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Singh M, Roubertie F, Ozturk C, Borchiellini P, Rames A, Bonnemain J, Gollob SD, Wang SX, Naulin J, El Hamrani D, Dugot-Senant N, Gosselin I, Grenet C, L'Heureux N, Roche ET, Kawecki F. Hemodynamic evaluation of biomaterial-based surgery for Tetralogy of Fallot using a biorobotic heart, in silico, and ovine models. Sci Transl Med 2024; 16:eadk2936. [PMID: 38985852 DOI: 10.1126/scitranslmed.adk2936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 03/12/2024] [Accepted: 06/20/2024] [Indexed: 07/12/2024]
Abstract
Tetralogy of Fallot is a congenital heart disease affecting newborns and involves stenosis of the right ventricular outflow tract (RVOT). Surgical correction often widens the RVOT with a transannular enlargement patch, but this causes issues including pulmonary valve insufficiency and progressive right ventricle failure. A monocusp valve can prevent pulmonary regurgitation; however, valve failure resulting from factors including leaflet design, morphology, and immune response can occur, ultimately resulting in pulmonary insufficiency. A multimodal platform to quantitatively evaluate the effect of shape, size, and material on clinical outcomes could optimize monocusp design. This study introduces a benchtop soft biorobotic heart model, a computational fluid model of the RVOT, and a monocusp valve made from an entirely biological cell-assembled extracellular matrix (CAM) to tackle the multifaceted issue of monocusp failure. The hydrodynamic and mechanical performance of RVOT repair strategies was assessed in biorobotic and computational platforms. The monocusp valve design was validated in vivo in ovine models through echocardiography, cardiac magnetic resonance, and catheterization. These models supported assessment of surgical feasibility, handling, suturability, and hemodynamic and mechanical monocusp capabilities. The CAM-based monocusp offered a competent pulmonary valve with regurgitation of 4.6 ± 0.9% and a transvalvular pressure gradient of 4.3 ± 1.4 millimeters of mercury after 7 days of implantation in sheep. The biorobotic heart model, in silico analysis, and in vivo RVOT modeling allowed iteration in monocusp design not now feasible in a clinical environment and will support future surgical testing of biomaterials for complex congenital heart malformations.
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Affiliation(s)
- Manisha Singh
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA 02142, USA
| | - François Roubertie
- IHU Liryc, Electrophysiology and Heart Modeling Institute, F-33604 Pessac, France
- Congenital Heart Diseases Department, CHU de Bordeaux, F-33604 Pessac, France
| | - Caglar Ozturk
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA 02142, USA
| | - Paul Borchiellini
- University of Bordeaux, INSERM, BioTis, U1026, F-33000 Bordeaux, France
| | - Adeline Rames
- University of Bordeaux, INSERM, BioTis, U1026, F-33000 Bordeaux, France
| | - Jean Bonnemain
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA 02142, USA
- Department of Adult Intensive Care Medicine, Lausanne University Hospital and University of Lausanne, CH-1011 Lausanne, Switzerland
| | - Samuel Dutra Gollob
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Sophie X Wang
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA 02142, USA
- Department of Surgery, Beth Israel Deaconess Medical Center, Boston, MA 02215, USA
| | - Jérôme Naulin
- IHU Liryc, Electrophysiology and Heart Modeling Institute, F-33604 Pessac, France
| | - Dounia El Hamrani
- IHU Liryc, Electrophysiology and Heart Modeling Institute, F-33604 Pessac, France
| | - Nathalie Dugot-Senant
- Plateforme d'histopathologie, TBMcore INSERM US005-CNRS 3427, F-33000 Bordeaux, France
| | - Isalyne Gosselin
- Plateforme d'histopathologie, TBMcore INSERM US005-CNRS 3427, F-33000 Bordeaux, France
| | - Célia Grenet
- University of Bordeaux, INSERM, BioTis, U1026, F-33000 Bordeaux, France
| | - Nicolas L'Heureux
- University of Bordeaux, INSERM, BioTis, U1026, F-33000 Bordeaux, France
| | - Ellen T Roche
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA 02142, USA
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Fabien Kawecki
- University of Bordeaux, INSERM, BioTis, U1026, F-33000 Bordeaux, France
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Bhende VV, Sharma TS, Krishnakumar M, Ramaswamy AS, Bilgi K, Pathan SR. Beyond Synthetics: Promising Outcomes With the Invengenx® Bovine Pericardial Patch for Ventricular Septal Defect Repair in a Young Pediatric Population. Cureus 2024; 16:e55530. [PMID: 38444930 PMCID: PMC10913133 DOI: 10.7759/cureus.55530] [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] [Accepted: 02/29/2024] [Indexed: 03/07/2024] Open
Abstract
Ventricular septal defects (VSDs) are a prevalent congenital heart anomaly demanding safe and lasting interventions. This paper explores the application of Invengenx® bovine pericardial patch (Tisgenx, Irvine, California), a promising biomaterial, in VSD repair. We present two case studies: a seven-month-old infant and a three-year-old child undergoing VSD closure using autologous and bovine pericardial patches, respectively. Both patients tolerated the procedures well, experiencing no intra-operative complications and demonstrating excellent postoperative recovery. Echocardiography postoperatively showed no complications and improved clinical outcomes. Notably, the pericardial patches exhibited excellent integration and suture retention, highlighting their durability and compatibility with the growing heart. These cases establish the feasibility and effectiveness of the Invengenx® pericardial patch for VSD repair. The favorable outcomes in terms of safety and efficacy support the potential of this biomaterial as a valuable alternative in pediatric cardiac surgery, particularly for complex VSDs or patients with contraindications to synthetic patches. Further research is crucial to unlock the full potential of bovine pericardium as a durable and advantageous option for VSD repair in a broader range of pediatric patients.
