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Gregory AJ, Fedak PWM. Commentary: Time to test drive aortic biomechanics for risk prediction. J Thorac Cardiovasc Surg 2024; 167:2025-2026. [PMID: 36460516 DOI: 10.1016/j.jtcvs.2022.10.043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Accepted: 10/30/2022] [Indexed: 11/06/2022]
Affiliation(s)
- Alexander J Gregory
- Department of Anesthesiology, Perioperative and Pain Medicine, Cumming School of Medicine, University of Calgary, Libin Cardiovascular Institute, Calgary, Alberta, Canada
| | - Paul W M Fedak
- Section of Cardiac Surgery, Department of Cardiac Sciences, Cumming School of Medicine, University of Calgary, Libin Cardiovascular Institute, Calgary, Alberta, Canada.
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2
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Chiariello GA, Di Mauro M, Pasquini A, Bruno P, Nesta M, Fabiani L, Mazza A, Meloni M, Baldo E, Ponzo M, Ferraro F, Conserva AD, D’Acierno E, Villa E, Trani C, Burzotta F, Massetti M. Progression of the ascending aorta diameter after surgical or transcatheter bicuspid aortic valve replacement. INTERDISCIPLINARY CARDIOVASCULAR AND THORACIC SURGERY 2024; 38:ivae100. [PMID: 38775458 PMCID: PMC11142625 DOI: 10.1093/icvts/ivae100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Revised: 03/17/2024] [Accepted: 05/17/2024] [Indexed: 06/02/2024]
Abstract
OBJECTIVES Ascending aorta (AA) dilatation in patients with bicuspid aortic valve (AV) is related both to genetic and haemodynamic factors. The aim of this study is to compare late progression of AA dilatation in bicuspid AV patients undergoing surgical aortic valve replacement (SAVR) versus transcatheter aortic valve implantation (TAVI). METHODS Data of 189 consecutive patients who underwent AV replacement for severe bicuspid AV stenosis were prospectively collected. Patients who underwent SAVR were compared to patients who underwent TAVI. Indication to the procedure was validated by the institutional Heart Team. Aortic diameters were evaluated by transthoracic echocardiogram. Differences between preoperative and long-term follow-up AA diameters were compared in the 2 groups. RESULTS Between January 2015 and December 2021, 143 (76%) patients underwent SAVR and 46 (24%) patients underwent TAVI. At 4.6 (standard deviation 1.7) years follow-up, patients in the TAVI group showed significantly lower survival (P = 0.00013) and event-free survival (P < 0.0001). AA diameter progression was lower in surgical compared to transcatheter patients, 0.95 (0.60, 1.30) vs 1.65 (0.67, 2.63) mm, P = 0.02. AA diameter progression indexed for body surface area and height was lower in the surgical group: 0.72 (0.38, 1.05) vs 1.05 (0.39, 1.71) mm/m2, P = 0.02, and 0.59 (0.36, 0.81) vs 1.11 (0.44, 1.78) mm/m, P = 0.001, respectively. At multivariable linear regression analysis transcatheter procedure, baseline aortic diameter and paravalvular leak were significantly associated with increased postoperative AA dilatation. CONCLUSIONS Bicuspid AV patients who underwent SAVR, showed significantly less long-term AA diameter progression than patients who underwent transcatheter procedure.
