Ltd Terms and Conditions

4. Fig. 3
Control model in dynamics, under physiologic longitudinal stretch ratio of The valve model was studied over one cardiac cycle by application of the pressure pulses described in the upper left inset. The analysis started from the unpressurized geometry at time 0. The pressure was ramped from 0 up to 80mmHg at time 1 before the cardiac cycle started in early systole. The valve was fully open at time 2, was closing at time 3 and was closed under maximum pressure at time 4. Von Mises stresses are color coded in MPa. The highest stresses were reached at the commissures of the leaflets.
Journal of Biomechanics  , DOI: ( /j.jbiomech )
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5. Fig. 4
(a) Model with prolapse of the right leaflet in diastole (at time 4 in Fig. 3), under a longitudinal stretch ratio of (b) The model was rotated to show the central hole during diastole (aortic insufficiency). Von Mises stress values are color coded in MPa. (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.)
Journal of Biomechanics  , DOI: ( /j.jbiomech )
Copyright © 2011 Elsevier Ltd Terms and Conditions

6. Fig. 5
Models of the same aortic valve as in Fig. 4, repaired with 4 different leaflet correction techniques, and 2-mm free-edge reduction: (a) one-row leaflet resuspension, (b) two-row leaflet resuspension, (c) central plication, and (d) commissural plication. The models are shown in diastole (i.e. time 4 in Fig. 3). The repaired leaflets are to the left of the models in the side views, and to the bottom left in the top views. In (b), leaflet restriction is clearly visible; in (c) and (d) leaflet prolapse is clearly visible. Von Mises stress values are color coded in MPa. The maximum stress values, reported in Table 3, are reached along the commissural attachments of the leaflets. (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.)
Journal of Biomechanics  , DOI: ( /j.jbiomech )
Copyright © 2011 Elsevier Ltd Terms and Conditions