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Notenboom ML, Schuermans A, Etnel JRG, Veen KM, van de Woestijne PC, Rega FR, Helbing WA, Bogers AJJC, Takkenberg JJM. Paediatric aortic valve replacement: a meta-analysis and microsimulation study. Eur Heart J 2023; 44:3231-3246. [PMID: 37366156 PMCID: PMC10482570 DOI: 10.1093/eurheartj/ehad370] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Revised: 04/21/2023] [Accepted: 05/24/2023] [Indexed: 06/28/2023] Open
Abstract
AIMS To support decision-making in children undergoing aortic valve replacement (AVR), by providing a comprehensive overview of published outcomes after paediatric AVR, and microsimulation-based age-specific estimates of outcome with different valve substitutes. METHODS AND RESULTS A systematic review of published literature reporting clinical outcome after paediatric AVR (mean age <18 years) published between 1/1/1990 and 11/08/2021 was conducted. Publications reporting outcome after paediatric Ross procedure, mechanical AVR (mAVR), homograft AVR (hAVR), and/or bioprosthetic AVR were considered for inclusion. Early risks (<30d), late event rates (>30d) and time-to-event data were pooled and entered into a microsimulation model. Sixty-eight studies, of which one prospective and 67 retrospective cohort studies, were included, encompassing a total of 5259 patients (37 435 patient-years; median follow-up: 5.9 years; range 1-21 years). Pooled mean age for the Ross procedure, mAVR, and hAVR was 9.2 ± 5.6, 13.0 ± 3.4, and 8.4 ± 5.4 years, respectively. Pooled early mortality for the Ross procedure, mAVR, and hAVR was 3.7% (95% CI, 3.0%-4.7%), 7.0% (5.1%-9.6%), and 10.6% (6.6%-17.0%), respectively, and late mortality rate was 0.5%/year (0.4%-0.7%/year), 1.0%/year (0.6%-1.5%/year), and 1.4%/year (0.8%-2.5%/year), respectively. Microsimulation-based mean life-expectancy in the first 20 years was 18.9 years (18.6-19.1 years) after Ross (relative life-expectancy: 94.8%) and 17.0 years (16.5-17.6 years) after mAVR (relative life-expectancy: 86.3%). Microsimulation-based 20-year risk of aortic valve reintervention was 42.0% (95% CI: 39.6%-44.6%) after Ross and 17.8% (95% CI: 17.0%-19.4%) after mAVR. CONCLUSION Results of paediatric AVR are currently suboptimal with substantial mortality especially in the very young with considerable reintervention hazards for all valve substitutes, but the Ross procedure provides a survival benefit over mAVR. Pros and cons of substitutes should be carefully weighed during paediatric valve selection.
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Affiliation(s)
- Maximiliaan L Notenboom
- Department of Cardiothoracic Surgery, Erasmus University Medical Centre, Erasmus MC, Doctor Molewaterplein 40, 3015 GD, Rotterdam, Zuid-Holland, The Netherlands
| | - Art Schuermans
- Department of Cardiac Surgery, University Hospitals Leuven, UZ Leuven Gasthuisberg, Herestraat 49, 3000, Leuven, Flanders, Belgium
- Cardiovascular Research Center, Massachusetts General Hospital, 149 13th Street, 4th floor, Boston, MA 02129, USA
- Program in Medical and Population Genetics and the Cardiovascular Disease Initiative, Broad Institute of Harvard and MIT, Merkin Building, 415 Main St., Cambridge, MA 02142, USA
| | - Jonathan R G Etnel
- Department of Cardiothoracic Surgery, Erasmus University Medical Centre, Erasmus MC, Doctor Molewaterplein 40, 3015 GD, Rotterdam, Zuid-Holland, The Netherlands
| | - Kevin M Veen
- Department of Cardiothoracic Surgery, Erasmus University Medical Centre, Erasmus MC, Doctor Molewaterplein 40, 3015 GD, Rotterdam, Zuid-Holland, The Netherlands
| | - Pieter C van de Woestijne
- Department of Cardiothoracic Surgery, Erasmus University Medical Centre, Erasmus MC, Doctor Molewaterplein 40, 3015 GD, Rotterdam, Zuid-Holland, The Netherlands
| | - Filip R Rega
- Department of Cardiac Surgery, University Hospitals Leuven, UZ Leuven Gasthuisberg, Herestraat 49, 3000, Leuven, Flanders, Belgium
| | - Willem A Helbing
- Department of Paediatrics, Division of Paediatric Cardiology, Erasmus MC-Sophia Children's Hospital, Wytemaweg 80, 3015 CN, Rotterdam, Zuid-Holland, The Netherlands
| | - Ad J J C Bogers
- Department of Cardiothoracic Surgery, Erasmus University Medical Centre, Erasmus MC, Doctor Molewaterplein 40, 3015 GD, Rotterdam, Zuid-Holland, The Netherlands
| | - Johanna J M Takkenberg
- Department of Cardiothoracic Surgery, Erasmus University Medical Centre, Erasmus MC, Doctor Molewaterplein 40, 3015 GD, Rotterdam, Zuid-Holland, The Netherlands
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Boucher AA, Heneghan JA, Jang S, Spillane KA, Abarbanell AM, Steiner ME, Meyer AD. A Narrative Review of Postoperative Anticoagulation Therapy for Congenital Cardiac Disease. Front Surg 2022; 9:907782. [PMID: 35774388 PMCID: PMC9237365 DOI: 10.3389/fsurg.2022.907782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Accepted: 05/26/2022] [Indexed: 11/18/2022] Open
Abstract
Congenital heart disease encompasses a range of cardiac birth defects. Some defects require early and complex surgical intervention and post-operative thromboprophylaxis primarily for valve, conduit, and shunt patency. Antiplatelet and anticoagulant management strategies vary considerably and may or may not align with recognized consensus practice guidelines. In addition, newer anticoagulant agents are being increasingly used in children, but these medications are not addressed in most consensus statements. This narrative review evaluated the literature from 2011 through 2021 on the topic of postoperative thromboprophylaxis after congenital heart disease operations. The search was focused on the descriptions and results of pediatric studies for replacement and/or repair of heart valves, shunts, conduits, and other congenital heart disease operations. Wide variability in practice exists and, as was true a decade ago, few randomized controlled trials have been conducted. Aspirin, warfarin, and perioperative heparin remain the most commonly used agents with varying dosing, duration, and monitoring strategies, making comparisons difficult. Only recently have data on direct oral anticoagulants been published in children, suggesting evolving paradigms of care. Our findings highlight the need for more research to strengthen the evidence for standardized thromboprophylaxis strategies.
