The influence of mechanical properties on wall stress and distensibility of the dilated ascending aorta  Ruth J Okamoto, DSc, Haodong Xu, MD, PhD, Nicholas.

Slides:



Advertisements
Similar presentations
Date of download: 6/28/2016 Copyright © ASME. All rights reserved. From: Stability of Carotid Artery Under Steady-State and Pulsatile Blood Flow: A Fluid–Structure.
Advertisements

Control of ventricular unloading using an electrocardiogram-synchronized Thoratec paracorporeal ventricular assist device  Raffael Amacher, MSc, Alberto.
Loss of elastic fiber integrity compromises common carotid artery function: Implications for vascular aging  J. Ferruzzi, M.R. Bersi, R.P. Mecham, F.
Date of download: 10/23/2017 Copyright © ASME. All rights reserved.
Lars G. Svensson, MD, PhD, Eugene H. Blackstone, MD 
Ali N. Azadani, PhD, Sam Chitsaz, MD, Peter B
Prediction of recurrent coarctation by early postoperative blood pressure gradient  T. K. Susheel Kumar, MD, David Zurakowski, PhD, Rishika Sharma, MD,
Chang M. He, MSc, Margot R. Roach, MD, PhD  Journal of Vascular Surgery 
Time-resolved magnetic resonance angiography and flow-sensitive 4-dimensional magnetic resonance imaging at 3 Tesla for blood flow and wall shear stress.
Long-term prognosis of ascending aortic aneurysm after aortic valve replacement for bicuspid versus tricuspid aortic valve stenosis  Evaldas Girdauskas,
Replacement of the ascending aorta in bicuspid aortic valve disease: Where do we draw the line?  Thoralf M. Sundt, MD  The Journal of Thoracic and Cardiovascular.
Stephen H. McKellar, MD, David J
Asymmetric aortic expansion of the aneurysm neck: Analysis and visualization of shape changes with electrocardiogram-gated magnetic resonance imaging 
Tina M. Morrison, phd, Gilwoo Choi, MS, Christopher K
Mechanical stress is associated with right ventricular response to pulmonary valve replacement in patients with repaired tetralogy of Fallot  Dalin Tang,
Myosplint decreases wall stress without depressing function in the failing heart: a finite element model study  Julius M Guccione, PhD, Ali Salahieh,
Cause of degenerative disease of the trileaflet aortic valve: review of subject and presentation of a new theory  Francis Robicsek, MD, PhD, Mano J Thubrikar,
The effect of ventricular volume reduction surgery in the dilated, poorly contractile left ventricle: A simple finite element analysis  Mark B. Ratcliffe,
Biomechanical Properties of the Thoracic Aneurysmal Wall: Differences Between Bicuspid Aortic Valve and Tricuspid Aortic Valve Patients  Caroline Forsell,
Personalized cardiac surgery: Can noninvasive flow imaging lead to individualized resection strategies for bicuspid aortopathy?  Nicholas D. Andersen,
Pulmonary hypertension in valve disease: A beast of the past?
Severe aortic insufficiency and normal systolic function: determining regional left ventricular wall stress by finite-element analysis  Brian P Cupps,
Differential Tensile Strength and Collagen Composition in Ascending Aortic Aneurysms by Aortic Valve Phenotype  Joseph E. Pichamuthu, MS, Julie A. Phillippi,
Sex difference in the mechanical properties of the abdominal aorta in human beings  Björn Sonesson, MD, Toste Länne, MD, PhD, Einar Vernersson, MD, PhD,
Indications for aortic replacement
Acute angulation of the aortic arch predisposes a patient to ascending aortic dilatation and aortic regurgitation late after the arterial switch operation.
Mark H. Murdock, BSc, Jordan T. Chang, BA, Samuel K
Clinical-pathologic conference in thoracic surgery: Proximal pulmonary artery obstruction secondary to Takayasu arteritis  Thoralf M. Sundt, MD  The Journal.
Options for repair of a bicuspid aortic valve and ascending aortic aneurysm  Thoralf M Sundt, MD, Bassem N Mora, MD, Marc R Moon, MD, Marci S Bailey, MSN,
Bicuspid aortic valve aortopathy: One size fits all?
Determination of the elastic modulus of ascending thoracic aortic aneurysm at different ranges of pressure using uniaxial tensile testing  Khalil Khanafer,