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Affiliation(s)
- Vishal V Bhende
- Pediatric Cardiac Surgery, Bhanubhai and Madhuben Patel Cardiac Centre, Shree Krishna Hospital, Bhaikaka University, Karamsad, IND
| | - Tanishq S Sharma
- Pediatric Cardiac Surgery, Bhanubhai and Madhuben Patel Cardiac Centre, Shree Krishna Hospital, Bhaikaka University, Karamsad, IND
| | | | - Anikode S Ramaswamy
- Pathology, People's Education Society (PES) Institute of Medical Sciences and Research, Kuppam, IND
| | - Kanchan Bilgi
- Neuroanesthesiology, People Tree Hospitals, Bengaluru, IND
| | - Sohilkhan R Pathan
- Clinical Research Services (CRS), Bhanubhai and Madhuben Patel Cardiac Centre, Shree Krishna Hospital, Bhaikaka University, Karamsad, IND
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Arruda MB, Aguiar LD, Marques SRDB, Cavalcanti LRP, Sá MPBO. Oral Use of Phenytoin to Reduce Calcification in Bovine Pericardium and Porcine Aortic Leaflets Implants in Rats. Braz J Cardiovasc Surg 2021; 36:295-300. [PMID: 34387971 PMCID: PMC8357389 DOI: 10.21470/1678-9741-2020-0252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Introduction: This study aims to test the effect of phenytoin as an inhibitor of the process of dystrophic calcification in bovine pericardium and porcine leaflets implanted in the subcutaneous tissue of rats. Methods: Isolated segments of biomaterials were implanted subcutaneously in young rats. The study groups received 500 mg phenytoin per kilogram of diet per day. After 90 days, samples were collected and quantitative calcification assessment by optical microscopy, radiological studies with mammography, and atomic emission spectrometry were performed. Results: Inflammatory reaction was a frequent finding in all groups when analyzed by optical microscopy. The calcium level assessed by atomic absorption spectrophotometry was significantly lower in the study groups using phenytoin compared to the control groups (control bovine pericardium group X=0.254±0.280 µg/mg; study bovine pericardium group X=0.063±0.025 µg/mg; control porcine aortic leaflets group X=0.640±0.226 µg/mg; study porcine aortic leaflets group X=0.056±0.021 µg/mg; P<0.05). Radiologic studies revealed a statistically significant difference between the groups treated with and without phenytoin (not only regarding the bovine pericardium but also the porcine leaflets). Conclusion: The results obtained suggest that phenytoin reduces the calcification process of bovine pericardium segments and porcine aortic leaflets in subdermal implants in rats; also, the incidence of calcification in bovine pericardium grafts was similar to that of porcine aortic leaflets.
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Affiliation(s)
- Mauro Barbosa Arruda
- Division of Cardiovascular Surgery, Pronto-Socorro Cardiológico de Pernambuco (PROCAPE), Recife, Pernambuco, Brazil.,Division of Cardiovascular Surgery, University of Pernambuco (UPE), Recife, Pernambuco, Brazil.,Department of Surgery, Universidade Federal de Pernambuco (UFPE), Recife, Pernambuco, Brazil
| | - Lamartine Daniel Aguiar
- Department of Surgery, Universidade Federal de Pernambuco (UFPE), Recife, Pernambuco, Brazil
| | | | - Luiz Rafael Pereira Cavalcanti
- Division of Cardiovascular Surgery, Pronto-Socorro Cardiológico de Pernambuco (PROCAPE), Recife, Pernambuco, Brazil.,Division of Cardiovascular Surgery, University of Pernambuco (UPE), Recife, Pernambuco, Brazil
| | - Michel Pompeu B O Sá
- Division of Cardiovascular Surgery, Pronto-Socorro Cardiológico de Pernambuco (PROCAPE), Recife, Pernambuco, Brazil.,Division of Cardiovascular Surgery, University of Pernambuco (UPE), Recife, Pernambuco, Brazil.,Nucleus of Postgraduate and Research in Health Sciences, Faculdade de Ciências Médicas, Instituto de Ciências Biológicas, University of Pernambuco (UPE), Recife, Pernambuco, Brazil
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4
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Jussli-Melchers J, Scheewe J, Hansen JH, Grothusen C, Steer J, Voges I, Logoteta J, Dütschke P, Kramer HH, Attmann T. Right ventricular outflow tract reconstruction with the Labcor® stentless valved pulmonary conduit. Eur J Cardiothorac Surg 2020; 57:380-387. [PMID: 31302680 DOI: 10.1093/ejcts/ezz200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Revised: 05/27/2019] [Accepted: 06/09/2019] [Indexed: 11/12/2022] Open
Abstract
OBJECTIVES The right ventricular outflow tract reconstruction is a common necessity in congenital cardiac surgery. As homograft availability is limited, alternatives need to be evaluated. The Labcor® conduit consists of a porcine tricomposite valve assembled inside a bovine pericardium tube. This study presents intermediate-term results for its utilization for right ventricular outflow tract reconstruction. METHODS Labcor conduits were implanted in 53 patients (February 2009-July 2016). We analysed perioperative data, freedom from conduit failure and risk factors for conduit dysfunction. RESULTS The most common diagnosis was Tetralogy of Fallot (n = 20, 37.7%). The median age at surgery was 10.0 [interquartile range (IQR) 4.9-14.3] years. Pulmonary artery plasty (n = 37, 69.8%) and augmentation of the right ventricular outflow tract (n = 16, 30.2%) were often part of the procedure. The median conduit size was 21 (range 11-25) mm. There was no in-hospital death. The median follow-up after surgery was 4.6 (IQR 3.4-5.6) years. Fourteen patients (27.5%) developed conduit failure with stenosis being the main cause. Freedom from conduit failure was 98.0% at 2 and 80.5% at 5 years. The median longevity of the conduit was 7.4 years (95% confidence interval 5.1-9.8 years). Younger age and smaller conduit size were related to conduit failure. CONCLUSIONS Utilization of the Labcor conduit revealed acceptable intermediate-term results. The conduit appeared to be functioning sufficiently well within the first 5 years in the majority of patients. The higher rate of failure concerning smaller conduits might be associated with somatic outgrowth; however, conduit degeneration as common and long-term outcome still needs to be evaluated.
