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Computational modeling of blood flow in the aorta—insights into eccentric dilatation of the ascending aorta after surgery for coarctation  Marcela Szopos,

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Presentation on theme: "Computational modeling of blood flow in the aorta—insights into eccentric dilatation of the ascending aorta after surgery for coarctation  Marcela Szopos,"— Presentation transcript:

1 Computational modeling of blood flow in the aorta—insights into eccentric dilatation of the ascending aorta after surgery for coarctation  Marcela Szopos, PhD, Nicole Poussineau, PhD, Yvon Maday, PhD, Carla Canniffe, MD, David S. Celermajer, MBBS, PhD, FRACP, Damien Bonnet, MD, PhD, Phalla Ou, MD, PhD  The Journal of Thoracic and Cardiovascular Surgery  Volume 148, Issue 4, Pages (October 2014) DOI: /j.jtcvs Copyright © 2014 The American Association for Thoracic Surgery Terms and Conditions

2 Figure 1 Postgadolinium magnetic resonance imaging 3-dimensional angiogram of the normal arch after coarctation repair. A, Cross-section measurements of the ascending aorta at the level of the pulmonary bifurcation (through line 1). Left, measurements of the 2 diameters (ie, anteroposterior diameter and left to right diameter) of the ascending aorta. Right, measurements of the corresponding area. B, Cross-section measurements of the horizontal aorta (through line 2). Left, Measurements of the 2 diameters (ie, superoinferior diameter and left to right diameter) of the horizontal aorta. Right, Measurements of the corresponding area. The Journal of Thoracic and Cardiovascular Surgery  , DOI: ( /j.jtcvs ) Copyright © 2014 The American Association for Thoracic Surgery Terms and Conditions

3 Figure 2 Postgadolinium magnetic resonance imaging 3-dimensional angiogram of the gothic arch after coarctation repair. A, Cross-section measurements of the ascending aorta at the level of the pulmonary bifurcation (through line 1). Left, Measurements of the 2 diameters (ie, anteroposterior diameter and left–right diameter) of the ascending aorta. Right, Measurements of the corresponding area. B, Cross-section measurements of the horizontal aorta (through line 2). Left, Measurements of the 2 diameters (ie, superoinferior diameter and left- to right diameter) of the horizontal aorta. Right, Measurements of the corresponding area. The Journal of Thoracic and Cardiovascular Surgery  , DOI: ( /j.jtcvs ) Copyright © 2014 The American Association for Thoracic Surgery Terms and Conditions

4 Figure 3 Aortic arch geometries showing 2 idealized geometries, corresponding to 2 extreme morphologies of the aortic arch after coarctation repair. Left, Normal arch. Right, Gothic arch. The Journal of Thoracic and Cardiovascular Surgery  , DOI: ( /j.jtcvs ) Copyright © 2014 The American Association for Thoracic Surgery Terms and Conditions

5 Figure 4 Graph showing flow rate calculation plotted against time in the ascending aorta (red line) and descending aorta (green line). Note the reverse flow in the gothic arch in late systole (black arrow). The Journal of Thoracic and Cardiovascular Surgery  , DOI: ( /j.jtcvs ) Copyright © 2014 The American Association for Thoracic Surgery Terms and Conditions

6 Figure 5 A and C, Velocity field, and (B and D) streamlines determined at the instant time ≈ second. A and B, Normal arch; C and D, gothic arch. Note the recirculation zones in the ascending aorta in the gothic arch (D, black arrows). The Journal of Thoracic and Cardiovascular Surgery  , DOI: ( /j.jtcvs ) Copyright © 2014 The American Association for Thoracic Surgery Terms and Conditions

7 Figure 6 Pressure wave propagation. Top, Drawings highlighting the moment when the pressure wave reaches the descending aorta (time ∼ second) in the normal and gothic arch. Colors denote pressure values, from smallest (blue) to largest (yellow). Cross-section 1, pressure magnitude plotted against time at 4 points located at the anterior, posterior, and left and right wall in a cross section of the ascending aorta. Cross-section 2, pressure magnitude plotted against time at 4 points located at the superior, inferior, and left and right wall in a cross section of the horizontal aorta. The Journal of Thoracic and Cardiovascular Surgery  , DOI: ( /j.jtcvs ) Copyright © 2014 The American Association for Thoracic Surgery Terms and Conditions

8 Figure 7 Wall shear stress (WSS) mapping and magnitude. Top, WSS distribution at an instant corresponding to the passage of the pressure wave (time ≈ second) in the Left, normal and Right, gothic arch. Colors denote WSS values, from smallest (blue) to largest (red). Cross-section 1, magnitude of the WSS plotted against time at 4 points located at the anterior, posterior, and left and right wall in a cross section of the ascending aorta (Left, Romanesque arch; Right, gothic arch). Cross section 2, magnitude of the WSS plotted against time at 4 points located at the superior, inferior, and left and right wall in a cross section of the horizontal aorta (Left, Romanesque arch; Right, gothic arch). The Journal of Thoracic and Cardiovascular Surgery  , DOI: ( /j.jtcvs ) Copyright © 2014 The American Association for Thoracic Surgery Terms and Conditions

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