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Butts RJ, Toombs L, Kirklin JK, Schumacher KR, Conway J, West SC, Auerbach S, Bansal N, Zhao H, Cantor RS, Nandi D, Peng DM. Waitlist Outcomes for Pediatric Heart Transplantation in the Current Era: An Analysis of the Pediatric Heart Transplant Society Database. Circulation 2024; 150:362-373. [PMID: 38939965 DOI: 10.1161/circulationaha.123.068189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Accepted: 05/22/2024] [Indexed: 06/29/2024]
Abstract
BACKGROUND Waitlist mortality (WM) remains elevated in pediatric heart transplantation. Allocation policy is a potential tool to help improve WM. This study aims to identify patients at highest risk for WM to potentially inform future allocation policy changes. METHODS The Pediatric Heart Transplant Society database was queried for patients <18 years of age indicated for heart transplantation between January 1, 2010 to December 31, 2021. Waitlist mortality was defined as death while awaiting transplant or removal from the waitlist due to clinical deterioration. Because WM is low after the first year, analysis was limited to the first 12 months on the heart transplant list. Kaplan-Meier analysis and log-rank testing was conducted to compare unadjusted survival between groups. Cox proportional hazard models were created to determine risk factors for WM. Subgroup analysis was performed for status 1A patients based on body surface area (BSA) at time of listing, cardiac diagnosis, and presence of mechanical circulatory support. RESULTS In total 5974 children met study criteria of which 3928 were status 1A, 1012 were status 1B, 963 were listed status 2, and 65 were listed status 7. Because of the significant burden of WM experienced by 1A patients, further analysis was performed in only patients indicated as 1A. Within that group of patients, those with smaller size and lower eGFR had higher WM, whereas those patients without congenital heart disease or support from a ventricular assist device (VAD) at time of listing had decreased WM. In the smallest size cohort, cardiac diagnoses other than dilated cardiomyopathy were risk factors for WM. Previous cardiac surgery was a risk factor in the 0.3 to 0.7 m2 and >0.7 m2 BSA groups. VAD support was associated with lower WM other than in the single ventricle cohort, where VAD was associated with higher WM. Extracorporeal membrane oxygenation and mechanical ventilation were associated with increased risk of WM in all cohorts. CONCLUSIONS There is significant variability in WM among status-1A patients. Potential refinements to current allocation system should factor in the increased WM risk we identified in patients supported by extracorporeal membrane oxygenation or mechanical ventilation, single ventricle congenital heart disease on VAD support and small children with congenital heart disease, restrictive cardiomyopathy, or hypertrophic cardiomyopathy.
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Affiliation(s)
- Ryan J Butts
- University of Texas Southwestern, Department of Pediatrics, Division of Cardiology, Dallas (R.J.B.)
| | - Leah Toombs
- Children's Medical Center of Dallas, TX (L.T.)
| | | | - Kurt R Schumacher
- University of Michigan, Department of Pediatrics, Division of Cardiology, Ann Arbor (K.R.S., D.M.P.)
| | - Jennifer Conway
- Stollery Childrens, Department of Pediatrics, Division of Cardiology, Edmonton, Alberta, Canada (J.C.)
| | - Shawn C West
- Children's Hospital of Pittsburgh, Department of Pediatrics, Division of Cardiology, PA (S.C.W.)
| | - Scott Auerbach
- Children's Hospital of Colorado, Department of Pediatrics, Division of Cardiology, Aurora (S.A.)
| | - Neha Bansal
- Mount Sinai Kravis Children's Hospital, Department of Pediatrics, Division of Cardiology, New York (N.B.)
| | - Hong Zhao
- Kirklin Solutions, Hoover, AL (J.K.K., H.Z., R.S.C.)
| | - Ryan S Cantor
- Kirklin Solutions, Hoover, AL (J.K.K., H.Z., R.S.C.)
| | - Deipanjan Nandi
- Nationwide Children's Hospital, Department of Pediatrics, Division of Cardiology, Columbus, OH (D.N.)
| | - David M Peng
- University of Michigan, Department of Pediatrics, Division of Cardiology, Ann Arbor (K.R.S., D.M.P.)
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2
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Hollander SA. Partial heart transplantation: A procedure still finding its place. Pediatr Transplant 2024; 28:e14745. [PMID: 38623883 DOI: 10.1111/petr.14745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/07/2024] [Accepted: 03/08/2024] [Indexed: 04/17/2024]
Affiliation(s)
- Seth A Hollander
- Department of Pediatrics (Cardiology), Stanford University School of Medicine, Palo Alto, California, USA
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3
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Amdani S, Deshpande SR, Liu W, Urschel S. Impact of the Pediatric ABO Policy Change on Listings, Transplants, and Outcomes for Children Younger Than 2 Years Listed for Heart Transplantation in the United States. J Card Fail 2024; 30:476-485. [PMID: 37328049 DOI: 10.1016/j.cardfail.2023.06.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 06/08/2023] [Accepted: 06/08/2023] [Indexed: 06/18/2023]
Abstract
BACKGROUND We assessed the impact of the liberalized ABO pediatric policy change on candidate characteristics and outcomes for children undergoing heart transplant (HT). METHODS AND RESULTS Children <2 years undergoing HT with ABO strategy reported at listing and HT from December 2011 to November 2020 to the Scientific Registry of Transplant Recipients database were included. Characteristics at listing, HT, and outcomes during the waitlist and post-transplant were compared before the policy change (December 16, 2011 to July 6, 2016), and after the policy change (July 7, 2016 to November 30, 2020). The percentage of ABO-incompatible (ABOi) listings did not increase immediately after the policy change (P = .93); however, ABOi transplants increased by 18% (P < .0001). At listing, both before and after the policy change, ABOi candidates had higher urgency status, renal dysfunction, lower albumin, and required more cardiac support (intravenous inotropes, mechanical ventilation) than those listed ABO compatible (ABOc). On multivariable analysis, there were no differences in waitlist mortality between children listed as ABOi and ABOc before the policy change (adjusted hazard ratio [aHR] 0.80, 95% confidence interval [CI] 0.61-1.05, P = .10) or after the policy change (aHR 1.2, 95% CI 0.85-1.6, P = .33). Post-transplant graft survival was worse for ABOi transplanted children before the policy change (aHR 1.8, 95% CI 1.1-2.8, P = .014), but not significantly different after the policy change (aHR 0.94, 95% CI 0.61-1.4, P = .76). After the policy change, ABOi listed children had significantly shorter waitlist times (P < .05). CONCLUSIONS The recent pediatric ABO policy change has significantly increased the percentage of ABOi transplantations and decreased waitlist times for children listed ABOi. This change in policy has resulted in broader applicability and actual performance of ABOi transplantation with equal access to ABOi or ABOc organs, and thus eliminated the potential disadvantage of only secondary allocation to ABOi recipients.