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Affiliation(s)
- Jill Jussli-Melchers
- Department of Cardiovascular Surgery, University Hospital Schleswig-Holstein, Kiel, Germany
| | - Jens Scheewe
- Department of Cardiovascular Surgery, University Hospital Schleswig-Holstein, Kiel, Germany
| | - Jan Hinnerk Hansen
- Department of Congenital Heart Disease and Pediatric Cardiology, University Hospital Schleswig-Holstein, Kiel, Germany.,DZHK (German Center for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, Germany
| | - Christina Grothusen
- Department of Cardiovascular Surgery, University Hospital Schleswig-Holstein, Kiel, Germany
| | - Julia Steer
- Department of Cardiovascular Surgery, University Hospital Schleswig-Holstein, Kiel, Germany
| | - Inga Voges
- Department of Congenital Heart Disease and Pediatric Cardiology, University Hospital Schleswig-Holstein, Kiel, Germany
| | - Jana Logoteta
- Department of Congenital Heart Disease and Pediatric Cardiology, University Hospital Schleswig-Holstein, Kiel, Germany
| | - Peter Dütschke
- Department of Anesthesiology and Intensive Care Medicine, University Hospital Schleswig-Holstein, Kiel, Germany
| | - Hans-Heiner Kramer
- Department of Congenital Heart Disease and Pediatric Cardiology, University Hospital Schleswig-Holstein, Kiel, Germany.,DZHK (German Center for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, Germany
| | - Tim Attmann
- Department of Cardiovascular Surgery, University Hospital Schleswig-Holstein, Kiel, Germany
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5
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François K, De Groote K, Vandekerckhove K, De Wilde H, De Wolf D, Bové T. Small-sized conduits in the right ventricular outflow tract in young children: bicuspidalized homografts are a good alternative to standard conduits. Eur J Cardiothorac Surg 2019; 53:409-415. [PMID: 29029050 DOI: 10.1093/ejcts/ezx354] [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: 06/06/2017] [Revised: 08/20/2017] [Accepted: 08/23/2017] [Indexed: 11/12/2022] Open
Abstract
OBJECTIVES Downsizing a homograft (HG) through bicuspidalization has been used for more than 2 decades to overcome the shortage of small-sized conduits for reconstruction of the right ventricular outflow tract (RVOT) in young children. Our goal was to investigate the durability of bicuspidalized HGs compared with other small HGs. METHODS A retrospective analysis of 93 conduits ≤20 mm, implanted over 23 years, was performed. The end-points were survival, structural valve degeneration and conduit replacement. The conduits comprised 40 pulmonary HGs, 12 aortic HGs, 17 bicuspidalized HGs and 24 xenografts. RESULTS The median age, mean conduit diameter and z-value at implantation were 1.4 (interquartile range 0.3-3) years, 16.5 ± 2.7 mm and 2.8 ± 1.3, respectively. Valve position was heterotopic in 59 patients and orthotopic in 34 patients. At a mean follow-up period of 7.6 ± 5.9 years, the hospital survival rate was 89%. Freedom from explant at 5 and 10 years was 83 ± 5% and 52 ± 6%, respectively. Freedom from structural valve degeneration was 79 ± 5% at 5 years and 47 ± 6% at 10 years [68 ± 8% for pulmonary HG, 42 ± 16% for bicuspidalized HG, 31 ± 15% for aortic HG and 20 ± 9% for xenografts (log rank P < 0.001)]. Multivariable analysis indicated an increased risk for structural valve degeneration with smaller conduit size (hazard ratio 0.79, 95% confidence interval 0.67-0.94; P < 0.008), extra-anatomic position (hazard ratio 2.71, 95% confidence interval 1.33-5.50; P = 0.006) and the use of xenografts compared with non-downsized pulmonary HGs (hazard ratio 4.90, 95% confidence interval 2.23-10.76; P < 0.001). CONCLUSIONS Appropriately sized pulmonary HGs remain the most durable option for a right ventricular outflow tract conduit in young children. However, when a small pulmonary HG is unavailable, bicuspidalization offers a valid alternative, preferable to xenograft conduits, at mid-term follow-up.