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Affiliation(s)
- Giovanni Alfonso Chiariello
- Department of Cardiovascular Sciences, Agostino Gemelli Foundation Polyclinic IRCCS, Rome, Italy
- Catholic University of the Sacred Heart, Rome, Italy
| | - Michele Di Mauro
- Heart and Vascular Centre, Cardiovascular Research Institute, CARIM, Maastricht, Netherlands
| | - Annalisa Pasquini
- Department of Cardiovascular Sciences, Agostino Gemelli Foundation Polyclinic IRCCS, Rome, Italy
- Catholic University of the Sacred Heart, Rome, Italy
| | - Piergiorgio Bruno
- Department of Cardiovascular Sciences, Agostino Gemelli Foundation Polyclinic IRCCS, Rome, Italy
- Catholic University of the Sacred Heart, Rome, Italy
| | - Marialisa Nesta
- Department of Cardiovascular Sciences, Agostino Gemelli Foundation Polyclinic IRCCS, Rome, Italy
- Catholic University of the Sacred Heart, Rome, Italy
| | - Ludovica Fabiani
- Department of Cardiovascular Sciences, Agostino Gemelli Foundation Polyclinic IRCCS, Rome, Italy
- Catholic University of the Sacred Heart, Rome, Italy
| | - Andrea Mazza
- Department of Cardiovascular Sciences, Agostino Gemelli Foundation Polyclinic IRCCS, Rome, Italy
- Catholic University of the Sacred Heart, Rome, Italy
| | - Martina Meloni
- Department of Cardiology, Thoracic and Vascular Sciences, S. Matteo University Hospital, Pavia, Italy
| | | | - Myriana Ponzo
- Department of Cardiology, Cristo Re Hospital, Rome, Italy
| | - Francesco Ferraro
- Department of Cardiovascular Sciences, Agostino Gemelli Foundation Polyclinic IRCCS, Rome, Italy
- Catholic University of the Sacred Heart, Rome, Italy
| | - Antonio Davide Conserva
- Department of Cardiovascular Sciences, Agostino Gemelli Foundation Polyclinic IRCCS, Rome, Italy
- Catholic University of the Sacred Heart, Rome, Italy
| | - Edoardo D’Acierno
- Department of Cardiovascular Sciences, Agostino Gemelli Foundation Polyclinic IRCCS, Rome, Italy
- Catholic University of the Sacred Heart, Rome, Italy
| | - Emmanuel Villa
- Department of Cardiovascular Surgery, Cardiac Surgery Unit, Poliambulanza Foundation Hospital, Brescia, Italy
| | - Carlo Trani
- Department of Cardiovascular Sciences, Agostino Gemelli Foundation Polyclinic IRCCS, Rome, Italy
- Catholic University of the Sacred Heart, Rome, Italy
| | - Francesco Burzotta
- Department of Cardiovascular Sciences, Agostino Gemelli Foundation Polyclinic IRCCS, Rome, Italy
- Catholic University of the Sacred Heart, Rome, Italy
| | - Massimo Massetti
- Department of Cardiovascular Sciences, Agostino Gemelli Foundation Polyclinic IRCCS, Rome, Italy
- Catholic University of the Sacred Heart, Rome, Italy
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Abstract
PURPOSE OF REVIEW Bicuspid aortic valve (BAV) disease is observed in 1-2% of the general population. In addition to valve-related complications (such as aortic stenosis and aortic regurgitation), individuals with BAV often develop dilatation of the proximal aorta (aortic root and ascending aorta), a condition termed BAV aortopathy. The development of BAV aortopathy can occur independent of valvular alterations and can lead to aneurysm formation, aortic dissection or aortic rupture. This review aims to update the clinician with an approach to BAV aortopathy decision making in keeping with the 2022 American College of Cardiology (ACC)/American Heart Association (AHA) Guideline recommendations. RECENT FINDINGS The ACC/AHA 2022 guidelines provide a contemporary and comprehensive approach to the diagnosis and treatment of aortic pathologies. We review the thresholds for replacement of the aortic root and/or ascending aorta along with the strength and level of evidence recommendations. We also review the various Class 2A and 2B recommendations for earlier intervention, which emphasize the importance of experienced surgeons, and multidisciplinary aortic teams (MATs). SUMMARY BAV aortopathy is a common and heterogenous clinical problem. The decision making around timing of intervention requires a personalized approach that is based on the aortic dimensions, valve function, rate of growth, family history, patient factors, and surgical experience within MATs.
