1
|
Belahnech Y, Martí Aguasca G, Dos Subirà L. Advances in Diagnostic and Interventional Catheterization in Adults with Fontan Circulation. J Clin Med 2024; 13:4633. [PMID: 39200775 PMCID: PMC11355634 DOI: 10.3390/jcm13164633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2024] [Revised: 07/19/2024] [Accepted: 08/05/2024] [Indexed: 09/02/2024] Open
Abstract
Over the past five decades, the Fontan procedure has been developed to improve the life expectancy of patients with congenital heart defects characterized by a functionally single ventricle. The Fontan circulation aims at redirecting systemic venous return to the pulmonary circulation in the absence of an impelling subpulmonary ventricle, which makes this physiology quite fragile and leads to several long-term complications. Despite the importance of hemodynamic assessment through cardiac catheterization in the management and follow-up of these patients, a thorough understanding of the ultimate functioning of this type of circulation is lacking, and the interpretation of the hemodynamic data is often complex. In recent years, new tools such as combined catheterization with cardiopulmonary exercise testing have been incorporated to improve the understanding of the hemodynamic profile of these patients. Furthermore, extensive percutaneous treatment options have been developed, addressing issues ranging from obstructive problems in Fontan pathway and acquired shunts through compensatory collaterals to the percutaneous treatment of lymphatic circulation disorders and transcatheter edge-to-edge repair of atrioventricular valves. The aim of this review is to detail the various tools used in cardiac catheterization for patients with Fontan circulation, analyze different percutaneous treatment strategies, and discuss the latest advancements in this field.
Collapse
Affiliation(s)
- Yassin Belahnech
- Adult Congenital Heart Disease Unit, Cardiology Department, Vall d’Hebron University Hospital, Vall d’Hebron Research Institute, Universitat Autònoma de Barcelona, 08035 Barcelona, Spain; (Y.B.); (G.M.A.)
| | - Gerard Martí Aguasca
- Adult Congenital Heart Disease Unit, Cardiology Department, Vall d’Hebron University Hospital, Vall d’Hebron Research Institute, Universitat Autònoma de Barcelona, 08035 Barcelona, Spain; (Y.B.); (G.M.A.)
- Centro de Investigación Biomédica en Red en Enfermedades Cardiovasculares (CIBERCV), Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Laura Dos Subirà
- Adult Congenital Heart Disease Unit, Cardiology Department, Vall d’Hebron University Hospital, Vall d’Hebron Research Institute, Universitat Autònoma de Barcelona, 08035 Barcelona, Spain; (Y.B.); (G.M.A.)
- Centro de Investigación Biomédica en Red en Enfermedades Cardiovasculares (CIBERCV), Instituto de Salud Carlos III, 28029 Madrid, Spain
- European Reference Network for Rare, Low-Prevalence, or Complex Diseases of the Heart (ERN GUARD-Heart), Coordinating Center in Amsterdam, 1105 AZ Amsterdam, The Netherlands
| |
Collapse
|
2
|
Jalal Z, Langouet E, Dib N, Le-Quellenec S, Mostefa-Kara M, Martin A, Roubertie F, Thambo JB. Role and Applications of Experimental Animal Models of Fontan Circulation. J Clin Med 2024; 13:2601. [PMID: 38731130 PMCID: PMC11084605 DOI: 10.3390/jcm13092601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Revised: 04/17/2024] [Accepted: 04/26/2024] [Indexed: 05/13/2024] Open
Abstract
Over the last four decades, the Fontan operation has been the treatment of choice for children born with complex congenital heart diseases and a single-ventricle physiology. However, therapeutic options remain limited and despite ongoing improvements in initial surgical repair, patients still experience a multiplicity of cardiovascular complications. The causes for cardiovascular failure are multifactorial and include systemic ventricular dysfunction, pulmonary vascular resistance, atrioventricular valve regurgitation, arrhythmia, development of collaterals, protein-losing enteropathy, hepatic dysfunction, and plastic bronchitis, among others. The mechanisms leading to these late complications remain to be fully elucidated. Experimental animal models have been developed as preclinical steps that enable a better understanding of the underlying pathophysiology. They furthermore play a key role in the evaluation of the efficacy and safety of new medical devices prior to their use in human clinical studies. However, these experimental models have several limitations. In this review, we aim to provide an overview of the evolution and progress of the various types of experimental animal models used in the Fontan procedure published to date in the literature. A special focus is placed on experimental studies performed on animal models of the Fontan procedure with or without mechanical circulatory support as well as a description of their impact in the evolution of the Fontan design. We also highlight the contribution of animal models to our understanding of the pathophysiology and assess forthcoming developments that may improve the contribution of animal models for the testing of new therapeutic solutions.
