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Bianchi D, Conti M, Bissacco D, Domanin M, Trimarchi S, Auricchio F. Impact of thoracic endovascular aortic repair on aortic biomechanics: Integration of in silico and ex vivo analysis using porcine model. INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN BIOMEDICAL ENGINEERING 2023; 39:e3594. [PMID: 35340129 DOI: 10.1002/cnm.3594] [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: 10/30/2021] [Revised: 02/09/2022] [Accepted: 03/16/2022] [Indexed: 05/12/2023]
Abstract
Thoracic endovascular aortic repair (TEVAR) is widespread in clinical practice for treating aortic diseases but it has relevant systemic complications, such as increase of the cardiac workload due to post-TEVAR aortic stiffening, and local issues such as re-entry tears due to the tissue damage caused by endograft interaction. The present study aims to elucidate these aortic biomechanical mechanisms by coupling ex vivo and in silico analysis. By ex vivo tests, the pulse wave velocity before and after TEVAR is measured. Uni-axial tensile tests are performed to measure regional mechanical response of tissue samples, supplied as input data for the in silico analysis. Numerical analysis is finally performed to compute the wall stress induced by the stent-graft deployment and the arterial pressurization. The ex vivo results highlight an increase of baseline PWV by a mean .78 m/s or 12% after TEVAR with a 100 mm stent-graft (p <.013). In the in silico analysis, the average von Mises stress in the landing zone increases of about 15% and 20% using, respectively stent-graft with radial oversizing of 10% and 20%. This work shows the effectiveness of integrated framework to analyze the biomechanical post TEVAR mechanisms. Moreover, the obtained results quantify the effect of prosthesis selection on the stiffening of the aorta after TEVAR and on the local increase of the aortic wall stress that is proportional to the stent-graft oversizing.
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Affiliation(s)
- Daniele Bianchi
- Department of Civil Engineering and Architecture (DICAr), University of Pavia, Pavia, Italy
| | - Michele Conti
- Department of Civil Engineering and Architecture (DICAr), University of Pavia, Pavia, Italy
| | - Daniele Bissacco
- Department of Health and Community Sciences, University of Milan, Milan, Italy
- Operative Unit of Vascular Surgery, Fondazione IRCCS Ca' Grande Ospedale Maggiore Policlinico Milano, Milan, Italy
| | - Maurizio Domanin
- Department of Health and Community Sciences, University of Milan, Milan, Italy
- Operative Unit of Vascular Surgery, Fondazione IRCCS Ca' Grande Ospedale Maggiore Policlinico Milano, Milan, Italy
| | - Santi Trimarchi
- Department of Health and Community Sciences, University of Milan, Milan, Italy
- Operative Unit of Vascular Surgery, Fondazione IRCCS Ca' Grande Ospedale Maggiore Policlinico Milano, Milan, Italy
| | - Ferdinando Auricchio
- Department of Civil Engineering and Architecture (DICAr), University of Pavia, Pavia, Italy
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Zhu Y, Imbrie-Moore AM, Paulsen MJ, Priromprintr B, Wang H, Lucian HJ, Farry JM, Woo YJ. Novel bicuspid aortic valve model with aortic regurgitation for hemodynamic status analysis using an ex vivo simulator. J Thorac Cardiovasc Surg 2022; 163:e161-e171. [PMID: 32747120 PMCID: PMC7769867 DOI: 10.1016/j.jtcvs.2020.06.028] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 06/11/2020] [Accepted: 06/15/2020] [Indexed: 02/03/2023]
Abstract
OBJECTIVE The objective was to design and evaluate a clinically relevant, novel ex vivo bicuspid aortic valve model that mimics the most common human phenotype with associated aortic regurgitation. METHODS Three bovine aortic valves were mounted asymmetrically in a previously validated 3-dimensional-printed left heart simulator. The non-right commissure and the non-left commissure were both shifted slightly toward the left-right commissure, and the left and right coronary cusps were sewn together. The left-right commissure was then detached and reimplanted 10 mm lower than its native height. Free margin shortening was used for valve repair. Hemodynamic status, high-speed videography, and echocardiography data were collected before and after the repair. RESULTS The bicuspid aortic valve model was successfully produced and repaired. High-speed videography confirmed prolapse of the fused cusp of the baseline bicuspid aortic valve models in diastole. Hemodynamic and pressure data confirmed accurate simulation of diseased conditions with aortic regurgitation and the subsequent repair. Regurgitant fraction postrepair was significantly reduced compared with that at baseline (14.5 ± 4.4% vs 28.6% ± 3.4%; P = .037). There was no change in peak velocity, peak gradient, or mean gradient across the valve pre- versus postrepair: 293.3 ± 18.3 cm/sec versus 325.3 ± 58.2 cm/sec (P = .29), 34.3 ± 4.2 mm Hg versus 43.3 ± 15.4 mm Hg (P = .30), and 11 ± 1 mm Hg versus 9.3 ± 2.5 mm Hg (P = .34), respectively. CONCLUSIONS An ex vivo bicuspid aortic valve model was designed that recapitulated the most common human phenotype with aortic regurgitation. These valves were successfully repaired, validating its potential for evaluating valve hemodynamics and optimizing surgical repair for bicuspid aortic valves.