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Affiliation(s)
- Shahnawaz Amdani
- Department of Cardiology, Cleveland Clinic Children's Hospital, Cleveland, Ohio.
| | - Shriprasad R Deshpande
- Department of Cardiology, Children's National Heart Institute, Children's National Hospital, The George Washington University School of Medicine and Health Sciences, Washington, DC
| | - Wei Liu
- Department of Quantitative Health Sciences, Cleveland Clinic, Cleveland, Ohio
| | - Simon Urschel
- Division of Pediatric Cardiology, Department of Pediatrics, University of Alberta, Edmonton, Alberta, Canada
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4
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Cooper DKC, Cozzi E. Clinical Pig Heart Xenotransplantation-Where Do We Go From Here? Transpl Int 2024; 37:12592. [PMID: 38371908 PMCID: PMC10869462 DOI: 10.3389/ti.2024.12592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Accepted: 01/15/2024] [Indexed: 02/20/2024]
Affiliation(s)
- David K. C. Cooper
- Center for Transplantation Sciences, Massachusetts General Hospital and Harvard Medical School, Boston, MA, United States
| | - Emanuele Cozzi
- Department of Cardiac, Thoracic and Vascular Sciences, Padua University Hospital, Padova, Italy
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5
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Frandsen EL, Schauer JS, Morray BH, Mauchley DC, McMullan DM, Friedland-Little JM, Kemna MS. Applying the Hybrid Concept as a Bridge to Transplantation in Infants Without Hypoplastic Left Heart Syndrome. Pediatr Cardiol 2024; 45:323-330. [PMID: 37707592 PMCID: PMC10821822 DOI: 10.1007/s00246-023-03294-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Accepted: 08/29/2023] [Indexed: 09/15/2023]
Abstract
Therapies to support small infants in decompensated heart failure that are failing medical management are limited. We have used the hybrid approach, classically reserved for high-risk infants with single ventricle physiology, in patients with biventricular physiology with left ventricular failure. This approach secures systemic circulation, relieves left atrial hypertension, protects the pulmonary vasculature, and allows the right ventricle to support cardiac output. This approach can be used as a bridge to transplantation in select individuals. Infants without single ventricle congenital heart disease who were treated with the hybrid approach between 2008 and 2021 were included in analysis. Eight patients were identified. At the time of hybrid procedure, the median weight was 3.2 kg (range 2.4-3.6 kg) and the median age was 18 days (range 1-153 days). Seventy five percent were mechanically ventilated and 88% were on inotropic support. The median duration from hybrid procedure to transplant was 63 days (range 4-116 days). All patients experienced a good outcome (delisted for improvement or transplanted). The hybrid procedure is an appropriate therapeutic bridge to transplantation in a carefully selected subset of critically ill infants without single ventricle congenital heart disease in whom alternate therapies may confer increased risk for morbidity and mortality.
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Affiliation(s)
- Erik L Frandsen
- Division of Cardiology, Loma Linda University Children's Hospital, 11234 Anderson St, Rm 4431., Loma Linda, CA, 92354, USA.
| | - Jenna S Schauer
- Division of Cardiology, Seattle Children's Hospital, Seattle, WA, USA
| | - Brian H Morray
- Division of Cardiology, Seattle Children's Hospital, Seattle, WA, USA
| | - David C Mauchley
- Department of Cardiac Surgery, Seattle Children's Hospital, Seattle, WA, USA
| | - David M McMullan
- Department of Cardiac Surgery, Seattle Children's Hospital, Seattle, WA, USA
| | | | - Mariska S Kemna
- Division of Cardiology, Seattle Children's Hospital, Seattle, WA, USA
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6
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Lee JY, Kidambi S, Zawadzki RS, Rosenthal DN, Dykes JC, Nasirov T, Ma M. Weight Matching in Infant Heart Transplantation: A National Registry Analysis. Ann Thorac Surg 2023; 116:1241-1248. [PMID: 35835207 PMCID: PMC10321673 DOI: 10.1016/j.athoracsur.2022.05.067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Revised: 04/26/2022] [Accepted: 05/31/2022] [Indexed: 11/01/2022]
Abstract
BACKGROUND Infants account for a significant proportion of pediatric heart transplantation but also suffer from a high waitlist mortality. Donor oversizing by weight-based criteria is common practice in transplantation and is prevalent in this group. We sought to analyze the impact of oversizing on outcomes in infants. METHODS Infant heart transplantations reported to the United Network for Organ Sharing from January 1994 to September 2019 were retrospectively analyzed. 2384 heart transplantation recipients were divided into quintiles (Q1-Q5) on the basis of donor-to-recipient weight ratio (DRWR). Multivariate Cox regression was used to estimate the effect of DRWR. The primary end point was graft survival at 1 year. RESULTS The median DRWR for each quintile was 0.90 (0.37-1.04), 1.17 (1.04-1.29), 1.43 (1.29-1.57), 1.74 (1.58-1.97), and 2.28 (1.97-5.00). Pairwise comparisons showed improved survival for Q3 and Q4 over each of the bottom 2 quintiles and the top quintile. Regression analyses found that Q3 and Q4 were protective against graft failure compared with the bottom 2 quintiles. There was no difference in hazard among the top 3 quintiles. Significant covariates included primary diagnosis, ischemia time, serum bilirubin level, transplantation year, mechanical ventilation at transplantation, and extracorporeal membrane oxygenation at transplantation. Sex, female-to-male transplantation, and mechanical circulatory support at transplantation were not significant in univariate analyses. CONCLUSIONS Modest oversizing by DRWR (1.29-1.97) is associated with increased survival and lower risk in infant heart transplantation. Additional investigation is needed to establish best practices for size matching in this population.