Collapse
Affiliation(s)
- Zakaria Jalal
- Department of Pediatric and Adult Congenital Cardiology, University Hospital of Bordeaux, 33600 Pessac, France; (N.D.); (F.R.); (J.-B.T.)
- LIRYC Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, 33600 Pessac, France
- Centre de Recherche Cardio-Thoracique de Bordeaux, INSERM U1045, 33600 Pessac, France
| | - Elise Langouet
- Department of Pediatric and Adult Congenital Cardiology Anesthesiology, University Hospital of Bordeaux, 33600 Pessac, France;
| | - Nabil Dib
- Department of Pediatric and Adult Congenital Cardiology, University Hospital of Bordeaux, 33600 Pessac, France; (N.D.); (F.R.); (J.-B.T.)
- LIRYC Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, 33600 Pessac, France
- Centre de Recherche Cardio-Thoracique de Bordeaux, INSERM U1045, 33600 Pessac, France
| | | | - Mansour Mostefa-Kara
- Adult Congenital Heart Disease Medico-Surgical Unit, European Georges Pompidou Hospital, 75015 Paris, France;
| | - Amandine Martin
- Department of Cardiac Surgery, University Hospital, 97400 Saint-Denis, France;
| | - François Roubertie
- Department of Pediatric and Adult Congenital Cardiology, University Hospital of Bordeaux, 33600 Pessac, France; (N.D.); (F.R.); (J.-B.T.)
- LIRYC Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, 33600 Pessac, France
- Centre de Recherche Cardio-Thoracique de Bordeaux, INSERM U1045, 33600 Pessac, France
| | - Jean-Benoît Thambo
- Department of Pediatric and Adult Congenital Cardiology, University Hospital of Bordeaux, 33600 Pessac, France; (N.D.); (F.R.); (J.-B.T.)
- LIRYC Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, 33600 Pessac, France
- Centre de Recherche Cardio-Thoracique de Bordeaux, INSERM U1045, 33600 Pessac, France
| |
Collapse
|
3
|
Pradegan N, Lena T, Tessari C, Gallo M, Tarzia V, Guariento A, Padalino M, Vida V, Gerosa G. Current Understanding and Future Directions of Transcatheter Devices to Assist Failing Fontan. JOURNAL OF THE SOCIETY FOR CARDIOVASCULAR ANGIOGRAPHY & INTERVENTIONS 2024; 3:101334. [PMID: 39130169 PMCID: PMC11307829 DOI: 10.1016/j.jscai.2024.101334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 01/06/2024] [Accepted: 01/22/2024] [Indexed: 08/13/2024]
Abstract
Even if the Fontan operation is the surgical treatment of choice in patients with univentricular physiology, it remains a palliative strategy. Consequently, when Fontan patients reach adulthood, the majority of them develop late clinical sequelae of a failing cavo-pulmonary circuit (eg, liver failure, protein-losing enteropathy, and arrhythmias). Although heart transplantation represents the gold standard to treat this condition, Fontan patients usually accede to this therapy late, when risk of mortality is significantly increased, and a shortage of donor hearts limits transplantation in this special population. Mechanical circulatory support is an emerging field, but it is still in the experimental stage. Current mechanical circulatory devices have been used in Fontan circulation but are associated with the need for high-risk redo surgery. Percutaneous pumps are an emerging field that is still under investigation, with multiple prototypes developed. This review aims to analyze the hemodynamic profile of the developed intravascular pumps and their application in the preclinical scenario in the Fontan circulation.