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Affiliation(s)
- Yuanjia Zhu
- Department of Cardiothoracic Surgery, Stanford University, Stanford, CA,Department of Bioengineering, Stanford University, Stanford, CA
| | - Annabel M. Imbrie-Moore
- Department of Cardiothoracic Surgery, Stanford University, Stanford, CA,Department of Mechanical Engineering, Stanford University, Stanford, CA
| | | | - Bryant Priromprintr
- Department of Pediatrics, Division of Pediatric Cardiology, Stanford University, Stanford, CA
| | - Hanjay Wang
- Department of Cardiothoracic Surgery, Stanford University, Stanford, CA
| | - Haley J. Lucian
- Department of Cardiothoracic Surgery, Stanford University, Stanford, CA
| | - Justin M. Farry
- Department of Cardiothoracic Surgery, Stanford University, Stanford, CA
| | - Y. Joseph Woo
- Department of Cardiothoracic Surgery, Stanford University, Stanford, CA,Department of Bioengineering, Stanford University, Stanford, CA
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Kimura N, Itagaki R, Nakamura M, Tofrizal A, Yatabe M, Yoshizaki T, Kokubo R, Hishikawa S, Kunita S, Adachi H, Misawa Y, Yashiro T, Kawahito K. Limbicuspidalization of the Native Tricuspid Aortic Valve: A Porcine in Vivo Model of Bicuspid Aortopathy. Ann Vasc Dis 2022; 15:37-44. [PMID: 35432643 PMCID: PMC8958402 DOI: 10.3400/avd.oa.21-00116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Accepted: 02/01/2022] [Indexed: 11/13/2022] Open
Affiliation(s)
- Naoyuki Kimura
- Department of Cardiovascular Surgery, Saitama Medical Center, Jichi Medical University
| | - Ryo Itagaki
- Department of Surgery, Division of Cardiovascular Surgery, Jichi Medical University
| | - Masanori Nakamura
- Department of Electrical and Mechanical Engineering, Nagoya Institute of Technology
| | - Alimuddin Tofrizal
- Department of Anatomy, Division of Histology and Cell Biology, Jichi Medical University
| | - Megumi Yatabe
- Department of Anatomy, Division of Histology and Cell Biology, Jichi Medical University
| | - Takamichi Yoshizaki
- Department of Cardiovascular Surgery, Saitama Medical Center, Jichi Medical University
| | - Ryo Kokubo
- Department of Medical Engineering, Saitama Medical Center, Jichi Medical University
| | - Shuji Hishikawa
- Medical Education and Training Core, Center for Development of Advanced Medical Technology, Jichi Medical University
| | - Satoshi Kunita
- Animal Resource Laboratory, Center for Development of Advanced Medical Technology, Jichi Medical University
| | - Hideo Adachi
- Department of Cardiovascular Surgery, Saitama Medical Center, Jichi Medical University
| | - Yoshio Misawa
- Department of Surgery, Division of Cardiovascular Surgery, Jichi Medical University
| | - Takashi Yashiro
- Department of Anatomy, Division of Histology and Cell Biology, Jichi Medical University
| | - Koji Kawahito
- Department of Surgery, Division of Cardiovascular Surgery, Jichi Medical University
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Jia H, Kang L, Ma Z, Lu S, Huang B, Wang C, Zou Y, Sun Y. MicroRNAs involve in bicuspid aortic aneurysm: pathogenesis and biomarkers. J Cardiothorac Surg 2021; 16:230. [PMID: 34384454 PMCID: PMC8359579 DOI: 10.1186/s13019-021-01613-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2021] [Accepted: 08/03/2021] [Indexed: 01/27/2023] Open
Abstract
The incidence of bicuspid aortic valves (BAV) is high in the whole population, BAV-related thoracic aortic aneurysm (TAA) is accompanied by many adverse vascular events. So far, there are two key points in dealing with BAV-related TAA. First is fully understanding on its pathogenesis. Second is optimizing surgical intervention time. This review aims to illustrate the potential role of miRNAs in both aspects, that is, how miRNAs are involved in the occurrence and progression of BAV-related TAA, and the feasibilities of miRNAs as biomarkers.
