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Vis A, Arfaee M, Khambati H, Slaughter MS, Gummert JF, Overvelde JTB, Kluin J. The ongoing quest for the first total artificial heart as destination therapy. Nat Rev Cardiol 2022; 19:813-828. [PMID: 35668176 DOI: 10.1038/s41569-022-00723-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 05/09/2022] [Indexed: 12/18/2022]
Abstract
Many patients with end-stage heart disease die because of the scarcity of donor hearts. A total artificial heart (TAH), an implantable machine that replaces the heart, has so far been successfully used in over 1,700 patients as a temporary life-saving technology for bridging to heart transplantation. However, after more than six decades of research on TAHs, a TAH that is suitable for destination therapy is not yet available. High complication rates, bulky devices, poor durability, poor biocompatibility and low patient quality of life are some of the major drawbacks of current TAH devices that must be addressed before TAHs can be used as a destination therapy. Quickly emerging innovations in battery technology, wireless energy transmission, biocompatible materials and soft robotics are providing a promising opportunity for TAH development and might help to solve the drawbacks of current TAHs. In this Review, we describe the milestones in the history of TAH research and reflect on lessons learned during TAH development. We summarize the differences in the working mechanisms of these devices, discuss the next generation of TAHs and highlight emerging technologies that will promote TAH development in the coming decade. Finally, we present current challenges and future perspectives for the field.
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Affiliation(s)
- Annemijn Vis
- Cardiothoracic Surgery, Amsterdam UMC location University of Amsterdam, Amsterdam, The Netherlands.,Heart Failure and Arrhythmias, Amsterdam Cardiovascular Sciences, Amsterdam, The Netherlands
| | - Maziar Arfaee
- Cardiothoracic Surgery, Amsterdam UMC location University of Amsterdam, Amsterdam, The Netherlands.,Heart Failure and Arrhythmias, Amsterdam Cardiovascular Sciences, Amsterdam, The Netherlands
| | - Husain Khambati
- Cardiothoracic Surgery, Amsterdam UMC location University of Amsterdam, Amsterdam, The Netherlands.,Heart Failure and Arrhythmias, Amsterdam Cardiovascular Sciences, Amsterdam, The Netherlands
| | - Mark S Slaughter
- Department of Cardiovascular and Thoracic Surgery, University of Louisville, Louisville, KY, USA
| | - Jan F Gummert
- Department of Thoracic and Cardiovascular Surgery, Heart and Diabetes Center NRW, Ruhr-University Bochum, Bad Oeynhausen, Germany
| | - Johannes T B Overvelde
- Autonomous Matter Department, AMOLF, Amsterdam, The Netherlands.,Institute for Complex Molecular Systems and Department of Mechanical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Jolanda Kluin
- Cardiothoracic Surgery, Amsterdam UMC location University of Amsterdam, Amsterdam, The Netherlands. .,Heart Failure and Arrhythmias, Amsterdam Cardiovascular Sciences, Amsterdam, The Netherlands.
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Cappon F, Wu T, Papaioannou T, Du X, Hsu PL, Khir AW. Mock circulatory loops used for testing cardiac assist devices: A review of computational and experimental models. Int J Artif Organs 2021; 44:793-806. [PMID: 34581613 DOI: 10.1177/03913988211045405] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Heart failure is a major health risk, and with limited availability of donor organs, there is an increasing need for developing cardiac assist devices (CADs). Mock circulatory loops (MCL) are an important in-vitro test platform for CAD's performance assessment and optimisation. The MCL is a lumped parameter model constructed out of hydraulic and mechanical components aiming to simulate the native cardiovascular system (CVS) as closely as possible. Further development merged MCLs and numerical circulatory models to improve flexibility and accuracy of the system; commonly known as hybrid MCLs. A total of 128 MCLs were identified in a literature research until 25 September 2020. It was found that the complexity of the MCLs rose over the years, recent MCLs are not only capable of mimicking the healthy and pathological conditions, but also implemented cerebral, renal and coronary circulations and autoregulatory responses. Moreover, the development of anatomical models made flow visualisation studies possible. Mechanical MCLs showed excellent controllability and repeatability, however, often the CVS was overly simplified or lacked autoregulatory responses. In numerical MCLs the CVS is represented with a higher order of lumped parameters compared to mechanical test rigs, however, complex physiological aspects are often simplified. In hybrid MCLs complex physiological aspects are implemented in the hydraulic part of the system, whilst the numerical model represents parts of the CVS that are too difficult to represent by mechanical components per se. This review aims to describe the advances, limitations and future directions of the three types of MCLs.
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Affiliation(s)
- Femke Cappon
- Department of Mechanical and Aerospace Engineering, Brunel University London, Uxbridge, UK
| | - Tingting Wu
- Department of Mechanical and Electrical Engineering, Soochow University, Suzhou, China
| | - Theodore Papaioannou
- Biomedical Engineering Unit, First Department of Cardiology, Medical School, National and Kapodistrian University of Athens, Zografou, Greece
| | - Xinli Du
- Department of Mechanical and Aerospace Engineering, Brunel University London, Uxbridge, UK
| | - Po-Lin Hsu
- Department of Mechanical and Electrical Engineering, Soochow University, Suzhou, China
| | - Ashraf W Khir
- Department of Mechanical and Aerospace Engineering, Brunel University London, Uxbridge, UK
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