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Affiliation(s)
- Katrien François
- Department of Cardiac Surgery, University Hospital Ghent, Ghent, Belgium
| | - Katya De Groote
- Department of Pediatric Cardiology, University Hospital Ghent, Ghent, Belgium
| | | | - Hans De Wilde
- Department of Pediatric Cardiology, University Hospital Ghent, Ghent, Belgium
| | - Daniel De Wolf
- Department of Pediatric Cardiology, University Hospital Ghent, Ghent, Belgium
| | - Thierry Bové
- Department of Cardiac Surgery, University Hospital Ghent, Ghent, Belgium
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6
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Soynov IA, Zhuravleva IY, Kulyabin YY, Nichay NR, Afanasyev AV, Aleshkevich NP, Bogachev-Prokofiev AV, Karaskov AM. [Valved conduits in pediatric cardiac surgery]. Khirurgiia (Mosk) 2018:75-81. [PMID: 29376963 DOI: 10.17116/hirurgia2018175-81] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- I A Soynov
- Meshalkin Siberian Federal Biomedical Research Center of Healthcare Ministry of the Russian Federation, Novosibirsk, Russia
| | - I Yu Zhuravleva
- Meshalkin Siberian Federal Biomedical Research Center of Healthcare Ministry of the Russian Federation, Novosibirsk, Russia
| | - Yu Yu Kulyabin
- Meshalkin Siberian Federal Biomedical Research Center of Healthcare Ministry of the Russian Federation, Novosibirsk, Russia
| | - N R Nichay
- Meshalkin Siberian Federal Biomedical Research Center of Healthcare Ministry of the Russian Federation, Novosibirsk, Russia
| | - A V Afanasyev
- Meshalkin Siberian Federal Biomedical Research Center of Healthcare Ministry of the Russian Federation, Novosibirsk, Russia
| | - N P Aleshkevich
- Meshalkin Siberian Federal Biomedical Research Center of Healthcare Ministry of the Russian Federation, Novosibirsk, Russia
| | - A V Bogachev-Prokofiev
- Meshalkin Siberian Federal Biomedical Research Center of Healthcare Ministry of the Russian Federation, Novosibirsk, Russia
| | - A M Karaskov
- Meshalkin Siberian Federal Biomedical Research Center of Healthcare Ministry of the Russian Federation, Novosibirsk, Russia
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Patra C, Boccaccini A, Engel F. Vascularisation for cardiac tissue engineering: the extracellular matrix. Thromb Haemost 2017; 113:532-47. [DOI: 10.1160/th14-05-0480] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2014] [Accepted: 09/03/2014] [Indexed: 02/07/2023]
Abstract
SummaryCardiovascular diseases present a major socio-economic burden. One major problem underlying most cardiovascular and congenital heart diseases is the irreversible loss of contractile heart muscle cells, the cardiomyocytes. To reverse damage incurred by myocardial infarction or by surgical correction of cardiac malformations, the loss of cardiac tissue with a thickness of a few millimetres needs to be compensated. A promising approach to this issue is cardiac tissue engineering. In this review we focus on the problem of in vitro vascularisation as implantation of cardiac patches consisting of more than three layers of cardiomyocytes (> 100 μm thick) already results in necrosis. We explain the need for vascularisation and elaborate on the importance to include non-myocytes in order to generate functional vascularised cardiac tissue. We discuss the potential of extracellular matrix molecules in promoting vascularisation and introduce nephronectin as an example of a new promising candidate. Finally, we discuss current biomaterial- based approaches including micropatterning, electrospinning, 3D micro-manufacturing technology and porogens. Collectively, the current literature supports the notion that cardiac tissue engineering is a realistic option for future treatment of paediatric and adult patients with cardiac disease.
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8
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Prótesis pulmonar porcina versus yugular bovina para reparar el tracto de salida del ventrículo derecho en menores con cardiopatía congénita. CIRUGIA CARDIOVASCULAR 2017. [DOI: 10.1016/j.circv.2016.10.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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9
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Salem AM. Right ventricle to pulmonary artery connection: Evolution and current alternatives. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.jescts.2016.04.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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Solomon NAG, Pranav SK, Jain KA, Kumar M, Kulkarni CB, Akbari J. In search of a pediatric cardiac surgeon’s ‘Holy Grail’: the ideal pulmonary conduit. Expert Rev Cardiovasc Ther 2014; 4:861-70. [PMID: 17173502 DOI: 10.1586/14779072.4.6.861] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The limited lifespan of all currently available conduits leads to repeat operations and interventional procedures in many children. Each reoperation entails considerable risk to life, expenditure and compromised quality of life as the conduit degenerates. The ideal conduit should be available freely, inexpensive, require no anticoagulation, be resistant to infection, free from thromboembolism, have no gradients or regurgitation and have unlimited durability. This review explores various options as surgeons and researchers endeavor to develop the ideal conduit--which will fulfill all of the above-mentioned criteria. Various currently available conduits are analyzed. Special emphasis is given to tissue-engineered valves and percutaneous valve implantations.
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Affiliation(s)
- Neville A G Solomon
- Apollo Hospital, Department of Cardiothoracic Surgery, 21 Greams Lane, Off Greams Road, Chennai-600006, India.
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11
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Carrel T. Bovine valved jugular vein (Contegra™) to reconstruct the right ventricular outflow tract. Expert Rev Med Devices 2014; 1:11-9. [PMID: 16293006 DOI: 10.1586/17434440.1.1.11] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The right ventricular outflow tract (RVOT) is the part of the circulation located between the right ventricle and the bifurcation of the pulmonary artery. The most cranial part of the right ventriculum infundibulum, the pulmonary anulus, the valve and finally the main trunk of the pulmonary artery are the most important structures. The RVOT is frequently affected in congenital heart diseases, either isolated, or in combination with other cardiac malformations. Current techniques for surgical correction of anomalies of the RVOT include repair and/or replacement of the pulmonary valve often combined with sub- or supravalvular reconstruction. The use of extracardiac conduits (homografts, stented or stentless xenografts) to re-establish continuity between the pulmonary ventricle and pulmonary artery has been an important advance in repair of complex congenital malformations. The Contegra (Medtronic) conduit was introduced as a xenograft tissue for RVOT reconstruction. This conduit has some advantages over homografts including availability for pediatric and adult patient sizes and proximal and distal cuffs allowing for extended reconstruction. The principal late problem related to extracardiac conduit operations is the inevitable need for one or more conduit replacements due to patient somatic growth or progressive conduit degeneration and calcification leading to stenosis.