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Affiliation(s)
- Hao Jia
- Department of Cardiac Surgery, Zhongshan Hospital, Fudan University, 1069 Xietu Road, 200032, Shanghai, People's Republic of China
| | - Le Kang
- Department of Cardiac Surgery, Zhongshan Hospital, Fudan University, 1069 Xietu Road, 200032, Shanghai, People's Republic of China
| | - Zhen Ma
- Central Laboratory of Cardiovascular Institute, Zhongshan Hospital, Fudan University, 1069 Xietu Road, 200032, Shanghai, People's Republic of China
| | - Shuyang Lu
- Department of Cardiac Surgery, Zhongshan Hospital, Fudan University, 1069 Xietu Road, 200032, Shanghai, People's Republic of China
| | - Ben Huang
- Department of Cardiac Surgery, Zhongshan Hospital, Fudan University, 1069 Xietu Road, 200032, Shanghai, People's Republic of China
| | - Chunsheng Wang
- Department of Cardiac Surgery, Zhongshan Hospital, Fudan University, 1069 Xietu Road, 200032, Shanghai, People's Republic of China.
| | - Yunzeng Zou
- Central Laboratory of Cardiovascular Institute, Zhongshan Hospital, Fudan University, 1069 Xietu Road, 200032, Shanghai, People's Republic of China.
| | - Yongxin Sun
- Department of Cardiac Surgery, Zhongshan Hospital, Fudan University, 1069 Xietu Road, 200032, Shanghai, People's Republic of China.
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Romagnoni C, Contino M, Jaworek M, Rosa R, Salurso E, Perico F, Gelpi G, Vismara R, Fiore GB, Mangini A, Antona C. Commissural repositioning in bicuspid aortic valve repair: an in vitro acute model to explore and explain different results. Eur J Cardiothorac Surg 2021; 61:647-654. [PMID: 34363669 DOI: 10.1093/ejcts/ezab359] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Revised: 06/10/2021] [Accepted: 06/17/2021] [Indexed: 11/12/2022] Open
Abstract
OBJECTIVES Commissural orientation <160° is a recognized risk factor for bicuspid aortic valve repair failure. Based on this observation, repairing this subtype of aortic valve by reorienting the 2 commissures at 180° has recently been proposed. METHODS Nine porcine hearts with aortic annulus diameters of 25 mm were selected. A pathological model of a Sievers 1 bicuspid aortic valve was obtained by suturing the coaptation line between the left and right leaflets. Each heart underwent reimplantation procedures both in the native (120°) and the reoriented (180°) configuration. After the operation, each sample was tested on a pulse duplicator at rest (heart rate 60 beats per min) and with mild exercise (heart rate 90 beats per min) conditions. RESULTS No statistically significant difference was noted in mean and peak transvalvular aortic gradients between the 2 configurations at rest (18.6 ± 5 vs 17.5 ± 4 for the mean aortic gradient; 42.8 ± 12.7 vs 36.3 ± 5.8 for the peak aortic gradient) but the group with the 120°-oriented commissures had significantly higher mean transaortic gradients compared to the group with the 180°-oriented commissures at initial exercise stress conditions (30.1 ± 9.1 vs 24.9 ± 3.8; p value 0.002). CONCLUSIONS The 180° commissural reorientation of the asymmetrical bicuspid aortic valve does not improve the transvalvular aortic gradient in an acute model at rest conditions, but it could do so under stress situations. Even if it is surgically more complex and time-consuming, this approach could be a good strategy to improve long-term results, particularly in young patients.