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Affiliation(s)
- James Y Lee
- Division of Pediatric Cardiac Surgery, Department of Cardiothoracic Surgery, Stanford University School of Medicine, Palo Alto, California
| | - Sumanth Kidambi
- Division of Pediatric Cardiac Surgery, Department of Cardiothoracic Surgery, Stanford University School of Medicine, Palo Alto, California
| | - Roy S Zawadzki
- Department of Statistics, Donald Bren School of Information and Computer Sciences, University of California, Irvine, California
| | - David N Rosenthal
- Division of Pediatric Cardiology, Department of Pediatrics, Stanford University School of Medicine, Palo Alto, California
| | - John C Dykes
- Division of Pediatric Cardiology, Department of Pediatrics, Stanford University School of Medicine, Palo Alto, California
| | - Teimour Nasirov
- Division of Pediatric Cardiac Surgery, Department of Cardiothoracic Surgery, Stanford University School of Medicine, Palo Alto, California
| | - Michael Ma
- Division of Pediatric Cardiac Surgery, Department of Cardiothoracic Surgery, Stanford University School of Medicine, Palo Alto, California.
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7
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Alsoufi B, Kozik D, Lambert AN, Wilkens S, Trivedi J, Deshpande S. Increasing donor-recipient weight mismatch in infant heart transplantation is associated with shorter waitlist duration and no increased morbidity or mortality. Eur J Cardiothorac Surg 2023; 64:ezad316. [PMID: 37701977 DOI: 10.1093/ejcts/ezad316] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 08/01/2023] [Accepted: 09/12/2023] [Indexed: 09/14/2023] Open
Abstract
OBJECTIVES Infants awaiting paediatric heart transplantation (PHT) experience long waitlist duration and high mortality due to donor shortage. Using the United Network for Organ Sharing database, we explored if increasing donor-recipient weight ratio (DRWR) >2.0 (recommended cutoff) was associated with adverse outcomes. METHODS Between 2007 and 2020, 1392 infants received PHT. We divided cohort into 3 groups: A (DRWR ≤1.0, n = 239, 17%), B (DRWR 1.0-2.0, n = 947, 68%), C (DRWR >2.0, n = 206, 15%). Group characteristics and PHT outcomes were analysed. RESULTS DRWR ranged between 0.5 and 4.1. Underlying pathology (congenital versus cardiomyopathy), gender, race, renal function and mechanical circulatory support were comparable between groups. Group C patients were more likely to be ventilated, to receive ABO blood group (ABO)-incompatible heart and to have longer donor ischaemic time. Waitlist duration was significantly shorter for group C (33 vs 50 days, P < 0.1). Early outcomes for groups A, B and C were the following (respectively): operative death (6%, 4%, 3%, P = 0.29), primary graft dysfunction (5%, 3%, 3%, P = 0.30), renal failure (10%, 7%, 7%, P = 0.42) and stroke (3%, 4%, 1%, P = 0.36). The DRWR group was not associated with operative death in either congenital (odds ratio (OR) = 0.819, 95% confidence interval (CI) = 0.523-1.282) or cardiomyopathy (OR = 1.221, 95% CI = 0.780-1.912) patients and only significant factor was pre-PHT extracorporeal membrane oxygenation (OR = 4.400, 95% CI = 2.761-7.010). Additionally, survival at 1 year (87%, 87%, 85%, P = 0.80) and 5 years (76%, 78%, 77%, P = 0.80) was comparable between the DRWR groups. CONCLUSIONS Infants who received PHT with DRWR >2.0, up to 4.1, experienced shorter waitlist duration with no demonstrable increase in peri-transplant complications, operative or late mortality. Historic practice to avoid DRWR > 2.0 due to complications (e.g. hypertension-related stroke, graft dysfunction, death) is not currently supported in infants and stretching DRWR acceptance criteria would decrease PHT waitlist duration and potentially improve waitlist complications and mortality.