Simple versus complex degenerative mitral valve disease
Late false-lumen expansion predicted by preoperative blood flow simulation in a patient with chronic type B aortic dissection  Chikara Ueki, MD, Hiroshi.
Carsten J. Beller, MD, Martha M
Risk-corrected impact of mechanical versus bioprosthetic valves on long-term mortality after aortic valve replacement  Ole Lund, MD, PhD, Martin Bland,
Control of ventricular unloading using an electrocardiogram-synchronized Thoratec paracorporeal ventricular assist device  Raffael Amacher, MSc, Alberto.
Valve-sparing root repair: V-shaped remodeling can be performed in all sinuses  Paul P. Urbanski, MD, PhD  The Journal of Thoracic and Cardiovascular Surgery 
Bruce H. Smaill, PhDa, David C. McGiffin, MB, BS, FRACSb, Ian J
Andreas Zierer, MD, Rochus K. Voeller, MD, Karen E
Michael L. Klyachkin, MD, Sandip Dhara, BS, Gilbert J
Salvatore Pasta, PhD, Julie A. Phillippi, PhD, Thomas G
Management of dilated ascending aorta during aortic valve replacement: Valve replacement alone versus aorta wrapping versus aorta replacement  Seung Hyun.
Greater asymmetric wall shear stress in Sievers' type 1/LR compared with 0/LAT bicuspid aortic valves after valve-sparing aortic root replacement  Elizabeth.
Echocardiography underestimates the aortic root diameter in patients with bicuspid aortic valve, but short-axis imaging can help  Hector I. Michelena,
Johnson Hua, BS, William R. Mower, MD, PhD  Journal of Vascular Surgery 
Hans-Hinrich Sievers, MD 
The Journal of Thoracic and Cardiovascular Surgery
Aortic valve reconstruction using autologous pericardium for patients aged less than 60 years  Shigeyuki Ozaki, MD, PhD, Isamu Kawase, MD, PhD, Hiromasa.
Aortic root numeric model: Annulus diameter prediction of effective height and coaptation in post–aortic valve repair  Gil Marom, MSc, Rami Haj-Ali, PhD,
A fate worse than death  Jennifer S. Lawton, MD 
Increase in size of the pulmonary autograft after the ross operation in children: Growth or dilation?  Laszlo Solymar, MD, PhD, Göran Südow, MD, Daniel.
An acutely angled high takeoff left main coronary artery in an aortic root and proximal arch aneurysm  Kyung Hwa Kim, MD, PhD  The Journal of Thoracic.
Characteristics and long-term outcomes of contemporary patients with bicuspid aortic valves  Ahmad Masri, MD, Vidyasagar Kalahasti, MD, Saqer Alkharabsheh,
E. Jerry Cohn, MD, Marshall E. Benjamin, MD, Gail P
Biomechanical properties of ruptured versus electively repaired abdominal aortic aneurysm wall tissue  Elena S. Di Martino, PhD, Ajay Bohra, MS, Jonathan.
Concomitant replacement of the ascending aorta is free—for some
Riccardo Codecasa, MD, Massimo A
Tricuspid annulus diameter does not predict the development of tricuspid regurgitation after mitral valve repair for mitral regurgitation due to degenerative.
Chan B. Park, MD, Kevin L. Greason, MD, Rakesh M. Suri, MD, Hector I
Richard P Anderson, MD, Ruyun Jin, MD, Gary L Grunkemeier, PhD 
The Journal of Thoracic and Cardiovascular Surgery
John M. Stulak, MD, Joseph A. Dearani, MD, Harold M
Why arch curvature affects arch resistance
The safety, efficacy, and pharmacokinetics of esmolol for blood pressure control immediately after repair of coarctation of the aorta in infants and children:
Bicuspid aortic valve and ascending aortic aneurysm are not associated with germline or somatic homeobox NKX2-5 gene polymorphism in 19 patients  Ramanath.
A randomized comparison of the MCRI On-X and CarboMedics Top Hat bileaflet mechanical replacement aortic valves: Early postoperative hemodynamic function.
Ascending thoracic aortic aneurysms are associated with compositional remodeling and vessel stiffening but not weakening in age-matched subjects  Dimitrios.
Thanos Sioris, MD, Tirone E
Designing valves: An art or science?
Relationship of aortic cross-sectional area to height ratio and the risk of aortic dissection in patients with bicuspid aortic valves  Lars G Svensson,
Presentation transcript:

The influence of mechanical properties on wall stress and distensibility of the dilated ascending aorta  Ruth J Okamoto, DSc, Haodong Xu, MD, PhD, Nicholas T Kouchoukos, MD, Marc R Moon, MD, Thoralf M Sundt, MD  The Journal of Thoracic and Cardiovascular Surgery  Volume 126, Issue 3, Pages 842-850 (September 2003) DOI: 10.1016/S0022-5223(03)00728-1

Figure 1 Cylindrical model of aorta. A, Open cylindrical segment in stress-free configuration, characterized by opening angle α, stress-free inner radius Ri*, outer radius Ro*, and stress-free length Z*. When α > 180° as shown, the inner radius of the closed ring becomes the outer curvature of the open ring, hence Ri* > Ro*. Curved arrows show how the open segment is closed. B, Closed cylinder in unloaded configuration with inner and outer radii Ri and Ro and length Z. C, Deformed cylinder with applied internal pressure Pi and axial stretch λz with inner and outer radii under load of ri and ro. The Journal of Thoracic and Cardiovascular Surgery 2003 126, 842-850DOI: (10.1016/S0022-5223(03)00728-1)

Figure 2 Comparison of response to simulated equibiaxial stretching between patient groups using fitted elastic properties obtained from biaxial test data. A and B, Marfan. C and D, Bicuspid aortic valve (BAV). E and F, Degenerative aneurysm (DA). Fitted data is used to eliminate slight differences in stretching protocols between patients; however, maximum stresses shown correspond closely to stresses reached during actual equibiaxial stretching experiments. The Journal of Thoracic and Cardiovascular Surgery 2003 126, 842-850DOI: (10.1016/S0022-5223(03)00728-1)

Figure 3 Model-predicted mean circumferential stress as a function of predicted lumen diameter for all patient groups: Marfan, open square;BAV, open diamond;DA, open circle. Dashed line shows linear fit to data: σ ̄c,sys(kPa) = −34.564 + 62.3*dsys(cm), R2 = 0.469. The Journal of Thoracic and Cardiovascular Surgery 2003 126, 842-850DOI: (10.1016/S0022-5223(03)00728-1)

Figure 4 A, Mean circumferential stress in the cylindrical model plotted as a function of blood pressure for 4 representative patients. Marfan (39 years): open square; younger BAV (39 years): closed triangle; older BAV (66 years): open triangle; DA (77 years), closed circle. B, Normalized radius (ri/Ri) versus blood pressure for the same patients. Open symbols indicate model predicted values at 10–mm Hg pressure increments. Corresponding closed symbols indicate model-predicted values at each patient's reported preoperative systolic and diastolic blood pressure. The Journal of Thoracic and Cardiovascular Surgery 2003 126, 842-850DOI: (10.1016/S0022-5223(03)00728-1)

Figure 5 Stretch ratios corresponding to systolic and diastolic stress states were determined using fitted elastic properties obtained from biaxial testing. A, Predicted circumferential stretch ratios. B, Axial stretch ratios plotted as a function of age for σc = 262 kPa and σz = 117 kPa. C, Predicted circumferential stretch ratios. D, Axial stretch ratios plotted as a function of age for σc = 130 kPa and σz = 76 kPa. Symbols denote different clinical groups: Marfan (open square),BAV (open diamond), DA (closed circle),and dashed lines show a linear fit of the data as a function of age. E, Mean circumferential (unshaded) and axial (shaded) stretch ratios for each clinical group. F, Change in circumferential stretch ratio between stress states shown in C and A. *Significantly greater change in the younger BAV group compared with all other patient groups. The Journal of Thoracic and Cardiovascular Surgery 2003 126, 842-850DOI: (10.1016/S0022-5223(03)00728-1)