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Affiliation(s)
- Raj Verma
- Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Gideon Cohen
- Division of Cardiac Surgery, Sunnybrook Hospital, Toronto, Canada
| | - Jillian Colbert
- Department of Cardiac Sciences, Cumming School of Medicine, University of Calgary, Libin Cardiovascular Institute, Calgary, Alberta, Canada
| | - Paul W M Fedak
- Department of Cardiac Sciences, Cumming School of Medicine, University of Calgary, Libin Cardiovascular Institute, Calgary, Alberta, Canada
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Fatehi Hassanabad A, King MA, Di Martino E, Fedak PWM, Garcia J. Clinical implications of the biomechanics of bicuspid aortic valve and bicuspid aortopathy. Front Cardiovasc Med 2022; 9:922353. [PMID: 36035900 PMCID: PMC9411999 DOI: 10.3389/fcvm.2022.922353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2022] [Accepted: 07/25/2022] [Indexed: 11/27/2022] Open
Abstract
Bicuspid aortic valve (BAV), which affects up to 2% of the general population, results from the abnormal fusion of the cusps of the aortic valve. Patients with BAV are at a higher risk for developing aortic dilatation, a condition known as bicuspid aortopathy, which is associated with potentially life-threatening sequelae such as aortic dissection and aortic rupture. Although BAV biomechanics have been shown to contribute to aortopathy, their precise impact is yet to be delineated. Herein, we present the latest literature related to BAV biomechanics. We present the most recent definitions and classifications for BAV. We also summarize the current evidence pertaining to the mechanisms that drive bicuspid aortopathy. We highlight how aberrant flow patterns can contribute to the development of aortic dilatation. Finally, we discuss the role cardiac magnetic resonance imaging can have in assessing and managing patient with BAV and bicuspid aortopathy.
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Affiliation(s)
- Ali Fatehi Hassanabad
- Section of Cardiac Surgery, Department of Cardiac Sciences, Cumming School of Medicine, Libin Cardiovascular Institute, Calgary, AB, Canada
| | - Melissa A. King
- Section of Cardiac Surgery, Department of Cardiac Sciences, Cumming School of Medicine, Libin Cardiovascular Institute, Calgary, AB, Canada
| | - Elena Di Martino
- Department of Civil Engineering, University of Calgary, Calgary, AB, Canada
- Libin Cardiovascular Institute, University of Calgary, Calgary, AB, Canada
- Centre for Bioengineering Research and Education, University of Calgary, Calgary, AB, Canada
| | - Paul W. M. Fedak
- Section of Cardiac Surgery, Department of Cardiac Sciences, Cumming School of Medicine, Libin Cardiovascular Institute, Calgary, AB, Canada
| | - Julio Garcia
- Department of Cardiac Sciences, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
- Stephenson Cardiac Imaging Centre, Libin Cardiovascular Institute, Calgary, AB, Canada
- Department of Radiology, University of Calgary, Calgary, AB, Canada
- Alberta Children's Hospital Research Institute, University of Calgary, Calgary, AB, Canada
- *Correspondence: Julio Garcia
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5
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Aortic Biomechanics and Clinical Applications. Anesthesiology 2022; 137:351-363. [PMID: 35904358 DOI: 10.1097/aln.0000000000004313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The aorta contributes to cardiovascular physiology and function. Understanding biomechanics in health, disease, and after aortic interventions will facilitate optimization of perioperative patient care.