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Affiliation(s)
- Thierry Carrel
- Clinic for Cardiovascular Surgery, University Hospital, CH-3010 Bern, Switzerland.
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12
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Neethling WML, Strange G, Firth L, Smit FE. Evaluation of a tissue-engineered bovine pericardial patch in paediatric patients with congenital cardiac anomalies: initial experience with the ADAPT-treated CardioCel(R) patch. Interact Cardiovasc Thorac Surg 2013; 17:698-702. [PMID: 23832918 DOI: 10.1093/icvts/ivt268] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
OBJECTIVES This study evaluated the safety, efficacy and clinical performance of the tissue-engineered ADAPT® bovine pericardial patch (ABPP) in paediatric patients with a range of congenital cardiac anomalies. METHODS In this single-centre, prospective, non-randomized clinical study, paediatric patients underwent surgery for insertion of the ABPP. Primary efficacy measures included early (<30 day) morbidity; incidence of device-related complications; haemodynamic performance derived from echocardiography assessment at 6- and 12-month follow-up and magnetic resonance imaging findings in 10 randomly selected patients at 12 months. Secondary measures included device-handling characteristics; shape and sizing characteristics and perioperative implant complications. The Aristotle complexity scoring system was used to score the complexity level of all surgical procedures. Patients completing the 12-month study were eligible to enter a long-term evaluation study. RESULTS Between April 2008 and September 2009, the ABPP was used in 30 paediatric patients. In the 30-day postoperative period, no graft-related morbidity was observed. In total, there were 5 deaths (2 in the 30-day postoperative period and 3 within the first 6 postoperative months). All deaths were deemed due to comorbid non-graft-related events. Echocardiography assessment at 6 and 12 months revealed intact anatomical and haemodynamically stable repairs without any visible calcification of the patch. Magnetic resonance imaging assessment in 10 patients at 12 months revealed no signs of calcification. Fisher's exact test demonstrated that patients undergoing more complex, higher risk surgical repairs (Aristotle complexity score >8) were significantly more likely to die (P = 0.0055, 58% survival compared with 100% survival for less complex surgical repairs). In 19 patients, echocardiographic data were available at 18-36 months with no evidence of device calcification, infection, thromboembolic events or device failure. CONCLUSIONS This study demonstrates the safety and efficacy of this engineered bovine pericardial patch as a cardiovascular substitute for surgical repair of both simple and more complex congenital cardiac defects.
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Affiliation(s)
- William M L Neethling
- Fremantle Heart Institute, Fremantle Hospital, School of Surgery, University of Western Australia, Fremantle, Western Australia
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The Performance of Hancock Porcine-Valved Dacron Conduit for Right Ventricular Outflow Tract Reconstruction. Ann Thorac Surg 2010; 89:152-7; discussion 157-8. [DOI: 10.1016/j.athoracsur.2009.09.046] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2009] [Revised: 09/16/2009] [Accepted: 09/17/2009] [Indexed: 11/20/2022]
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14
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Yuan SM, Mishaly D, Shinfeld A, Raanani E. Right ventricular outflow tract reconstruction: valved conduit of choice and clinical outcomes. J Cardiovasc Med (Hagerstown) 2008; 9:327-37. [DOI: 10.2459/jcm.0b013e32821626ce] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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15
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Takeuchi K, Murakami A, Sekiguchi A, Hirata Y, Maeda K, Kitahori K, Doi Y, Takamoto SI. Fate of Equine Pericardial Roll Conduit for Rastelli Operation during Long-term Follow-up. CONGENIT HEART DIS 2007; 2:121-4. [DOI: 10.1111/j.1747-0803.2007.00084.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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16
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Chiappini B, Barrea C, Rubay J. Right Ventricular Outflow Tract Reconstruction With Contegra Monocuspid Transannular Patch in Tetralogy of Fallot. Ann Thorac Surg 2007; 83:185-7. [PMID: 17184657 DOI: 10.1016/j.athoracsur.2006.07.071] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/07/2006] [Revised: 07/28/2006] [Accepted: 07/31/2006] [Indexed: 11/16/2022]
Abstract
BACKGROUND Pediatric diminutive right ventricular outflow tract (RVOT) reconstruction with homografts or porcine xenografts remains challenging because of limited availability, early degeneration, tissue ingrowth, and child growth. The objective of this study was to assess whether Contegra valved bovine conduit, implanted as monocuspid transannular patch, might be an interesting alternative to overcome these problems. METHODS We reconstructed the RVOT of 12 patients with tetralogy of Fallot, by the use of a Contegra conduit, tailored as a monocuspid valved transannular patch. The patients were 4 females and 8 males, with a mean age of 12.8 +/- 15.1 months and a mean weight of 7.2 +/- 1.9 kg. The mean pulmonary artery annulus size was 8.2 +/- 1.6 mm. RESULTS The Contegra tissue was suitable for suturing and for reconstruction of even severely hypoplasic RVOT. We did not observe any sign of conduit or valve degeneration during the follow-up of 28.1 +/- 17.1 months. There were no early or late deaths, and no device-related adverse events. A peak transvalvular gradient of 36.5 +/- 4.7 mm Hg was measured by echocardiography in 4 patients postoperatively, and it decreased during the follow-up to 20 +/- 7.6 mm Hg. Pulmonary valve incompetence was grade 3 in 2 patients and grade 4 in 2 patients. CONCLUSIONS The Contegra monocuspid transannular patch is widely applicable to RVOT reconstruction with satisfactory midterm results, particularly in patients with small pulmonary annulus. Its main advantage is to reduce the potential risk of supravalvular stenosis due to the narrowing at the distal suture line, as demonstrated when used as conduits, especially in the smaller sizes.