Collapse
Affiliation(s)
- Nicola Pradegan
- Cardiac Surgery Unit, Heart Transplant and MCS Program, Cardio-thoracic-vascular and Public Health Department, Padova University Hospital, Padova, Italy
| | - Tea Lena
- Cardiac Surgery Unit, Heart Transplant and MCS Program, Cardio-thoracic-vascular and Public Health Department, Padova University Hospital, Padova, Italy
| | - Chiara Tessari
- Cardiac Surgery Unit, Heart Transplant and MCS Program, Cardio-thoracic-vascular and Public Health Department, Padova University Hospital, Padova, Italy
| | - Michele Gallo
- Department of Cardiothoracic Surgery, University of Louisville, Louisville, Kentucky
| | - Vincenzo Tarzia
- Cardiac Surgery Unit, Cardio-Thoracic-Vascular and Public Health Department, University of Padova, Podova, Italy
| | - Alvise Guariento
- Pediatric Cardiac Surgery and Congenital Heart Disease Unit, Cardio-Thoracic-Vascular and Public Health Department, Padova University Hospital, Padova, Italy
| | - Massimo Padalino
- Pediatric Cardiac Surgery and Congenital Heart Disease Unit, Cardio-Thoracic-Vascular and Public Health Department, Padova University Hospital, Padova, Italy
| | - Vladimiro Vida
- Pediatric Cardiac Surgery and Congenital Heart Disease Unit, Cardio-Thoracic-Vascular and Public Health Department, Padova University Hospital, Padova, Italy
| | - Gino Gerosa
- Cardiac Surgery Unit, Heart Transplant and MCS Program, Cardio-thoracic-vascular and Public Health Department, Padova University Hospital, Padova, Italy
| |
Collapse
|
4
|
Chen T, Cheng X, Liu X, Zhang H, Wang S. Study on the optimal elastic modulus of flexible blades for right heart assist device supporting patients with single-ventricle physiologies. Front Cardiovasc Med 2024; 11:1377765. [PMID: 38590697 PMCID: PMC10999545 DOI: 10.3389/fcvm.2024.1377765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2024] [Accepted: 03/11/2024] [Indexed: 04/10/2024] Open
Abstract
Background Patients with single-ventricle physiologies continue to experience insufficient circulatory power after undergoing palliative surgeries. This paper proposed a right heart assist device equipped with flexible blades to provide circulatory assistance for these patients. The optimal elastic modulus of the flexible blades was investigated through numerical simulation. Methods A one-way fluid-structure interaction (FSI) simulation was employed to study the deformation of flexible blades during rotation and its impact on device performance. The process began with a computational fluid dynamics (CFD) simulation to calculate the blood pressure rise and the pressure on the blades' surface. Subsequently, these pressure data were exported for finite element analysis (FEA) to compute the deformation of the blades. The fluid domain was then recreated based on the deformed blades' shape. Iterative CFD and FEA simulations were performed until both the blood pressure rise and the blades' shape stabilized. The blood pressure rise, hemolysis risk, and thrombosis risk corresponding to blades with different elastic moduli were exhaustively evaluated to determine the optimal elastic modulus. Results Except for the case at 8,000 rpm with a blade elastic modulus of 40 MPa, the pressure rise associated with flexible blades within the studied range (rotational speeds of 4,000 rpm and 8,000 rpm, elastic modulus between 10 MPa and 200 MPa) was lower than that of rigid blades. It was observed that the pressure rise corresponding to flexible blades increased as the elastic modulus increased. Additionally, no significant difference was found in the hemolysis risk and thrombus risk between flexible blades of various elastic moduli and rigid blades. Conclusion Except for one specific case, deformation of the flexible blades within the studied range led to a decrease in the impeller's functionality. Notably, rotational speed had a more significant impact on hemolysis risk and thrombus risk compared to blade deformation. After a comprehensive analysis of blade compressibility, blood pressure rise, hemolysis risk, and thrombus risk, the optimal elastic modulus for the flexible blades was determined to be between 40 MPa and 50 MPa.
Collapse
Affiliation(s)
- Tong Chen
- Academy for Engineering and Technology, Fudan University, Shanghai, China
| | - Xiaoming Cheng
- Department of Aeronautics and Astronautics, Fudan University, Shanghai, China
| | - Xudong Liu
- Shanghai Key Laboratory of Interventional Medical Devices and Equipment, Shanghai MicroPort Medical Group Co., Ltd, Shanghai, China
| | - Huifeng Zhang
- Department of Cardiothoracic Surgery, Children’s Hospital of Fudan University, Shanghai, China
| | - Shengzhang Wang
- Academy for Engineering and Technology, Fudan University, Shanghai, China
- Department of Aeronautics and Astronautics, Fudan University, Shanghai, China
| |
Collapse
|
5
|
Şişli E, Yıldırım C, Aka İB, Tuncer ON, Atay Y, Özbaran M, Pekkan K. Switching the Left and the Right Hearts: A Novel Bi-ventricle Mechanical Support Strategy with Spared Native Single-Ventricle. Ann Biomed Eng 2023; 51:2853-2872. [PMID: 37635154 DOI: 10.1007/s10439-023-03348-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Accepted: 08/09/2023] [Indexed: 08/29/2023]
Abstract
End-stage Fontan patients with single-ventricle (SV) circulation are often bridged-to-heart transplantation via mechanical circulatory support (MCS). Donor shortage and complexity of the SV physiology demand innovative MCS. In this paper, an out-of-the-box circulation concept, in which the left and right ventricles are switched with each other is introduced as a novel bi-ventricle MCS configuration for the "failing" Fontan patients. In the proposed configuration, the systemic circulation is maintained through a conventional mechanical ventricle assist device (VAD) while the venous circulation is delegated to the native SV. This approach spares the SV and puts it to a new use at the right-side providing the most-needed venous flow pulsatility to the failed Fontan circulation. To analyze its feasibility and performance, eight SV failure modes have been studied via an established multi-compartmental lumped parameter cardiovascular model (LPM). Here the LPM model is experimentally validated against the corresponding pulsatile mock-up flow loop measurements of a representative 15-year-old Fontan patient employing a clinically-approved VAD (Medtronic-HeartWare). The proposed surgical configuration maintained the healthy cardiac index (3-3.5 l/min/m2) and the normal mean systemic arterial pressure levels. For a failed SV with low ejection fraction (EF = 26%), representing a typical systemic Fontan failure, the proposed configuration enabled a ~ 28 mmHg amplitude in the venous/pulmonary waveforms and a 2 mmHg decrease in the central venous pressure (CVP) together with acceptable mean pulmonary artery pressures (17.5 mmHg). The pulmonary vascular resistance (PVR)-SV failure case provided a ~ 5 mmHg drop in the CVP, with venous/pulmonary pulsatility reaching to ~ 22 mmHg. For the high PVR failure case with a healthy SV (EF = 44%) pulmonary hypertension is likely to occur as expected. While this condition is routinely encountered during the heart transplantation and managed through pulmonary vasodilators a need for precise functional assessment of the spared failed-ventricle is recommended if utilized in the PVR failure mode. Comprehensive in vitro and in silico results encourage this novel concept as a low-cost, more physiological alternative to the conventional bi-ventricle MCS pending animal experiments.