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Affiliation(s)
- Bahaaldin Alsoufi
- Department of Cardiothoracic Surgery, University of Louisville and Norton Children's Hospital, Louisville, KY, USA
| | - Deborah Kozik
- Department of Cardiothoracic Surgery, University of Louisville and Norton Children's Hospital, Louisville, KY, USA
| | - Andrea Nicole Lambert
- Department of Pediatrics, University of Louisville and Norton Children's Hospital, Louisville, KY, USA
| | - Sarah Wilkens
- Department of Pediatrics, University of Louisville and Norton Children's Hospital, Louisville, KY, USA
| | - Jaimin Trivedi
- Department of Cardiothoracic Surgery, University of Louisville and Norton Children's Hospital, Louisville, KY, USA
| | - Shriprasad Deshpande
- Department of Cardiology and Cardiac Critical Care, Children's National Hospital, Washington, DC, USA
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8
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Hayes EA, Walczak AB, Goodhue Meyer E, Nicol K, Deitemyer M, Duffy V, Moore Padilla M, Gajarski RJ, Nandi D. An in vitro comparison of intra-operative isohemagglutinin and human leukocyte antigen removal techniques in pediatric heart transplantation. THE JOURNAL OF EXTRA-CORPOREAL TECHNOLOGY 2023; 55:189-193. [PMID: 38099633 PMCID: PMC10723569 DOI: 10.1051/ject/2023034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Accepted: 08/21/2023] [Indexed: 12/17/2023]
Abstract
BACKGROUND Highly sensitized pediatric patients awaiting heart transplantation experience longer wait times and thus higher waitlist mortality. Similarly, children less than 2 years of age have increased waitlist times and mortality when compared to their older peers. To improve the likelihood of successful transplantation in these patients, various strategies have been utilized, including peri-operative plasmapheresis. However, limited data exists comparing plasmapheresis techniques for antibody reduction. This study's aim was to compare the in vitro magnitude of isohemagglutinin titers (IT) and human leukocyte antigen (HLA) antibody removal and the time required between membrane-based plasmapheresis (MP) and centrifuge-based plasmapheresis (CP) incorporated into the extracorporeal (EC) circuit. METHODS Two MP (Prismaflex) and two CP (Spectra Optia, Terumo BCT) circuits were incorporated into four separate EC circuits primed with high titer, highly sensitized type O donor whole blood. Assays were performed to determine baseline IT and anti-HLA antibodies and then at 30-minute increments until completion of the run (two plasma volume exchanges) at two hours. RESULTS There was a decrease in anti-A and anti-B IgM and IgG titers with both MP and CP. Mean anti-A and anti-B titer reduction was by 4.625 titers (93.7% change) and 4.375 titers (93.8% change) using MP and CP, respectively. At 2 h of apheresis, CP reduced 62.5% of all ITs to ≤ 1:4, while MP reduced 50% of ITs to ≤ 1:4. Additionally, reduction of anti-HLA class II antibody to mean fluorescence intensity (MFI) <3000 was achieved with both MP and CP. At 2 h of apheresis, CP reduced MFI by 2-3.5 fold and MP reduced MFI by 1.7-2.5 fold. Both demonstrated similar hemolytic and thrombotic profiles. CONCLUSIONS In this in vitro plasmapheresis model of IT and anti-HLA antibody reduction, both MP and CP incorporated into the EC circuit can be used quickly and effectively to reduce circulating antibodies. While CP may have some greater efficiency, further study is necessary to verify this in vivo.
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Affiliation(s)
- Emily A. Hayes
- The Heart Center, Nationwide Children’s Hospital Columbus OH 43205 USA
| | - Ashley B Walczak
- The Heart Center, Nationwide Children’s Hospital Columbus OH 43205 USA
| | - Erin Goodhue Meyer
- Department of Hematology/Apheresis, Nationwide Children’s Hospital Columbus OH 43205 USA
| | - Kathleen Nicol
- Department of Pathology, Nationwide Children’s Hospital Columbus OH 43205 USA
| | - Matthew Deitemyer
- The Heart Center, Nationwide Children’s Hospital Columbus OH 43205 USA
| | - Vicky Duffy
- The Heart Center, Nationwide Children’s Hospital Columbus OH 43205 USA
| | - Michelle Moore Padilla
- Division of Cardiology, Department of Pediatrics, Emory University School of Medicine Atlanta GA 30322 USA
| | | | - Deipanjan Nandi
- The Heart Center, Nationwide Children’s Hospital Columbus OH 43205 USA
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9
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Raymundo S, Wilhalme H, Chaudhary A, Karunungan K, Alejos J, Srivastava N. Pediatric risk to orthotopic heart transplant (PRO) score: Insights from United Network for Organ Sharing (UNOS) waitlist mortality findings. Pediatr Transplant 2023; 27:e14525. [PMID: 37439081 PMCID: PMC10524703 DOI: 10.1111/petr.14525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 01/31/2023] [Accepted: 02/24/2023] [Indexed: 07/14/2023]
Abstract
BACKGROUND Pediatric heart transplant candidates on the waitlist have the highest mortality rate among all solid organ transplants. A risk score incorporating a candidate's individual risk factors may better predict mortality on the waitlist and optimize organ allocation to the sickest of those awaiting transplant. METHODS Using the United Network for Organ Sharing (UNOS) database, we evaluated a total of 5542 patients aged 0-18 years old on the waitlist for a single, first time, heart transplant from January 2010 to June 2019. We performed a univariate analysis on two-thirds (N = 3705) of these patients to derive the factors most associated with waitlist mortality or delisting secondary to deterioration within 1 year. Those with a p <0.2 underwent a multivariate analysis and the resulting factors were used to build a prediction model using the Fine-Grey model analysis. This predictive scoring model was then validated on the remaining one-third of the patients (N = 1852). RESULTS The Pediatric Risk to OHT (PRO) scoring model utilizes the following unique patient variables: blood type, diagnosis of congenital heart disease, weight, presence of ventilator support, presence of inotropic support, extracorporeal membrane oxygenation (ecmo) status, creatinine level, and region. A higher score indicates an increased risk of mortality. The PRO score had a predictive strength of 0.762 as measured by area under the ROC curve at 1 year. CONCLUSION The PRO score is an improved predictive model with the potential to better assess mortality for patients awaiting heart transplant.