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Vessel structural stress mediates aortic media degeneration in bicuspid aortopathy: New insights based on patient-specific fluid-structure interaction analysis. J Biomech 2021; 129:110805. [PMID: 34678623 DOI: 10.1016/j.jbiomech.2021.110805] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 10/06/2021] [Accepted: 10/06/2021] [Indexed: 11/22/2022]
Abstract
This study aimed to assess the relationship between local mechanical stimuli and regional aortic tissue degeneration using fluid-structure interaction (FSI) analysis in patients with bicuspid aortic valve (BAV) disease. Nine patients underwent ascending aortic replacement were recruited. Tissues were collected to evaluate the pathology features in four regions, greater curvature (GC-region), posterior (P-region), anterior (A-region), and lesser curvature (LC-region). FSI analysis was performed to quantify vessel structural stress (VSS) and flow-induced parameters, including wall shear stress (WSS), oscillatory shear index (OSI), and particle relative residence time (RRT). The correlation between these biomechanical metrics and tissue degeneration was analyzed. Elastin in the medial layer and media thickness were thinnest and the gap between fibers was biggest in the GC-region, followed by the P-region and A-region, while the elastin and media thickness were thickest and the gap smallest in the LC-region. The collagen deposition followed a pattern with the biggest in the GC-region and least in the LC-region. There is a strong negative correlation between mean or peak VSS and elastin thickness in the arterial wall in the GC-region (r = -0.917; p = 0.001 and r = -0.899; p = 0.001), A-region (r = -0.748; p = 0.020 and r = -0.700; p = 0.036) and P-region (r = -0.773; p = 0.014 and r = -0.769; p = 0.015), and between mean VSS and fiber distance in the A-region (r = -0.702, p = 0.035). Moreover, strong negative correlation between mean or peak VSS and media thickness was also observed. No correlation was found between WSS, OSI, and RRT and aortic tissue degeneration in these four regions. These findings indicate that increased VSS correlated with local elastin degradation and aortic media degeneration, implying that it could be a potential biomechanical parameter for a refined risk stratification for patients with BAV.
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Junco-Vicente A, del Río-García Á, Martín M, Rodríguez I. Update in Biomolecular and Genetic Bases of Bicuspid Aortopathy. Int J Mol Sci 2021; 22:ijms22115694. [PMID: 34071740 PMCID: PMC8198265 DOI: 10.3390/ijms22115694] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 05/21/2021] [Accepted: 05/24/2021] [Indexed: 12/13/2022] Open
Abstract
Bicuspid aortic valve (BAV) associated with aortopathy is the most common congenital heart disease in the general population. Far from being a simple harmless valve malformation, it can be a complex and heterogeneous disease and a source of chronic and acute pathology (early valvular disease, aneurysm, dissection). In the previous years, intense research has been carried out to find out and understand its mechanisms, but the pathophysiology of the disease is still not fully understood and many questions remain open. Recent studies have discovered several genetic mutations involved in the development of valvular and aortic malformations, but still cannot explain more than 5–10% of cases. Other studies have also focused on molecular alterations and cellular processes (TGF-β pathway, microRNAs, degradation of the extracellular matrix, metalloproteinases, etc.), being a field in constant search and development, looking for a therapeutic target to prevent the development of the disease. Increased knowledge about this multifaceted disorder, derived from both basic and clinical research, may influence the diagnosis, follow-up, prognosis, and therapies of affected patients in the near future. This review focuses on the latest and outstanding developments on the molecular and genetic investigations of the bicuspid aortopathy.
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Affiliation(s)
- Alejandro Junco-Vicente
- Cardiology Department, Heart Area, Hospital Universitario Central de Asturias (HUCA), 33011 Oviedo, Spain;
| | - Álvaro del Río-García
- Cardiac Pathology Research Group, Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), 33011 Oviedo, Spain;
| | - María Martín
- Cardiology Department, Heart Area, Hospital Universitario Central de Asturias (HUCA), 33011 Oviedo, Spain;
- Cardiac Pathology Research Group, Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), 33011 Oviedo, Spain;
- REDinREN from Instituto de Salud Carlos III (ISCIII), 28040 Madrid, Spain
- Correspondence: (M.M.); (I.R.)
| | - Isabel Rodríguez
- Cardiac Pathology Research Group, Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), 33011 Oviedo, Spain;
- REDinREN from Instituto de Salud Carlos III (ISCIII), 28040 Madrid, Spain
- Correspondence: (M.M.); (I.R.)