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Affiliation(s)
- Bruno Chiappini
- Department of Thoracic and Cardiovascular Surgery, St. Luc Hospital, Université Catholique de Louvain, Brussels, Belgium.
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Liu XG, Wu KH, Li XF, Shi C, Wang ZY, Tang Z, Shi XQ, Liu YL. Simultaneous Enlargement of the Pulmonary Annulus and the Pulmonary Cusp with Autologous Pericardium in Right Ventricular Outflow Tract Reconstruction. J Surg Res 2006; 136:320-4. [PMID: 17059834 DOI: 10.1016/j.jss.2006.08.024] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2006] [Revised: 08/18/2006] [Accepted: 08/25/2006] [Indexed: 10/24/2022]
Abstract
BACKGROUND Surgical repair of obstructive lesions of the right ventricular outflow tract (RVOT) commonly creates pulmonary valve incompetence, which continues to stimulate research for the optimal materials and surgical techniques to reconstruct RVOT. In this study, we present the early results with simultaneous enlargement of the pulmonary annulus and the pulmonary cusp with a transannular patch of autologous pericardium in RVOT reconstruction. PATIENTS AND METHODS From January 2003 to December 2005, the surgical technique of simultaneous enlargement of the pulmonary annulus and the pulmonary cusp was used in 32 patients who had complex congenital heart anomalies with pulmonary artery hypoplasia. The functional status of the patients was followed up in the cardiologic clinic of our institute. The motion of the newly constructed valve and the degree of pulmonary insufficiency were evaluated by echocardiography before discharge and at 2-6 months, 12 months, and 36 months postoperatively. RESULTS Early death occurred in one patient (3.1%). Postoperative complications occurred in six patients but they recovered uneventfully. During the follow-up, 28 of 31 operative survivors were in New York Heart Association functional class I without medication and the other three were in class II. Seventeen patients had no or trivial pulmonary regurgitation; mild regurgitation was present in 12 patients, and moderate regurgitation was seen in 2 patients. None of these patients needed reoperation and echocardiography showed good motion of the reconstructed valve. CONCLUSIONS The surgical technique of simultaneous enlargement of the pulmonary annulus and the pulmonary cusp with a transannular patch of autologous pericardium is a safe, reliable, and effective way for RVOT reconstruction. Satisfactory early results have been achieved; however, long-term follow-up is necessary to determine the true value of this technique.
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Affiliation(s)
- Xue Gang Liu
- Department of Cardiothoracic Surgery, Affiliated Hospital of Bengbu Medical College, Bengbu, China
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McMullan DM, Oppido G, Alphonso N, Cochrane AD, d'Acoz YD, Brizard CP. Evaluation of downsized homograft conduits for right ventricle–to–pulmonary artery reconstruction. J Thorac Cardiovasc Surg 2006; 132:66-71. [PMID: 16798304 DOI: 10.1016/j.jtcvs.2006.02.041] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/02/2005] [Revised: 01/03/2006] [Accepted: 02/17/2006] [Indexed: 10/24/2022]
Abstract
OBJECTIVE Although homograft conduits are frequently used to establish right ventricle-to-pulmonary artery continuity, the limited availability of small-size homografts is a significant constraint in pediatric cardiac surgery. We compared the performance of standard homograft conduits with that of surgically reduced bicuspid homograft conduits in patients undergoing repair of truncus arteriosus. METHODS Forty infants undergoing complete repair of truncus arteriosus with either standard homografts (n = 26) or reduced-size bicuspid homografts (n = 14) were evaluated. RESULTS The median downsized conduit diameter (13 mm) was similar to the standard homograft diameter (12 mm, P = .52). There were 6 early deaths and 5 late deaths, representing an overall 30-day mortality of 15% and a 5-year mortality of 25%. No deaths were directly related to homograft dysfunction. Four (29%) downsized conduits and 8 (31%) standard conduits required replacement at a median interval of 18.5 months and 42.4 months, respectively. Catheter-based interventions were required in 5 (36%) patients in the downsized group and in 3 (12%) patients in the standard group. There was no difference in freedom from surgical or catheter-based reintervention between the 2 groups (P = .42). Freedom from conduit failure (severe conduit stenosis, moderate or greater regurgitation) was 55.9% and 17.2% at 3 years in the downsized and standard groups, respectively. CONCLUSION The surgically downsized homograft is an excellent option when an appropriate-sized homograft is not available and might prevent morbidity associated with the use of an oversized conduit.