Collapse
Affiliation(s)
- Emrah Şişli
- Pediatric Cardiovascular Surgery, Department of Cardiovascular Surgery, Osmangazi University Faculty of Medicine, Büyükdere District, Campus of Meşelik, Tepebaşı, 26480, Eskisehir, Turkey.
| | - Canberk Yıldırım
- Department of Biomedical Sciences and Engineering, Koç University, Istanbul, Turkey
| | - İbrahim Başar Aka
- Department of Mechatronics Engineering, İstanbul Bilgi University, Istanbul, Turkey
| | - Osman Nuri Tuncer
- Pediatric Cardiovascular Surgery, Department of Cardiovascular Surgery, Ege University Faculty of Medicine, Izmir, Turkey
| | - Yüksel Atay
- Pediatric Cardiovascular Surgery, Department of Cardiovascular Surgery, Ege University Faculty of Medicine, Izmir, Turkey
| | - Mustafa Özbaran
- Heart Transplantation, Department of Cardiovascular Surgery, Ege University Faculty of Medicine, Izmir, Turkey
| | - Kerem Pekkan
- Department of Mechanical Engineering, Koç University, Rumeli Feneri Campus, Sarıyer, Istanbul, Turkey.
| |
Collapse
|
6
|
Li L, Wang J, Zhao G, Topaz S, Morales D, Yoganathan A, Ballard-Croft C, Zwischenberger JB, Wang D. Percutaneous Cavopulmonary Assist: From Design to 96 Hour Survival in Lethal Cavopulmonary Failure Sheep. ASAIO J 2023; 69:802-808. [PMID: 37084284 DOI: 10.1097/mat.0000000000001939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/23/2023] Open
Abstract
We are developing a clinically practical percutaneous double lumen cannula (DLC)-based cavopulmonary assist (CPA) system to support failing Fontan patients. In this study, our CPA DLC was redesigned for even blood flow, minimal recirculation, and easy insertion/deployment. After bench testing, this new CPA system was evaluated for 4 hours (n = 10) and 96 hours (n = 5) in our clinically relevant lethal cavopulmonary failure (CPF) sheep model for ease of cannulation/deployment, reversal of CPF hemodynamics/end-organ hypoperfusion, and durability/biocompatibility. Cavopulmonary failure was achieved in all sheep. All DLCs were successfully inserted/deployed into Fontan anatomy. Cavopulmonary assist reversed CPF with normalized central venous pressure and cardiac output. All survival sheep were ambulatory with normal eating/drinking. One sheep was euthanized after 6 hours from cannula kinking, and one sheep died of hypokalemia after 8 hours. Three sheep survived 96 hours with normal hemodynamics. Free hemoglobin was only 3.7 ± 1.2 mg/dl at 96 hours, indicating negligible hemolysis. Creatinine, blood urea nitrogen, and lactate increased from hypoperfusion but normalized by 72 hours CPA. Necropsy showed only a small, immobilized thrombus ring at umbrella attachment to DLC. Our DLC-based system provided total ambulatory CPA in a lethal CPF sheep model with 96 hour survival and complete reversal of hemodynamics and end-organ hypoperfusion.