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8
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Hassanabad AF, Vasanthan V, Fedak PWM. Commentary: A picture is worth a thousand words: Improving surgical approaches using advanced multimodal cardiac imaging. J Thorac Cardiovasc Surg 2021; 163:e247-e248. [PMID: 33642107 DOI: 10.1016/j.jtcvs.2021.01.125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 01/28/2021] [Accepted: 01/28/2021] [Indexed: 10/22/2022]
Affiliation(s)
- Ali Fatehi Hassanabad
- Section of Cardiac Surgery, Department of Cardiac Sciences, Libin Cardiovascular Institute, Cumming School of Medicine, Calgary, Alberta, Canada
| | - Vishnu Vasanthan
- Section of Cardiac Surgery, Department of Cardiac Sciences, Libin Cardiovascular Institute, Cumming School of Medicine, Calgary, Alberta, Canada
| | - Paul W M Fedak
- Section of Cardiac Surgery, Department of Cardiac Sciences, Libin Cardiovascular Institute, Cumming School of Medicine, Calgary, Alberta, Canada.
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Four-dimensional-flow Magnetic Resonance Imaging of the Aortic Valve and Thoracic Aorta. Radiol Clin North Am 2020; 58:753-763. [PMID: 32471542 DOI: 10.1016/j.rcl.2020.02.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Blood flow through the heart and great vessels is sensitive to time and multiple velocity directions. The assessment of its three-dimensional nature has been limited. Recent advances in magnetic resonance imaging (MRI) allow the comprehensive visualization and quantification of in vivo flow dynamics using four-dimensional (4D)-flow MRI. In addition, the technique provides the opportunity to obtain advanced hemodynamic measures. This article introduces 4D-flow MRI as it is currently used for blood flow visualization and quantification of cardiac hemodynamic parameters. It discusses its advantages relative to other flow MRI techniques and describes its potential clinical applications.
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10
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Mazzi V, Gallo D, Calò K, Najafi M, Khan MO, De Nisco G, Steinman DA, Morbiducci U. A Eulerian method to analyze wall shear stress fixed points and manifolds in cardiovascular flows. Biomech Model Mechanobiol 2019; 19:1403-1423. [PMID: 31865482 DOI: 10.1007/s10237-019-01278-3] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Accepted: 12/08/2019] [Indexed: 12/12/2022]
Abstract
Based upon dynamical systems theory, a fixed point of a vector field such as the wall shear stress (WSS) at the luminal surface of a vessel is a point where the vector field vanishes. Unstable/stable manifolds identify contraction/expansion regions linking fixed points. The significance of such WSS topological features lies in their strong link with "disturbed" flow features like flow stagnation, separation and reversal, deemed responsible for vascular dysfunction initiation and progression. Here, we present a Eulerian method to analyze WSS topological skeleton through the identification and classification of WSS fixed points and manifolds in complex vascular geometries. The method rests on the volume contraction theory and analyzes the WSS topological skeleton through the WSS vector field divergence and Poincar[Formula: see text] index. The method is here applied to computational hemodynamics models of carotid bifurcation and intracranial aneurysm. An in-depth analysis of the time dependence of the WSS topological skeleton along the cardiac cycle is provided, enriching the information obtained from cycle-average WSS. Among the main findings, it emerges that on the carotid bifurcation, instantaneous WSS fixed points co-localize with cycle-average WSS fixed points for a fraction of the cardiac cycle ranging from 0 to [Formula: see text]; a persistent instantaneous WSS fixed point confined on the aneurysm dome does not co-localize with the cycle-average low-WSS region. In conclusion, the here presented approach shows the potential to speed up studies on the physiological significance of WSS topological skeleton in cardiovascular flows, ultimately increasing the chance of finding mechanistic explanations to clinical observations.
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Affiliation(s)
- Valentina Mazzi
- Department of Mechanical and Aerospace Engineering, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129, Turin, Italy
- PolitoBIOMed Lab, Politecnico di Torino, Turin, Italy
| | - Diego Gallo
- Department of Mechanical and Aerospace Engineering, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129, Turin, Italy
- PolitoBIOMed Lab, Politecnico di Torino, Turin, Italy
| | - Karol Calò
- Department of Mechanical and Aerospace Engineering, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129, Turin, Italy
- PolitoBIOMed Lab, Politecnico di Torino, Turin, Italy
| | - Mehdi Najafi
- Biomedical Simulation Laboratory, Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, ON, Canada
| | | | - Giuseppe De Nisco
- Department of Mechanical and Aerospace Engineering, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129, Turin, Italy
- PolitoBIOMed Lab, Politecnico di Torino, Turin, Italy
| | - David A Steinman
- Biomedical Simulation Laboratory, Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, ON, Canada
| | - Umberto Morbiducci
- Department of Mechanical and Aerospace Engineering, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129, Turin, Italy.