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Affiliation(s)
| | - Holly Wilhalme
- University of California Los Angeles Department of Medicine Statistics Core
| | | | | | - Juan Alejos
- University of California Los Angeles Mattel Children’s Hospital
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10
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Kadowaki S, Siraj MA, Chen W, Wang J, Parker M, Nagy A, Steve Fan C, Runeckles K, Li J, Kobayashi J, Haller C, Husain M, Honjo O. Cardioprotective Actions of a Glucagon-like Peptide-1 Receptor Agonist on Hearts Donated After Circulatory Death. J Am Heart Assoc 2023; 12:e027163. [PMID: 36695313 PMCID: PMC9973624 DOI: 10.1161/jaha.122.027163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Background Heart transplantation with a donation after circulatory death (DCD) heart is complicated by substantial organ ischemia and ischemia-reperfusion injury. Exenatide, a glucagon-like peptide-1 receptor agonist, manifests protection against cardiac ischemia-reperfusion injury in other settings. Here we evaluate the effects of exenatide on DCD hearts in juvenile pigs. Methods and Results DCD hearts with 15-minutes of global warm ischemia after circulatory arrest were reperfused ex vivo and switched to working mode. Treatment with concentration 5-nmol exenatide was given during reperfusion. DCD hearts treated with exenatide showed higher myocardial oxygen consumption (exenatide [n=7] versus controls [n=7], over 60-120 minutes of reperfusion, P<0.001) and lower cardiac troponin-I release (27.94±11.17 versus 42.25±11.80 mmol/L, P=0.04) during reperfusion compared with controls. In working mode, exenatide-treated hearts showed better diastolic function (dp/dt min: -3644±620 versus -2193±610 mm Hg/s, P<0.001; Tau: 15.62±1.78 versus 24.59±7.35 milliseconds, P=0.02; lateral e' velocity: 11.27 ± 1.46 versus 7.19±2.96, P=0.01), as well as lower venous lactate levels (3.17±0.75 versus 5.17±1.44 mmol/L, P=0.01) compared with controls. Higher levels of activated endothelial nitric oxide synthase (phosphorylated to total endothelial nitric oxide synthase levels: 2.71±1.16 versus 1.37±0.35, P=0.02) with less histological evidence of endothelial damage (von Willebrand factor expression: 0.024±0.007 versus 0.331±0.302, pixel/μm, P=0.04) was also observed with exenatide treatment versus controls. Conclusions Acute treatment of DCD hearts with exenatide limits myocardial and endothelial injury and improves donor cardiac function.
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Affiliation(s)
- Sachiko Kadowaki
- Division of Cardiovascular SurgeryThe Hospital for Sick ChildrenTorontoOntarioCanada,Department of SurgeryUniversity of TorontoTorontoOntarioCanada
| | - M. Ahsan Siraj
- Department of Medicine, Ted Rogers Centre for Heart Research, Peter Munk Cardiac CentreUniversity of TorontoTorontoOntarioCanada
| | - Weiden Chen
- Division of Cardiovascular SurgeryThe Hospital for Sick ChildrenTorontoOntarioCanada,Department of SurgeryUniversity of TorontoTorontoOntarioCanada,Department of Cardiac SurgeryGuangzhou Women and Children’s Medical CenterGuangzhouChina
| | - Jian Wang
- Division of Perfusion ServicesThe Hospital for Sick ChildrenTorontoOntarioCanada
| | - Marlee Parker
- Division of Perfusion ServicesThe Hospital for Sick ChildrenTorontoOntarioCanada
| | - Anita Nagy
- Division of PathologyThe Hospital for Sick ChildrenTorontoOntarioCanada
| | - Chun‐Po Steve Fan
- Ted Rogers Centre for Heart Research, Peter Munk Cardiac Centre, Labatt Family Heart CentreUniversity Health Network, The Hospital for Sick ChildrenTorontoOntarioCanada
| | - Kyle Runeckles
- Ted Rogers Centre for Heart Research, Peter Munk Cardiac Centre, Labatt Family Heart CentreUniversity Health Network, The Hospital for Sick ChildrenTorontoOntarioCanada
| | - Jing Li
- Division of Cardiovascular SurgeryThe Hospital for Sick ChildrenTorontoOntarioCanada,Department of SurgeryUniversity of TorontoTorontoOntarioCanada
| | - Junko Kobayashi
- Division of Cardiovascular SurgeryThe Hospital for Sick ChildrenTorontoOntarioCanada,Department of SurgeryUniversity of TorontoTorontoOntarioCanada,Department of Cardiovascular SurgeryOkayama University HospitalOkayamaJapan,Department of Cardiovascular SurgeryFaculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama UniversityOkayamaJapan
| | - Christoph Haller
- Division of Cardiovascular SurgeryThe Hospital for Sick ChildrenTorontoOntarioCanada,Department of SurgeryUniversity of TorontoTorontoOntarioCanada
| | - Mansoor Husain
- Department of Medicine, Ted Rogers Centre for Heart Research, Peter Munk Cardiac CentreUniversity of TorontoTorontoOntarioCanada
| | - Osami Honjo
- Division of Cardiovascular SurgeryThe Hospital for Sick ChildrenTorontoOntarioCanada,Department of SurgeryUniversity of TorontoTorontoOntarioCanada
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11
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Greenberg JW, Raees MA, Dani A, Heydarian HC, Chin C, Zafar F, Lehenbauer DG, Morales DLS. Palliated Hypoplastic Left Heart Syndrome Patients Experience Superior Waitlist and Comparable Post-Heart Transplant Survival to Non-Single Ventricle Congenital Heart Disease Patients. Semin Thorac Cardiovasc Surg 2022; 36:230-241. [PMID: 36455711 PMCID: PMC10225473 DOI: 10.1053/j.semtcvs.2022.08.019] [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: 08/22/2022] [Accepted: 08/31/2022] [Indexed: 11/30/2022]
Abstract
Congenital heart disease (CHD) is a well-established risk factor for inferior waitlist and post-heart transplant survival in children. Differences in outcomes between CHD subgroups are understudied. The present study compared outcomes for palliated hypoplastic left heart syndrome (HLHS) patients to other non-single ventricle CHD (non-SVCHD) and non-CHD patients. United Network for Organ Sharing was used to identify children (age < 18) listed for heart transplant in the United States between 2016 and 2021. CHD sub-diagnoses were only available for United Network for Organ Sharing status 1a after 2015, thereby defining the cohort. Waitlist outcomes were studied using competing-risk time-to-event analysis for transplantation, mortality/decompensation, and alive-on-waitlist. Multivariable Cox proportional hazards regression analyses were used to identify factors associated with inferior post-transplant survival. Patients included: palliated-HLHS (n = 477), non-SVCHD (n = 686), and non-CHD (n = 1261). At listing, Palliated-HLHS patients were older than non-SVCHD (median 2-year [IQR 0-8] vs median 0-year [0-3], respectively) and younger than non-CHD (median 7-year [0-14]) (P < 0.001 vs both), and were more likely to be white (P < 0.01 vs both). Upon time-to-event analysis, rates of waitlist mortality/decompensation rates were greater among non-SVCHD than palliated-HLHS. Post-transplant survival was comparable between palliated-HLHS and non-SVCHD (P = 0.920) but worse compared to non-CHD (P < 0.001). Both palliated-HLHS (HR 2.40 [95% CI 1.68-3.42]) and non-SVSCHD (2.04 [1.39-2.99]) were independently associated with post-transplant mortality. Palliated-HLHS patients with heart failure experience significantly worse post-transplant outcomes than non-CHD but, compared to other CHD patients, experience superior waitlist and comparable post-transplant survival. While a high-risk cohort, HLHS patients can achieve gratifying waitlist and post-transplant survival.