Collapse
Affiliation(s)
- Li Li
- From the Department of Surgery, University of Kentucky, Lexington, Kentucky
| | - Jingkun Wang
- From the Department of Surgery, University of Kentucky, Lexington, Kentucky
| | | | | | - David Morales
- Department of Pediatric Cardiovascular Surgery, Cincinnati Children's Hospital, Cincinnati, Ohio
| | - Ajit Yoganathan
- Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, Georgia
| | | | | | - Dongfang Wang
- From the Department of Surgery, University of Kentucky, Lexington, Kentucky
| |
Collapse
|
7
|
Zwischenberger JB, Breetz KA, Ballard-Croft C, Wang D. Failing Fontan cardiovascular support: Review. J Card Surg 2022; 37:5257-5261. [PMID: 36321714 PMCID: PMC9812883 DOI: 10.1111/jocs.17094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Accepted: 09/17/2022] [Indexed: 11/06/2022]
Abstract
BACKGROUND Although all congenital heart defects (CHD) present unique challenges, univentricular CHD are especially challenging given the difficulty of passively perfusing pulmonary blood flow. Three surgical procedures are required within the first years of life, with the final completing a Fontan circulation in which the inferior vena cava is connected to the pulmonary artery and previously connected superior vena cava. This allows passive venous return to the pulmonary circulation then flow into the single ventricle for systemic circulation. METHODS Although a Fontan provides successful palliation for two to three decades, many complications can arise as pulmonary resistance must remain low to allow adequate forward flow. Eventually, the failing Fontan circulation requires temporary support as the patient awaits a heart transplant. We reviewed PubMed, Google Scholar, and U. Kentucky library for different techniques evaluated to support a failing Fontan circulation. RESULTS Multiple technologies have been developed as a bridge to transplant to decrease morbidity. Innovative types of extracorporeal membrane oxygenation, ventricular assist devices, and total artificial hearts have been attempted in laboratory settings as well as in Fontan patients with varying degrees of success. This article emphasizes the strengths and weaknesses of each technology in the context of Fontan physiology. CONCLUSION The end game for these patients remains a heart transplant. Without easy access to donors, each of the options discussed is a potential bridge to limit morbidity and mortality until a suitable donor heart becomes available.
Collapse
Affiliation(s)
| | | | | | - Dongfang Wang
- University of Kentucky, Department of Surgery, Division of Surgical Research
| |
Collapse
|
8
|
Li L, Wang J, Zhao G, Topaz S, Morales D, Yoganathan A, Ballard-Croft C, Zwischenberger JB, Wang D. Percutaneous DLC-Based Total Cavopulmonary Assist Achieves 96-Hour Survival in Lethal Cavopulmonary Failure Sheep. J Am Coll Cardiol 2021; 78:538-540. [PMID: 34325844 DOI: 10.1016/j.jacc.2021.06.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 05/17/2021] [Accepted: 06/02/2021] [Indexed: 01/07/2023]
|
9
|
Computational fluid dynamic simulations of a cavopulmonary assist device for failing Fontan circulation. J Thorac Cardiovasc Surg 2019; 158:1424-1433.e5. [PMID: 31005303 DOI: 10.1016/j.jtcvs.2019.03.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Revised: 01/13/2019] [Accepted: 03/02/2019] [Indexed: 01/23/2023]
Abstract
OBJECTIVES Adult patients who have undergone the Fontan procedure are highly vulnerable to gradual, progressive circulatory failure, and options to reverse this situation are few. A cavopulmonary assist device could decongest the venous and lymphatic systems, overcome elevated pulmonary vascular resistance, increase cardiac output, and support some of these patients to heart transplant. This study characterizes the performance and challenges of a novel multilumen cannula coupled to an external blood pump proposed as a potential Fontan cavopulmonary assist strategy. METHODS Computational fluid dynamic simulations were conducted for 3 extracardiac Fontan geometries consisting of 1 idealized model and 2 patient-specific models. A range of physiologic flow rates and pump assist levels were simulated to calculate the pressure gain provided by the multilumen cannula. Hemolysis index was estimated for the idealized model with Lagrangian particle tracking and 2 variations of the power-law. Wall shear stresses were also examined. RESULTS Pressure gains up to 4 and 9 mm Hg were achieved for the idealized and patient-specific models, respectively. Pressure gains increased with both higher cardiac output and larger pump intake through the external pump. Flow-weighted hemolysis show hemoglobin damage levels to be several times lower than the 2% threshold at the highest pump intake flow cases. Wall shear stress predictions depict elevated areas in the pulmonary vessels and regions of the cannula device. CONCLUSIONS The cannula tested in this study shows promise as a percutaneous option to bridge support in some patients with a failing extracardiac Fontan. Limitations identified will be addressed in future design iterations and in ongoing experimental tests.