- PolitoBIOMed Lab, Politecnico di Torino, Turin, Italy.
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11
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Shokina N, Bauer A, Teschner G, Buchenberg WB, Tropea C, Egger H, Hennig J, Krafft AJ. MR-based wall shear stress measurements in fully developed turbulent flow using the Clauser plot method. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2019; 305:16-21. [PMID: 31158791 DOI: 10.1016/j.jmr.2019.05.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Revised: 05/21/2019] [Accepted: 05/24/2019] [Indexed: 06/09/2023]
Abstract
In arterial blood flow wall shear stress (WSS) quantifies the frictional force that flowing blood exerts on a vessel wall. WSS can be directly estimated from phase-contrast (PC) MR velocity measurements and has been suggested as a biomarker in cardio-vascular diseases. We present and investigate the application of the Clauser plot method for estimating WSS in fully developed turbulent stationary flow using PC velocity measurements. The Clauser plot method estimates WSS from the logarithmic region of boundary layer in fully developed turbulent stationary flow. The Clauser plot method was evaluated using 2D PC-MR phantom measurements at 3 T for different in-plane resolutions at various Reynolds numbers. WSS values derived from the Clauser plot were compared to results from Laser Doppler Velocimetry (LDV) measurements and theoretical results calculated using the friction factor formula for smooth pipe flow. For all Reynolds numbers, WSS values derived from the Clauser plot were in good agreement with results from LDV measurements and values using the friction factor formula (relative deviations ∼5%). Furthermore, Clauser plot derived results were almost independent of spatial resolution, in contrast to WSS results obtained with our in-house software tool for MR-based WSS quantification showing relative deviations of more than 100%. In fully developed turbulent flow, the Clauser plot method provides highly consistent WSS independent of the underlying spatial resolution. Therefore, it renders a valuable approach for MR-based WSS estimates in controllable flow settings. Although its direct in vivo applicability is severely limited because of the different flow character, it may serve as helpful approach for validation of MR-based WSS quantification algorithms prior to their clinical application.
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Affiliation(s)
- Nina Shokina
- Dept. of Radiology, Medical Physics, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Germany.
| | - Andreas Bauer
- Institute for Fluid Mechanics and Aerodynamics, Department of Mechanical Engineering, Technische Universität Darmstadt, Darmstadt, Germany
| | - Gabriel Teschner
- Institute for Numerical Analysis and Scientific Computing, Department of Mathematics, Technische Universität Darmstadt, Darmstadt, Germany
| | - Waltraud B Buchenberg
- Dept. of Radiology, Medical Physics, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Germany
| | - Cameron Tropea
- Institute for Fluid Mechanics and Aerodynamics, Department of Mechanical Engineering, Technische Universität Darmstadt, Darmstadt, Germany
| | - Herbert Egger
- Institute for Numerical Analysis and Scientific Computing, Department of Mathematics, Technische Universität Darmstadt, Darmstadt, Germany
| | - Jürgen Hennig
- Dept. of Radiology, Medical Physics, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Germany
| | - Axel J Krafft
- Dept. of Radiology, Medical Physics, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Germany
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12
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Grewal N, Gittenberger-de Groot AC. Wall Shear Stress Directional Abnormalities in BAV Aortas: Toward a New Hemodynamic Predictor of Aortopathy? Front Physiol 2019; 10:225. [PMID: 30941050 PMCID: PMC6433698 DOI: 10.3389/fphys.2019.00225] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Accepted: 02/21/2019] [Indexed: 12/23/2022] Open
Affiliation(s)
- Nimrat Grewal
- Department of Cardiothoracic Surgery, Leiden University Medical Center, Leiden, Netherlands.,Department of Anatomy and Embryology, Leiden University Medical Center, Leiden, Netherlands
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