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Affiliation(s)
- Jason W Greenberg
- The Heart Institute, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, Ohio.
| | - Muhammad Aanish Raees
- The Heart Institute, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, Ohio
| | - Alia Dani
- The Heart Institute, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, Ohio
| | - Haleh C Heydarian
- The Heart Institute, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, Ohio
| | - Clifford Chin
- The Heart Institute, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, Ohio
| | - Farhan Zafar
- The Heart Institute, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, Ohio
| | - David G Lehenbauer
- The Heart Institute, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, Ohio
| | - David L S Morales
- The Heart Institute, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, Ohio
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Greenberg JW, Kulshrestha K, Dani A, Winlaw DS, Lehenbauer DG, Chin C, Lorts A, Gist KM, Zafar F, Morales DLS. Not all durations of preheart transplant mechanical ventilation portend inferior post-transplant survival in children. Pediatr Transplant 2022; 27:e14433. [PMID: 36345131 DOI: 10.1111/petr.14433] [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: 09/06/2022] [Revised: 09/28/2022] [Accepted: 09/29/2022] [Indexed: 11/10/2022]
Abstract
BACKGROUND Mechanical ventilation prior to pediatric heart transplantation predicts inferior post-transplant survival, but the impact of ventilation duration on survival is unclear. METHODS Data from the United Network for Organ Sharing and Pediatric Health Information System were used to identify pediatric (<18 years) heart transplant recipients from 2003 to 2020. Patients ventilated pretransplant were first compared to no ventilation, then ventilation durations were compared across quartiles of ventilation (≤1 week, 8 days-5 weeks, >5 weeks). RESULTS At transplant, 11% (511/4506) of patients required ventilation. Ventilated patients were younger, had more congenital heart disease, more urgent listing-status, and greater rates of nephropathy, TPN-dependence, and inotrope and ECMO requirements (p < .001 for all). Post-transplant, previously ventilated patients experienced longer ventilation durations, ICU and hospital stays, and inferior survival (all p < .001). Hospital outcomes and survival worsened with longer pretransplant ventilation. One-year and overall survival were similar between the no-ventilation and ≤1 week groups (p = .703 & p = .433, respectively) but were significantly worse for ventilation durations >1 week (p < .001). On multivariable analysis, ventilation ≤1 week did not predict mortality (HR 0.98 [95% CI 0.85-1.43]), whereas ventilation >1 week did (HR: 1.18 [1.01-1.39]). CONCLUSIONS Longer pretransplant ventilation portends worse outcomes, although only ventilation >1 week predicts mortality. These findings can inform pretransplant prognostication.
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Affiliation(s)
- Jason W Greenberg
- The Heart Institute, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Kevin Kulshrestha
- The Heart Institute, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Alia Dani
- The Heart Institute, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - David S Winlaw
- The Heart Institute, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - David G Lehenbauer
- The Heart Institute, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Clifford Chin
- The Heart Institute, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Angela Lorts
- The Heart Institute, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Katja M Gist
- The Heart Institute, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Farhan Zafar
- The Heart Institute, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - David L S Morales
- The Heart Institute, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
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13
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Greenberg JW, Tweddell JS, Winlaw DS, Lehenbauer DG, Gist KM, Chin C, Zafar F, Morales DLS. Infants Who Require Total Parenteral Nutrition and Paralytics at Time of Heart Transplant Experience Inferior Post-Transplant Mortality. World J Pediatr Congenit Heart Surg 2022; 13:752-758. [DOI: 10.1177/21501351221119495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Background: Infants experience the worst one-year post-heart transplant (HTx) survival of any other pediatric group. Although mechanical ventilatory (MV) requirement at the time of transplant is an established predictor of post-transplant mortality, the impacts of commonly co-utilized support modalities such as total parenteral nutrition (TPN)-dependence and paralytics are understudied. Methods: All infant HTx recipients from 2003 to 2020 in both the United Network for Organ Sharing and Pediatric Health Information System databases were identified (n = 1344) and categorized depending upon support requirement at the time of transplant—none (59%), MV-only (10%), MV + Paralytics (2%), TPN-dependence-only (15%), MV + TPN (10%), and MV + Paralytics + TPN (4%). The primary study aim was to characterize the impact of TPN-dependence and paralytics on one-year post-transplant survival (PTS). Results: Compared to no-support, supported infants were generally at higher risk and more ill at transplant, with greater rates of congenital heart disease, renal and hepatic dysfunctions, and inotrope requirements. Post-transplant hospital outcomes were inferior among supported patients; all support groups experienced longer post-transplant MV, intensive care unit, and hospital lengths of stay (all P < .05 vs no-support). Upon multivariable analysis, each support modality independently predicted 1-year mortality (MV vs no-MV: 1.54 [1.10-2.14]; MV + Paralytics vs neither: 2.02 [1.25-3.27]; TPN vs no-TPN: 1.53 [1.10-2.13]; P < .01 for all), whereas no-support was protective (HR 0.66 [95% CI 0.48-0.91]). Conclusions: Infants who require paralytics and/or who are TPN-dependent at the time of HTx experience worse one-year PTS. Such knowledge can assist in risk-stratification, and the identification of patients who would benefit from pretransplant optimization.