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Affiliation(s)
- Alexander A. Boucher
- Division of Pediatric Hematology and Oncology, Department of Pediatrics, University of Minnesota Masonic Children’s Hospital, Minneapolis, MN, United States
- Correspondence: Alexander A. Boucher Julia A. Heneghan
| | - Julia A. Heneghan
- Division of Critical Care, Department of Pediatrics, University of Minnesota Masonic Children’s Hospital, Minneapolis, MN, United States
- Correspondence: Alexander A. Boucher Julia A. Heneghan
| | - Subin Jang
- Division of Pediatric Cardiac Surgery, Department of Surgery, University of Minnesota Masonic Children’s Hospital, Minneapolis, MN, United States
| | - Kaitlyn A. Spillane
- Division of Critical Care, Department of Pediatrics, Long School of Medicine, University of Texas Health Science Center, San Antonio, TX, United States
| | - Aaron M. Abarbanell
- Division of Congenital Cardiac Surgery, Department of Cardiothoracic Surgery, Long School of Medicine, University of Texas Health Science Center, San Antonio, TX, United States
| | - Marie E. Steiner
- Division of Pediatric Hematology and Oncology, Department of Pediatrics, University of Minnesota Masonic Children’s Hospital, Minneapolis, MN, United States
- Division of Critical Care, Department of Pediatrics, University of Minnesota Masonic Children’s Hospital, Minneapolis, MN, United States
| | - Andrew D. Meyer
- Division of Critical Care, Department of Pediatrics, Long School of Medicine, University of Texas Health Science Center, San Antonio, TX, United States
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Recellularization of a novel off-the-shelf valve following xenogenic implantation into the right ventricular outflow tract. PLoS One 2017; 12:e0181614. [PMID: 28763463 PMCID: PMC5538661 DOI: 10.1371/journal.pone.0181614] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Accepted: 07/05/2017] [Indexed: 12/20/2022] Open
Abstract
Current research on valvular heart repair has focused on tissue-engineered heart valves (TEHV) because of its potential to grow similarly to native heart valves. Decellularized xenografts are a promising solution; however, host recellularization remains challenging. In this study, decellularized porcine aortic valves were implanted into the right ventricular outflow tract (RVOT) of sheep to investigate recellularization potential. Porcine aortic valves, decellularized with sodium dodecyl sulfate (SDS), were sterilized by supercritical carbon dioxide (scCO2) and implanted into the RVOT of five juvenile polypay sheep for 5 months (n = 5). During implantation, functionality of the valves was assessed by serial echocardiography, blood tests, and right heart pulmonary artery catheterization measurements. The explanted valves were characterized through gross examination, mechanical characterization, and immunohistochemical analysis including cell viability, phenotype, proliferation, and extracellular matrix generation. Gross examination of the valve cusps demonstrated the absence of thrombosis. Bacterial and fungal stains were negative for pathogenic microbes. Immunohistochemical analysis showed the presence of myofibroblast-like cell infiltration with formation of new collagen fibrils and the existence of an endothelial layer at the surface of the explant. Analysis of cell phenotype and morphology showed no lymphoplasmacytic infiltration. Tensile mechanical testing of valve cusps revealed an increase in stiffness while strength was maintained during implantation. The increased tensile stiffness confirms the recellularization of the cusps by collagen synthesizing cells. The current study demonstrated the feasibility of the trans-species implantation of a non-fixed decellularized porcine aortic valve into the RVOT of sheep. The implantation resulted in recellularization of the valve with sufficient hemodynamic function for the 5-month study. Thus, the study supports a potential role for use of a TEHV for the treatment of valve disease in humans.
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