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Affiliation(s)
- Claudia Romagnoni
- Cardiovascular Surgery Department, ASST Fatebenefratelli Sacco, Milano, Italy.,ForcardioLab-Fondazione per la Ricerca in Cardiochirurgia ONLUS, Milano, Italy
| | - Monica Contino
- Cardiovascular Surgery Department, ASST Fatebenefratelli Sacco, Milano, Italy.,ForcardioLab-Fondazione per la Ricerca in Cardiochirurgia ONLUS, Milano, Italy
| | - Michal Jaworek
- ForcardioLab-Fondazione per la Ricerca in Cardiochirurgia ONLUS, Milano, Italy.,Department of Electronics, Information and Bioengineering, Politecnico di Milano, Milano, Italy
| | - Rubina Rosa
- Cardiovascular Surgery Department, ASST Fatebenefratelli Sacco, Milano, Italy.,ForcardioLab-Fondazione per la Ricerca in Cardiochirurgia ONLUS, Milano, Italy
| | - Eleonora Salurso
- ForcardioLab-Fondazione per la Ricerca in Cardiochirurgia ONLUS, Milano, Italy.,Department of Electronics, Information and Bioengineering, Politecnico di Milano, Milano, Italy
| | - Francesca Perico
- ForcardioLab-Fondazione per la Ricerca in Cardiochirurgia ONLUS, Milano, Italy.,Department of Electronics, Information and Bioengineering, Politecnico di Milano, Milano, Italy
| | - Guido Gelpi
- Cardiovascular Surgery Department, ASST Fatebenefratelli Sacco, Milano, Italy.,ForcardioLab-Fondazione per la Ricerca in Cardiochirurgia ONLUS, Milano, Italy.,Department of Electronics, Information and Bioengineering, Politecnico di Milano, Milano, Italy
| | - Riccardo Vismara
- ForcardioLab-Fondazione per la Ricerca in Cardiochirurgia ONLUS, Milano, Italy.,Department of Electronics, Information and Bioengineering, Politecnico di Milano, Milano, Italy
| | - Gianfranco Beniamino Fiore
- ForcardioLab-Fondazione per la Ricerca in Cardiochirurgia ONLUS, Milano, Italy.,Department of Electronics, Information and Bioengineering, Politecnico di Milano, Milano, Italy
| | - Andrea Mangini
- Cardiovascular Surgery Department, ASST Fatebenefratelli Sacco, Milano, Italy.,ForcardioLab-Fondazione per la Ricerca in Cardiochirurgia ONLUS, Milano, Italy
| | - Carlo Antona
- Cardiovascular Surgery Department, ASST Fatebenefratelli Sacco, Milano, Italy.,ForcardioLab-Fondazione per la Ricerca in Cardiochirurgia ONLUS, Milano, Italy.,Università degli Studi di Milano, Milano, Italy
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Abi Akar R, Tence N, Jouan J, Borik W, Menasché P, Fabiani JN, Latremouille C, Achouh P. Ten-year follow-up of unreplaced Valsalva sinuses after aortic valve replacement in bicuspid aortic valve disease. Arch Cardiovasc Dis 2019; 112:305-313. [DOI: 10.1016/j.acvd.2018.11.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Revised: 10/24/2018] [Accepted: 11/15/2018] [Indexed: 10/27/2022]
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de Beaufort HWL, Ferrara A, Conti M, Moll FL, van Herwaarden JA, Figueroa CA, Bismuth J, Auricchio F, Trimarchi S. Comparative Analysis of Porcine and Human Thoracic Aortic Stiffness. Eur J Vasc Endovasc Surg 2018; 55:560-566. [PMID: 29402669 DOI: 10.1016/j.ejvs.2017.12.014] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Accepted: 12/14/2017] [Indexed: 01/06/2023]
Abstract
OBJECTIVES To compare porcine and human thoracic aortic stiffness using the available literature. METHODS The available literature was searched for studies reporting data on porcine or human thoracic aortic mechanical behaviour. A four fibre constitutive model was used to transform the data from included studies. Thus, equi-biaxial stress stretch curves were generated to calculate circumferential and longitudinal aortic stiffness. Analysis was performed separately for the ascending and descending thoracic aorta. Data on human aortic stiffness were divided by age <60 or ≥60 years. Porcine and human aortic stiffness were compared. RESULTS Eleven studies were included, six reported on young porcine