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Göber V, Berdat P, Pavlovic M, Pfammatter JP, Carrel TP. Adverse Mid-Term Outcome Following RVOT Reconstruction Using the Contegra Valved Bovine Jugular Vein. Ann Thorac Surg 2005; 79:625-31. [PMID: 15680848 DOI: 10.1016/j.athoracsur.2004.07.085] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 07/29/2004] [Indexed: 11/29/2022]
Abstract
BACKGROUND Current techniques for repair of the right ventricular outflow tract (RVOT) may require interposition of a valved conduit between the right ventricle and the pulmonary artery bifurcation. Recently, the Contegra conduit (Medtronic, Inc.) was introduced as an alternative xenograft tissue for RVOT reconstruction. Promising early hemodynamic and clinical results have been reported so far, but still less is known about mid-term adverse outcome. METHODS A total of 38 Contegra valved conduits (12 to 22 mm) were implanted from October 1999 to June 2004, in 36 children less than 5 years old and in 2 patients 8 and 21 years old. Diagnosis included the following: tetralogy of Fallot (n = 21); pulmonary atresia (n = 4); double outlet right ventricle + pulmonary stenosis (n = 3); d-transposition of the great arteries, ventricular septal defect, and pulmonary stenosis (n = 3); truncus arteriosus (n = 3); and other complex malformations (n = 4). RESULTS There was no mortality following initial surgery and no valved-conduit-related early morbidity. Early postoperative echocardiographic assessment after 3 months demonstrated favorable hemodynamics in all patients. However, during further follow-up, 5 conduits had to be replaced because of severe stenosis at the level of the distal anastomosis (2 of them had moderate to severe dilatation of the conduit proximally to the valve). Excessive intimal peel formation and severe perigraft scarring reaction were observed in all cases. One child died before surgery. CONCLUSIONS The Contegra valved conduit is an interesting concept for reconstruction of the RVOT. However, because of unpredictable incidence of supravalvar stenosis during mid-term results, we cannot recommend routine use of this material.
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Dave HH, Kadner A, Berger F, Seifert B, Dodge-Khatami A, Béttex D, Prêtre R. Early Results of the Bovine Jugular Vein Graft Used for Reconstruction of the Right Ventricular Outflow Tract. Ann Thorac Surg 2005; 79:618-24. [PMID: 15680847 DOI: 10.1016/j.athoracsur.2004.07.081] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 07/29/2004] [Indexed: 11/15/2022]
Abstract
BACKGROUND This study is an assessment of early results of bovine jugular vein grafts (BJV) used to reconstruct the right ventricular outflow tract. METHODS Ninety-three consecutive BJV implantations performed between May 2001 and August 2003 were included in this study. The median age was 7.2 years. Indications included various forms of tetralogy of Fallot and pulmonary atresia (56 patients), aortic valve disease requiring a Ross procedure (21 patients), truncus arteriosus (8 patients), d-transposition of the great arteries with ventricular septal defect and pulmonary stenosis (5 patients) and miscellaneous (3 patients). Additional plasty of the intrapericardial pulmonary arteries was performed in 41 patients. Follow-up was complete with a mean duration of 20.3 +/- 5.8 months. RESULTS There were 3 patients (3.2%) with early deaths and 2(2.2%) with late deaths, but none were related to the bovine jugular vein grafts. Twelve bovine jugular vein grafts needed reintervention; 11 were due to development of a stenotic membrane at the anastomosis site and one was due to somatic outgrowth of the child (10 conduit replacements and two balloon dilatations). Overall freedom from reintervention was 91.6% and 83.5% at 12 and 24 months, respectively. Small size (< or = 14 mm) conduits show respective rates of 80.7% and 63.6%, whereas larger sizes were 98% and 96%, free from reintervention at 12 and 24 months. CONCLUSIONS Bovine jugular vein grafts, when used for reconstruction of the right ventricular outflow tract, showed good early-term results. Attrition of small size bovine jugular vein grafts, due to development of a stenotic process at the anastomotic site needs to be closely observed. Longer follow-up is needed to allow a more definitive comparison with other established options.
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Affiliation(s)
- Hitendu H Dave
- Clinic for Cardiovascular Surgery, University Hospital Zurich,Zurich, Switzerland.
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Vricella LA, Kanani M, Cook AC, Cameron DE, Tsang VT. Problems with the right ventricular outflow tract: a review of morphologic features and current therapeutic options. Cardiol Young 2004; 14:533-49. [PMID: 15680076 DOI: 10.1017/s1047951104005116] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Repair of complex malformations that necessitate restoration of continuity between the right ventricle and the pulmonary arteries can now safely be performed with low morbidity and mortality. Major concerns still remain on the long-term outlook for these patients, and about the durability of the different prostheses used to restore that continuity, whether during initial correction or at the time of reintervention for failure of the conduit or pulmonary regurgitation. In this review, we discuss the salient morphologic features of the right ventricular outflow tract, and then focus on the indications for early and late intervention, current therapeutic options, and outcomes.
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Affiliation(s)
- Luca A Vricella
- Division of Cardiac Surgery, The Johns Hopkins Hospital, Baltimore, MD 21287-1824, USA. lvricella@jhmi@edu
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Forbess JM. Conduit selection for right ventricular outflow tract reconstruction: contemporary options and outcomes. Semin Thorac Cardiovasc Surg Pediatr Card Surg Annu 2004; 7:115-24. [PMID: 15283361 DOI: 10.1053/j.pcsu.2004.02.004] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Reconstruction of the right ventricular outflow tract, with the establishment of an unobstructed pathway between the right ventricle and the pulmonary arteries, is a task that the congenital heart surgeon frequently faces. In situations where this outflow tract is congenitally absent, or the pulmonary valve has been used to replace a dysfunctional left ventricular outflow tract, a conduit is usually required to establish pulmonary blood flow. Cryopreserved homografts are currently favored for this, though these nonviable valved allografts have certain limitations. The following review will further define the problem of right ventricular outflow tract reconstruction, with an emphasis on conduit selection and possible alternatives to conduit repair.