Collapse
|
10
|
Van Puyvelde J, Rega F, Minami T, Claus P, Cools B, Gewillig M, Meyns B. Creation of the Fontan circulation in sheep: a survival model. Interact Cardiovasc Thorac Surg 2019; 29:15-21. [DOI: 10.1093/icvts/ivz022] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Revised: 12/30/2018] [Accepted: 01/13/2019] [Indexed: 11/13/2022] Open
Affiliation(s)
- Joeri Van Puyvelde
- Department of Cardiac Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Filip Rega
- Department of Cardiac Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Tomoyuki Minami
- Department of Cardiac Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Piet Claus
- Department of Cardiovascular Imaging and Dynamics, University Hospitals Leuven, Leuven, Belgium
| | - Bjorn Cools
- Department of Paediatric Cardiology, University Hospitals Leuven, Leuven, Belgium
| | - Marc Gewillig
- Department of Paediatric Cardiology, University Hospitals Leuven, Leuven, Belgium
| | - Bart Meyns
- Department of Cardiac Surgery, University Hospitals Leuven, Leuven, Belgium
| |
Collapse
|
11
|
Granegger M, Valencia A, Quandt D, Dave H, Kretschmar O, Hübler M, Schweiger M. Approaches to Establish Extracardiac Total Cavopulmonary Connections in Animal Models—A Review. World J Pediatr Congenit Heart Surg 2019; 10:81-89. [DOI: 10.1177/2150135118802788] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Background: Long-term survival of patients with a single ventricle palliated with a Fontan procedure is still limited. No curative treatment options are available. To investigate the pathophysiology and potential treatment options, such as mechanical circulatory support (MCS), appropriate large animal models are required. The aim of this review was to analyze all full-text manuscripts presenting approaches for an extracardiac total cavopulmonary connection (TCPC) animal model to identify the feasibility and limitations in the acute and chronic setting. Methods: A literature search was performed for full-text publications presenting large animal models with extracardiac TCPCs on Pubmed and Embase. Out of 454 reviewed papers, 23 manuscripts fulfilled the inclusion criteria. Surgical procedures were categorized and hemodynamic changes at the transition from the biventricular to the univentricular condition analyzed. Results: Surgical procedures varied especially regarding coronary venous flow handling and anatomic shape of the TCPC. In most studies (n = 14), the main pulmonary artery was clamped and the coronary venous flow redirected by additional surgical interventions. Only in five reports, the caval veins were connected to the right pulmonary artery to create a true TCPC shape, whereas in all others (n = 18), the veins were connected to the main pulmonary artery. An elevated pulmonary vascular resistance was identified as a limiting hemodynamic factor for TCPC completion in healthy animals. Conclusions: A variety of acute TCPC animal models were successfully established with and without MCS, reflecting the most important hemodynamic features of a Fontan circulation; however, chronic animal models were not reported.
Collapse
Affiliation(s)
- Marcus Granegger
- Pediatric Cardiovascular Surgery, Pediatric Heart Center, Department of Surgery, University Children’s Hospital Zurich, Zurich, Switzerland
- Children’s Research Center, University Children’s Hospital Zurich, Zurich, Switzerland
| | - Anna Valencia
- Pediatric Cardiovascular Surgery, Pediatric Heart Center, Department of Surgery, University Children’s Hospital Zurich, Zurich, Switzerland
- Children’s Research Center, University Children’s Hospital Zurich, Zurich, Switzerland
| | - Daniel Quandt
- Children’s Research Center, University Children’s Hospital Zurich, Zurich, Switzerland
- Pediatric Cardiology, Pediatric Heart Center, Department of Surgery, University Children’s Hospital Zurich, Zurich, Switzerland
| | - Hitendu Dave
- Pediatric Cardiovascular Surgery, Pediatric Heart Center, Department of Surgery, University Children’s Hospital Zurich, Zurich, Switzerland
- Children’s Research Center, University Children’s Hospital Zurich, Zurich, Switzerland
| | - Oliver Kretschmar
- Children’s Research Center, University Children’s Hospital Zurich, Zurich, Switzerland
- Pediatric Cardiology, Pediatric Heart Center, Department of Surgery, University Children’s Hospital Zurich, Zurich, Switzerland
| | - Michael Hübler
- Pediatric Cardiovascular Surgery, Pediatric Heart Center, Department of Surgery, University Children’s Hospital Zurich, Zurich, Switzerland
- Children’s Research Center, University Children’s Hospital Zurich, Zurich, Switzerland
| | - Martin Schweiger
- Pediatric Cardiovascular Surgery, Pediatric Heart Center, Department of Surgery, University Children’s Hospital Zurich, Zurich, Switzerland
- Children’s Research Center, University Children’s Hospital Zurich, Zurich, Switzerland
| |
Collapse
|
12
|
AvalonElite Double Lumen Cannula for Total Cavopulmonary Assist in Failing Fontan Sheep Model with Valved Extracardiac Conduit. ASAIO J 2018; 65:361-366. [PMID: 29746313 DOI: 10.1097/mat.0000000000000817] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
The AvalonElite double lumen cannula (DLC) provides total cavopulmonary assist (CPA) in failing Fontan sheep, but recirculation limits reliability. To improve CPA performance, a two-valve extracardiac conduit (ECC) was used to bracket infusion blood toward pulmonary artery (PA). A total cavopulmonary connection with failing Fontan circulation adult sheep model was created with valved ECC (n = 6). The valved ECC was connected to superior/inferior venae cavae (SVC/IVC) and right PA. The AvalonElite DLC was inserted from right jugular vein with infusion opening between the ECC valves. The DLC drainage lumen withdrew blood from SVC/IVC, and the infusion lumen returned blood to ECC. A failing Fontan sheep model with valved ECC was successfully created. Central venous pressure increased from 9 ± 1 to 17 ± 1 mm Hg, systolic arterial pressure decreased from 103 ± 9 to 51 ± 13 mm Hg, and cardiac output decreased from 3.6 ± 0.3 to 1.4 ± 0.2 L/min. Serum lactate significantly increased, indicating poor tissue perfusion. At 4 L/min pumping flow, the AvalonElite DLC returned hemodynamics/lactate to baseline levels throughout 6 hour CPA. Necropsy revealed intact/well-functioning ECC valves and well-positioned DLC with no visible thrombosis. The AvalonElite DLC provides reliable CPA performance in failing Fontan sheep with valved ECC.