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Affiliation(s)
- Jason W Greenberg
- The Heart Institute, Cincinnati Children’s Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - James S Tweddell
- The Heart Institute, Cincinnati Children’s Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - David S Winlaw
- The Heart Institute, Cincinnati Children’s Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - David G Lehenbauer
- The Heart Institute, Cincinnati Children’s Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Katja M Gist
- The Heart Institute, Cincinnati Children’s Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Clifford Chin
- The Heart Institute, Cincinnati Children’s Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Farhan Zafar
- The Heart Institute, Cincinnati Children’s Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - David L S Morales
- The Heart Institute, Cincinnati Children’s Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, OH, USA
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14
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Frandsen EL, Banker KA, Mazor RL, McMullan DM, Law YM, Kemna MS, Albers EL, Hong BJ, Friedland-Little JM. Waitlist and posttransplant outcomes of critically ill infants awaiting heart transplantation managed without ventricular assist device support. Pediatr Transplant 2022; 26:e14308. [PMID: 35587026 DOI: 10.1111/petr.14308] [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: 01/03/2022] [Revised: 04/14/2022] [Accepted: 04/27/2022] [Indexed: 10/18/2022]
Abstract
BACKGROUND Infants listed for heart transplant are at high risk for waitlist mortality. While waitlist mortality for children has decreased in the current era of increased ventricular assist device use, outcomes for small infants supported by ventricular assist device remain suboptimal. We evaluated morbidity and survival in critically ill infants listed for heart transplant and managed without ventricular assist device support. METHODS Critically ill infants (requiring ≥1 inotrope and mechanical ventilation or ≥2 inotropes without mechanical ventilation) listed between 2008 and 2019 were included. During the study period, infants were managed primarily medically. Mechanical circulatory support, specifically extracorporeal membrane oxygenation, was utilized as "rescue therapy" for decompensating patients. RESULTS Thirty-two infants were listed 1A, 66% with congenital heart disease. Median age and weight at listing were 2.2 months and 4.4 kg, with 69% weighing <5 kg. At listing, 97% were mechanically ventilated, 41% on ≥2 inotropes, and 25% under neuromuscular blockade. Five patients were supported by ECMO after listing. A favorable outcome (transplant or recovery) was observed in 84%. One-year posttransplant survival was 92%. Infection was the most common waitlist complication occurring in 75%. Stroke was rare, occurring in one patient who was supported on ECMO. Renal function improved from listing to transplant, death, or recovery (eGFR 70 vs 87 ml/min/1.73m2 , p = .001). CONCLUSION A strategy incorporating a high threshold for mechanical circulatory support and acceptance of prolonged mechanical ventilation and neuromuscular blockade can achieve good survival and morbidity outcomes for critically ill infants listed for heart transplant.
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Affiliation(s)
- Erik L Frandsen
- Pediatric Cardiology, Loma Linda University Children's Hospital, Loma Linda, California, United States
| | - Katherine A Banker
- Division of Critical Care, Seattle Children's Hospital, Seattle, Washington, USA
| | - Robert L Mazor
- Division of Critical Care, Seattle Children's Hospital, Seattle, Washington, USA
| | - D Michael McMullan
- Division of Pediatric Cardiac Surgery, Seattle Children's Hospital, Seattle, Washington, USA
| | - Yuk M Law
- Division of Pediatric Cardiology, Seattle Children's Hospital, Seattle, Washington, USA
| | - Mariska S Kemna
- Division of Pediatric Cardiology, Seattle Children's Hospital, Seattle, Washington, USA
| | - Erin L Albers
- Division of Pediatric Cardiology, Seattle Children's Hospital, Seattle, Washington, USA
| | - Borah J Hong
- Division of Pediatric Cardiology, Seattle Children's Hospital, Seattle, Washington, USA
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15
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Singh TP, Cherikh WS, Hsich E, Harhay MO, Hayes D, Perch M, Potena L, Sadavarte A, Zuckermann A, Stehlik J. The International Thoracic Organ Transplant Registry of the International Society for Heart and Lung Transplantation: Twenty-fifth Pediatric Heart Transplantation Report — 2022; Focus on Infant Heart Transplantation. J Heart Lung Transplant 2022; 41:1357-1365. [DOI: 10.1016/j.healun.2022.07.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Accepted: 07/20/2022] [Indexed: 11/24/2022] Open
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16
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Abstract
Heart transplantation (HTx) has a storied past, with origins dating back to the early twentieth century and the first pediatric orthotopic heart transplant performed in 1967 on a neonate with Ebstein abnormality. Today, approximately 500 pediatric HTx are performed annually, with survival times now measured in decades rather than days or weeks. In large part, advances in immunosuppression, critical care, dedicated transplant teams and mechanical circulatory support have paved the way for improvements in waitlist mortality and post-transplant survival, with future directions including the development of intracorporeal ventricular assist devices (VADs) for small children, expanding/standardizing donor criteria, and xenotransplantation.
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17
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Jeung MS, Kim MJ, Huh J, Kang IS, Kim GB, Yu JJ, Song J. The Waiting List Mortality of Pediatric Heart Transplantation Candidates in Korea before the Pediatric Ventricular Assist Device Era. J Korean Med Sci 2021; 36:e283. [PMID: 34783215 PMCID: PMC8593407 DOI: 10.3346/jkms.2021.36.e283] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Accepted: 09/22/2021] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND Despite advancements in heart transplantation for pediatric patients in Korea, the waiting list mortality has not been reported. Therefore, we investigated the waiting list mortality rate and factors associated with patient mortality. METHODS We reviewed the medical records of pediatric patients who were registered for heart transplantation at three major hospitals in Korea from January 2000 to January 2020. All patients who died while waiting for heart transplantation were investigated, and we identified the waiting list mortality rate, causes of mortality and median survival periods depending on the variable risk factors. RESULTS A total of 145 patients received heart transplantations at the three institutions we surveyed, and the waiting list mortality rate was 26%. The most common underlying diseases were cardiomyopathy (66.7%) and congenital heart disease (30.3%). The leading causes that contributed to death were heart failure (36.3%), multi-organ failure (27.2%), and complications associated with extracorporeal membrane oxygenation (ECMO) (25.7%). The median survival period was 63 days. ECMO was applied in 30 patients. The different waiting list mortality percentages according to age, cardiac diagnosis, use of ECMO, and initial Korean Network of Organ Sharing (KONOS) level were determined using univariate analysis, but age was the only significant factor associated with waiting list mortality based on a multivariate analysis. CONCLUSION The waiting list mortality of pediatric heart transplantation candidates was confirmed to be considerably high, and age, underlying disease, the application of ECMO, and the initial KONOS level were the factors that influenced the survival period.
