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Faza NN, Harb SC, Wang DD, van den Dorpel MMP, Van Mieghem N, Little SH. Physical and Computational Modeling for Transcatheter Structural Heart Interventions. JACC Cardiovasc Imaging 2024; 17:428-440. [PMID: 38569793 DOI: 10.1016/j.jcmg.2024.01.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 01/10/2024] [Accepted: 01/11/2024] [Indexed: 04/05/2024]
Abstract
Structural heart disease interventions rely heavily on preprocedural planning and simulation to improve procedural outcomes and predict and prevent potential procedural complications. Modeling technologies, namely 3-dimensional (3D) printing and computational modeling, are nowadays increasingly used to predict the interaction between cardiac anatomy and implantable devices. Such models play a role in patient education, operator training, procedural simulation, and appropriate device selection. However, current modeling is often limited by the replication of a single static configuration within a dynamic cardiac cycle. Recognizing that health systems may face technical and economic limitations to the creation of "in-house" 3D-printed models, structural heart teams are pivoting to the use of computational software for modeling purposes.
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Affiliation(s)
- Nadeen N Faza
- Houston Methodist DeBakey Heart and Vascular Center, Houston, Texas, USA
| | | | | | | | | | - Stephen H Little
- Houston Methodist DeBakey Heart and Vascular Center, Houston, Texas, USA.
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Jabbour RJ, Curzen N. How long will my TAVI valve last, doctor? Expert Rev Cardiovasc Ther 2023; 21:721-724. [PMID: 37883125 DOI: 10.1080/14779072.2023.2276366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Accepted: 10/24/2023] [Indexed: 10/27/2023]
Affiliation(s)
- Richard J Jabbour
- Wessex Cardiothoracic Centre, Cardiology, University Hospital Southampton NHS Foundation Trust, Southampton, UK
- Faculty of Medicine, University of Southampton, Southampton, UK
| | - Nick Curzen
- Wessex Cardiothoracic Centre, Cardiology, University Hospital Southampton NHS Foundation Trust, Southampton, UK
- Faculty of Medicine, University of Southampton, Southampton, UK
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Kohli K, Wei ZA, Sadri V, Siefert AW, Blanke P, Perdoncin E, Greenbaum AB, Khan JM, Lederman RJ, Babaliaros VC, Yoganathan AP, Oshinski JN. Assessing the Hemodynamic Impact of Anterior Leaflet Laceration in Transcatheter Mitral Valve Replacement: An in silico Study. Front Cardiovasc Med 2022; 9:869259. [PMID: 35811698 PMCID: PMC9261975 DOI: 10.3389/fcvm.2022.869259] [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: 02/04/2022] [Accepted: 04/22/2022] [Indexed: 11/20/2022] Open
Abstract
Background A clinical study comparing the hemodynamic outcomes of transcatheter mitral valve replacement (TMVR) with vs. without Laceration of the Anterior Mitral leaflet to Prevent Outflow Obstruction (LAMPOON) has never been designed nor conducted. Aims To quantify the hemodynamic impact of LAMPOON in TMVR using patient-specific computational (in silico) models. Materials Eight subjects from the LAMPOON investigational device exemption trial were included who had acceptable computed tomography (CT) data for analysis. All subjects were anticipated to be at prohibitive risk of left ventricular outflow tract (LVOT) obstruction from TMVR, and underwent successful LAMPOON immediately followed by TMVR. Using post-procedure CT scans, two 3D anatomical models were created for each subject: (1) TMVR with LAMPOON (performed procedure), and (2) TMVR without LAMPOON (virtual control). A validated computational fluid dynamics (CFD) paradigm was then used to simulate the hemodynamic outcomes for each condition. Results LAMPOON exposed on average 2 ± 0.6 transcatheter valve cells (70 ± 20 mm2 total increase in outflow area) which provided an additional pathway for flow into the LVOT. As compared to TMVR without LAMPOON, TMVR with LAMPOON resulted in lower peak LVOT velocity, lower peak LVOT gradient, and higher peak LVOT effective orifice area by 0.4 ± 0.3 m/s (14 ± 7% improvement, p = 0.006), 7.6 ± 10.9 mmHg (31 ± 17% improvement, p = 0.01), and 0.2 ± 0.1 cm2 (17 ± 9% improvement, p = 0.002), respectively. Conclusion This was the first study to permit a quantitative, patient-specific comparison of LVOT hemodynamics following TMVR with and without LAMPOON. The LAMPOON procedure achieved a critical increment in outflow area which was effective for improving LVOT hemodynamics, particularly for subjects with a small neo-left ventricular outflow tract (neo-LVOT).
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Affiliation(s)
- Keshav Kohli
- Wallace H. Coulter Department of Biomedical Engineering at the Georgia Institute of Technology and Emory University, Atlanta, GA, United States
- *Correspondence: Keshav Kohli,
| | - Zhenglun Alan Wei
- Wallace H. Coulter Department of Biomedical Engineering at the Georgia Institute of Technology and Emory University, Atlanta, GA, United States
- Department of Biomedical Engineering, University of Massachusetts Lowell, Lowell, MA, United States
| | - Vahid Sadri
- Wallace H. Coulter Department of Biomedical Engineering at the Georgia Institute of Technology and Emory University, Atlanta, GA, United States
| | - Andrew W. Siefert
- Wallace H. Coulter Department of Biomedical Engineering at the Georgia Institute of Technology and Emory University, Atlanta, GA, United States
| | - Philipp Blanke
- Department of Radiology, St. Paul’s Hospital, The University of British Columbia, Vancouver, BC, Canada
| | - Emily Perdoncin
- Structural Heart and Valve Center, Emory University Hospital, Atlanta, GA, United States
| | - Adam B. Greenbaum
- Structural Heart and Valve Center, Emory University Hospital, Atlanta, GA, United States
| | - Jaffar M. Khan
- Cardiovascular Branch, Division of Intramural Research, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD, United States
| | - Robert J. Lederman
- Cardiovascular Branch, Division of Intramural Research, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD, United States
| | - Vasilis C. Babaliaros
- Structural Heart and Valve Center, Emory University Hospital, Atlanta, GA, United States
| | - Ajit P. Yoganathan
- Wallace H. Coulter Department of Biomedical Engineering at the Georgia Institute of Technology and Emory University, Atlanta, GA, United States
| | - John N. Oshinski
- Wallace H. Coulter Department of Biomedical Engineering at the Georgia Institute of Technology and Emory University, Atlanta, GA, United States
- Department of Radiology and Imaging Science, Emory University School of Medicine, Atlanta, GA, United States
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