Collapse
|
13
|
A Numerical Simulation Comparing a Cavopulmonary Assist Device and VA ECMO for Failing Fontan Support. ASAIO J 2017; 63:604-612. [PMID: 28319522 DOI: 10.1097/mat.0000000000000560] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
A cavopulmonary assist device (CPAD) has been developed for failing Fontan support. This CPAD pumps blood from superior/inferior vena cavae (SVC/IVC) to pulmonary artery. In this study, we compared failing Fontan support with CPAD versus veno-arterial extracorporeal membrane oxygenation (VA ECMO) in silico. A numerical lumped-parameter circulatory system model was used to simulate Fontan circulation. Failing Fontan was simulated by increased pulmonary resistance. Central venous pressure (CVP), mean pulmonary arterial pressure (mPAP), left atrial pressure (LAP), and univentricular outflow (CO) were simulated and compared with published clinical data. The CPAD and VA ECMO were simulated using 1-5 L/min pump flows. In agreement with published clinical data, the simulated failing Fontan condition had increased CVP (19 mmHg) and mPAP (18 mmHg) with decreased LAP (7 mmHg) and cardiac output (3 L/min) compared with functional Fontan condition. The CPAD achieved total Fontan assistance with pump flows higher than original CO. Veno-arterial extracorporeal membrane oxygenation provided partial Fontan assistance with low pump flows. Blood went through pulmonary circulation with CPAD whereas VA ECMO bypassed pulmonary circulation and diminished univentricular blood flow (0.8 L/min). This in silico study demonstrated that CPAD preserved heart/lung function whereas VA ECMO had very low univentricular flow, potentially leading to thrombosis or univentricular atrophy.
Collapse
|
14
|
Abstract
This article is a review of the literature published during the 12 months of 2016 that are of interest to the congenital cardiac anesthesiologist. Five themes are addressed for 2016, and 53 peer-reviewed articles are discussed.
Collapse
Affiliation(s)
- Richard J. Ing
- Children’s Hospital Colorado, Anschutz Medical Campus, Aurora, CO, USA
- University of Colorado School of Medicine, Aurora, CO, USA
| | - Mark Twite
- Children’s Hospital Colorado, Anschutz Medical Campus, Aurora, CO, USA
- University of Colorado School of Medicine, Aurora, CO, USA
| |
Collapse
|
15
|
Chopski SG, Moskowitz WB, Stevens RM, Throckmorton AL. Mechanical Circulatory Support Devices for Pediatric Patients With Congenital Heart Disease. Artif Organs 2016; 41:E1-E14. [DOI: 10.1111/aor.12760] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2015] [Revised: 03/21/2016] [Accepted: 03/22/2016] [Indexed: 01/03/2023]
Affiliation(s)
- Steven G. Chopski
- BioCirc Research Laboratory, School of Biomedical Engineering, Science and Health Systems; Drexel University; Philadelphia PA
| | - William B. Moskowitz
- Division of Pediatric Cardiology, Children's Hospital of Richmond and School of Medicine; Virginia Commonwealth University; Richmond VA
| | - Randy M. Stevens
- St. Christopher's Hospital for Children, Tenet Healthcare Corporation; Philadelphia PA USA
| | - Amy L. Throckmorton
- BioCirc Research Laboratory, School of Biomedical Engineering, Science and Health Systems; Drexel University; Philadelphia PA
| |
Collapse
|
16
|
Chopski SG, Fox CS, McKenna KL, Riddle ML, Kafagy DH, Stevens RM, Throckmorton AL. Physics-driven impeller designs for a novel intravascular blood pump for patients with congenital heart disease. Med Eng Phys 2016; 38:622-632. [DOI: 10.1016/j.medengphy.2016.03.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Revised: 02/25/2016] [Accepted: 03/28/2016] [Indexed: 01/30/2023]
|
17
|