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Affiliation(s)
- Joseph M Forbess
- Division of Cardiothoracic Surgery, Emory University School of Medicine, Department of Cardiothoracic Surgery, Children's Healthcare of Atlanta, Atlanta, GA, USA
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Novick WM, Anic D, Lora Solf A, Arboleda Torres M, Niño De Guzmán León I, Reid RW, Di Sessa TG. Medtronic freestyle valve for right ventricular reconstruction in pediatric ross operations. Ann Thorac Surg 2004; 77:1711-6. [PMID: 15111172 DOI: 10.1016/j.athoracsur.2003.10.006] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 10/02/2003] [Indexed: 11/22/2022]
Abstract
BACKGROUND The use of homograft conduits to reconstruct right ventricle (RV) to pulmonary artery (PA) connections is an essential component of the Ross operation. Homograft availability and cost may be problematic when considering the Ross operation. We elected in January 1998 to utilize commercially available xenografts as an alternative to homografts for RV/PA reconstruction in the pediatric Ross operation. Our early results using the Medtronic Freestyle valve (Medtronic, Minneapolis, MN) for RV/PA reconstruction are presented. METHODS We reviewed our database for all Ross operations performed on children since January 1998. A total of 16 patients were identified. Eleven children received a Medtronic Freestyle valve, 2 children received a homograft, and 3 children received another type of xenograft. Echocardiographic evaluation of all children who received the Medtronic Freestyle valve was performed at hospital discharge and at two subsequent outpatient evaluations. RESULTS The median peak instantaneous pressure gradient across the xenograft was 16 +/- 9 mm Hg (immediately after surgery before hospital discharge); 22 +/- 20 mm Hg at 23 +/- 11 months (first postdischarge follow-up); and 27 +/- 20 mm Hg at 35 +/- 9 months (second postdischarge follow-up). Linear regression analysis revealed an increasing pressure gradient with time (R(2)-adjusted = 0.44, p < 0.0001). At the same three observation points, the xenograft annulus diameter decreased: 25 +/- 1.2 mm; 19 +/- 4.3 mm; and 20 +/- 1.8 mm. Linear regression analysis revealed a decreasing annulus diameter with time (R(2)-adjusted = 0.41, p < 0.0001). CONCLUSIONS The Medtronic Freestyle valve provides a possible alternative to homografts for the reconstruction of the RV/PA connection in the pediatric Ross operation. Long-term follow-up is necessary to evaluate this xenograft as an alternative to the homograft.
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Affiliation(s)
- William M Novick
- Department of Surgery and Pediatrics, University of Tennessee, Memphis, 38104, USA.
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Bermudez CA, Dearani JA, Puga FJ, Schaff HV, Warnes CA, O'Leary PW, Schleck CD, Danielson GK. Late results of the peel operation for replacement of failing extracardiac conduits. Ann Thorac Surg 2004; 77:881-7; discussion 888. [PMID: 14992892 DOI: 10.1016/j.athoracsur.2003.08.029] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND Pulmonary ventricle to pulmonary artery conduits have made repairing many complex congenital cardiac anomalies possible. Late patient outcome is adversely affected by the hemodynamic consequences of conduit failure and the need for reoperation for conduit replacement. METHODS We retrospectively reviewed 102 patients (65 males, 37 females) who underwent operation with autologous tissue reconstruction ("peel operation") between May 1983 and November 2001, in which a prosthetic roof was placed over the fibrous bed of the explanted conduit. Ages ranged from 5 to 58 years old (median age 19 years old). Explanted conduits were Hancock (n = 54), homograft (n = 21), Tascon (n = 11), and other (n = 16). The conduit roof was constructed with pericardium (n = 91) and other (n = 11). A prosthetic pulmonary valve was utilized in 68 patients: porcine in 65 patients and mechanical in 3 patients. A nonvalved reconstruction was performed in 34 patients. Concomitant cardiac procedures were performed in 66 patients. RESULTS Early mortality overall was 2% (n = 2) and was 0% for patients who underwent isolated conduit replacement (n = 36). Mean follow-up was 7.6 years (maximum, 19 years). Overall survival at 10 and 15 years was 91% (84.7, 97.2) and 76% (62.8, 91.7), respectively. Nine patients required reoperation related to the peel operation: regurgitation in nonvalved conduit (n = 7); moderate pulmonary bioprosthesis stenosis and regurgitation with atrial arrhythmia (n = 1); and pulmonary bioprosthesis endocarditis (n = 1). Overall survivorship free of reoperation for peel reconstruction failure at 10 and 15 years was 90.7% (82.6, 99.6) and 82% (69.4, 97.0), respectively. Survivorship free of reoperation for patients with a prosthetic valve was 93.7%, and for those with no prosthetic valve was 80.0% at 15 years (p = 0.57). At late follow-up, 89% of patients were in New York Heart Association functional class I or II. CONCLUSIONS The peel operation simplifies conduit replacement, can be performed with low risk, and provides a generous-sized flow pathway. In our experience late results demonstrate a lower freedom from reoperation than conventional prosthetic or homograft conduits.
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Affiliation(s)
- Christian A Bermudez
- Division of Cardiovascular Surgery, Mayo Clinic and Mayo Foundation, Rochester, MN, USA
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