aortas, four on human aortas of various ages, and one reported on both. In the ascending aorta, circumferential and longitudinal stiffness were 0.42±0.08 MPa and 0.37±0.06 MPa for porcine aortas (4-9 months) versus 0.55±0.15 MPa and 0.45±0.08 MPa for humans <60 years, and 1.02±0.59 MPa and 1.03±0.54 MPa for humans ≥60 years. In the descending aorta, circumferential and longitudinal stiffness were 0.46±0.03 MPa and 0.44±0.01 MPa for porcine aortas (4-10 months) versus 1.04±0.70 MPa and 1.24±0.76 MPa for humans <60 years, and 3.15±3.31 MPa and 1.17±0.31 MPa for humans ≥60 years. CONCLUSIONS The stiffness of young porcine aortic tissue shows good correspondence with human tissue aged <60 years, especially in the ascending aorta. Young porcine aortic tissue is less stiff than human aortic tissue aged ≥60 years.
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Affiliation(s)
- Hector W L de Beaufort
- Thoracic Aortic Research Centre, IRCCS Policlinico San Donato, San Donato Milanese, Italy
| | - Anna Ferrara
- Department of Civil Engineering and Architecture, University of Pavia, Italy
| | - Michele Conti
- Department of Civil Engineering and Architecture, University of Pavia, Italy
| | - Frans L Moll
- Department of Vascular Surgery, University Medical Centre Utrecht, The Netherlands
| | | | - C Alberto Figueroa
- Departments of Biomedical Engineering and Surgery, University of Michigan, Ann Arbor, USA
| | - Jean Bismuth
- Houston Methodist DeBakey Heart & Vascular Centre, Houston, USA
| | | | - Santi Trimarchi
- Department of Scienze Biomediche per la Salute, University of Milan, Milan, Italy.
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Changes in aortic pulse wave velocity of four thoracic aortic stent grafts in an ex vivo porcine model. PLoS One 2017; 12:e0186080. [PMID: 28982135 PMCID: PMC5642022 DOI: 10.1371/journal.pone.0186080] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Accepted: 09/25/2017] [Indexed: 01/16/2023] Open
Abstract
Objectives Thoracic endovascular aortic repair (TEVAR) has been shown to lead to increased aortic stiffness. The aim of this study was to investigate the effect of stent graft type and stent graft length on aortic stiffness in a controlled, experimental setting. Methods Twenty porcine thoracic aortas were connected to a pulsatile mock loop system. Intraluminal pressure was recorded at two sites in order to measure pulse wave velocity (PWV) for each aorta: before stent graft deployment (t1); after deployment of a 100-mm long stent graft (t2); and after distal extension through deployment of a second 100-mm long stent graft (t3). Four different types of stent grafts (Conformable Gore® TAG® Device, Bolton Relay® Device, Cook Zenith Alpha™, and Medtronic Valiant®) were evaluated. Results For the total cohort of 20 aortas, PWV increased by a mean 0.6 m/s or 8.9% of baseline PWV after deployment of a 100-mm proximal stent graft (P<0.001), and by a mean 1.4 m/s or 23.0% of baseline PWV after distal extension of the stent graft (P<0.001). Univariable regression analysis showed a significant correlation between aortic PWV and extent of stent graft coverage, (P<0.001), but no significant effect of baseline aortic length, baseline aortic PWV, or stent graft type on the percentual increase in PWV at t2 or at t3. Conclusions In this experimental set-up, aortic stiffness increased significantly after stent graft deployment with each of the four types of stent graft, with the increase in aortic stiffness depending on the extent of stent graft coverage.
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Stent-Graft Deployment Increases Aortic Stiffness in an Ex Vivo Porcine Model. Ann Vasc Surg 2017; 43:302-308. [DOI: 10.1016/j.avsg.2017.04.024] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Accepted: 04/07/2017] [Indexed: 11/24/2022]
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