Di Molfetta A, Ferrari G, Filippelli S, Fresiello L, Iacobelli R, Gagliardi MG, Amodeo A. Use of Ventricular Assist Device in Univentricular Physiology: The Role of Lumped Parameter Models. Artif Organs 2015; 40:444-53. [PMID: 26494529 DOI: 10.1111/aor.12583] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Failing single-ventricle (SV) patients might benefit from ventricular assist devices (VADs) as a bridge to heart transplantation. Considering the complex physiopathology of SV patients and the lack of established experience, the aim of this work was to realize and test a lumped parameter model of the cardiovascular system, able to simulate SV hemodynamics and VAD implantation effects. Data of 30 SV patients (10 Norwood, 10 Glenn, and 10 Fontan) were retrospectively collected and used to simulate patients' baseline. Then, the effects of VAD implantation were simulated. Additionally, both the effects of ventricular assistance and cavopulmonary assistance were simulated in different pathologic conditions on Fontan patients, including systolic dysfunction, diastolic dysfunction, and pulmonary vascular resistance increment. The model can reproduce patients' baseline well. Simulation results suggest that the implantation of VAD: (i) increases the cardiac output (CO) in all the three palliation conditions (Norwood 77.2%, Glenn 38.6%, and Fontan 17.2%); (ii) decreases the SV external work (SVEW) (Norwood 55%, Glenn 35.6%, and Fontan 41%); (iii) increases the mean pulmonary arterial pressure (Pap) (Norwood 39.7%, Glenn 12.1%, and Fontan 3%). In Fontan circulation, with systolic dysfunction, the left VAD (LVAD) increases CO (35%), while the right VAD (RVAD) determines a decrement of inferior vena cava pressure (Pvci) (39%) with 34% increment of CO. With diastolic dysfunction, the LVAD increases CO (42%) and the RVAD decreases the Pvci. With pulmonary vascular resistance increment, the RVAD allows the highest CO (50%) increment with the highest decrement of Pvci (53%). The single ventricular external work (SVEW) increases (decreases) increasing the VAD speed in cavopulmonary (ventricular) assistance. Numeric models could be helpful in this challenging and innovative field to support patients and VAD selection to optimize the clinical outcome and personalize the therapy.
Collapse
Affiliation(s)
- Arianna Di Molfetta
- Department of Pediatric Cardiology and Cardiac Surgery, Pediatric Hospital Bambino Gesù, Rome, Italy
| | | | - Sergio Filippelli
- Department of Pediatric Cardiology and Cardiac Surgery, Pediatric Hospital Bambino Gesù, Rome, Italy
| | - Libera Fresiello
- Section of Rome, CNR, Institute of Clinical Physiology, Rome, Italy
| | - Roberta Iacobelli
- Department of Pediatric Cardiology and Cardiac Surgery, Pediatric Hospital Bambino Gesù, Rome, Italy
| | - Maria G Gagliardi
- Department of Pediatric Cardiology and Cardiac Surgery, Pediatric Hospital Bambino Gesù, Rome, Italy
| | - Antonio Amodeo
- Department of Pediatric Cardiology and Cardiac Surgery, Pediatric Hospital Bambino Gesù, Rome, Italy
| |
Collapse
|
18
|
Chopski SG, Fox CS, Riddle ML, McKenna KL, Patel JP, Rozolis JT, Throckmorton AL. Pressure-Flow Experimental Performance of New Intravascular Blood Pump Designs for Fontan Patients. Artif Organs 2015; 40:233-42. [DOI: 10.1111/aor.12549] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Steven G. Chopski
- BioCirc Research Laboratory; School of Biomedical Engineering, Science, and Health Systems; Drexel University; Philadelphia PA USA
| | - Carson S. Fox
- BioCirc Research Laboratory; School of Biomedical Engineering, Science, and Health Systems; Drexel University; Philadelphia PA USA
| | - Michelle L. Riddle
- BioCirc Research Laboratory; School of Biomedical Engineering, Science, and Health Systems; Drexel University; Philadelphia PA USA
| | - Kelli L. McKenna
- BioCirc Research Laboratory; School of Biomedical Engineering, Science, and Health Systems; Drexel University; Philadelphia PA USA
| | - Jay P. Patel
- BioCirc Research Laboratory; School of Biomedical Engineering, Science, and Health Systems; Drexel University; Philadelphia PA USA
| | - John T. Rozolis
- BioCirc Research Laboratory; School of Biomedical Engineering, Science, and Health Systems; Drexel University; Philadelphia PA USA
| | - Amy L. Throckmorton
- BioCirc Research Laboratory; School of Biomedical Engineering, Science, and Health Systems; Drexel University; Philadelphia PA USA
| |
Collapse
|
19
|
|