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Affiliation(s)
- Min Sub Jeung
- Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Mi Jin Kim
- Department of Pediatrics, Asan Medical Center, Seoul, Korea
| | - June Huh
- Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - I-Seok Kang
- Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Gi Beom Kim
- Department of Pediatrics, Seoul National University Children's Hospital, Seoul, Korea
| | - Jeong Jin Yu
- Department of Pediatrics, Asan Medical Center, Seoul, Korea
| | - Jinyoung Song
- Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
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18
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Infant Heart Transplant: Begin With the End in Mind. ASAIO J 2021; 67:1060-1061. [PMID: 34437330 DOI: 10.1097/mat.0000000000001561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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19
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Donné M, De Pauw M, Vandekerckhove K, Bové T, Panzer J. Ethical and practical dilemmas in cardiac transplantation in infants: a literature review. Eur J Pediatr 2021; 180:2359-2365. [PMID: 33959817 DOI: 10.1007/s00431-021-04100-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Revised: 04/29/2021] [Accepted: 05/02/2021] [Indexed: 01/11/2023]
Abstract
The waiting time in infants for a cardiac transplant remains high, due to the scarcity of donors. Consequently, waiting list morbidity and mortality are higher than those in other age groups. Therefore, the decision to list a small infant for cardiac transplantation is seen as an ethical dilemma by most physicians. This review aims to describe outcomes, limitations, and ethical considerations in infant heart transplantation. We used Medline and Embase as data sources. We searched for publications on infant (< 1 year) heart transplantation, bridge-to-transplant and long-term outcomes, and waiting list characteristics from January 2009 to March 2021. Outcome after cardiac transplant in infants is better than that in older children (1-year survival 88%), and complications are less frequent (25% CAV, 10% PTLD). The bridge-to-transplant period in infants is associated with increased mortality (32%) and decreased transplantation rate (43%). This is mainly due to MCS complications or the limited MCS options (with 51% mortality in infancy). Outcomes are worse for infants with CHD or in need of ECMO-support.Conclusion: Infants listed for cardiac transplantation have a high morbidity and mortality, especially in the period between diagnosis and transplantation. For those who receive cardiac transplant, the outlook is encouraging. Unfortunately, despite growing experience in VAD, mortality in children < 10 kg and children with CHD remains high. After transplantation, patients carry a psychological burden and there is a probability of re-transplantation later in life, with decreased outcomes compared to primary transplantation. These considerations are seen as an important ethical dilemma in many centers, when considering cardiac transplantation in infants (< 1 year). What is Known: • For infants, waitlist mortality remains high. In the pediatric population, MCS reduces the waiting list mortality. What is New: • Outcomes after infant cardiac transplantation are better than other age groups; however, MCS options remain limited, with persistently high waiting list mortality. • Future developments in MCS and alternative options to reduce waiting list mortality such as ABO-incompatible transplantation and pulmonary artery banding are encouraging and will improve ethical decision-making when an infant is in need of a cardiac transplant.
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Affiliation(s)
- Marieke Donné
- Department of Pediatrics, University Hospital of Ghent, Ghent, Belgium
| | - Michel De Pauw
- Department of Cardiology, University Hospital of Ghent, Ghent, Belgium
| | | | - Thierry Bové
- Department of Cardiac Surgery, University Hospital of Ghent, Ghent, Belgium
| | - Joseph Panzer
- Department of Pediatric Cardiology, University Hospital of Ghent, Ghent, Belgium.
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20
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Spinner JA, Denfield SW, Puri K, Morris SA, Costello JM, Moffett BS, Wang Y, Shekerdemian LS, Tunuguntla HP, Price JF, Heinle JS, Adachi I, Dreyer WJ, Cabrera AG. Hospital outcomes for pediatric heart transplant recipients undergoing tracheostomy: A multi-institutional analysis. Pediatr Transplant 2021; 25:e13904. [PMID: 33179431 DOI: 10.1111/petr.13904] [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: 08/26/2020] [Revised: 09/28/2020] [Accepted: 10/02/2020] [Indexed: 11/28/2022]
Abstract
Tracheostomy is associated with increased mortality and resource utilization in children with CHD. However, the prevalence and hospital outcomes of tracheostomy in children with HTx are not known. We describe the prevalence and compare the post-HTx hospital outcomes of pediatric patients with Pre-TT and Post-TT to those without tracheostomy. A multi-institutional retrospective cohort study was performed using the Pediatric Health Information System database. Hospital mortality, mediastinitis, LOS, and costs were compared among patients with Pre-TT, Post-TT, and no tracheostomy. Pre-TT was identified in 29 (1.1%) and Post-TT was identified in 41 (1.6%) of 2603 index HTx hospitalizations. Patients with Pre-TT were younger and more likely to have CHD, a non-cardiac birth defect, or an airway anomaly compared to those without Pre-TT. Pre-TT was not independently associated with increased post-HTx in-hospital mortality. Age at HTx < 1 year, CHD, and Post-TT were associated with increased in-hospital mortality. Pre-TT that occurred during the HTx hospitalization and Post-TT were associated with increased resource utilization. Tracheostomy was not associated with mediastinitis.
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Affiliation(s)
- Joseph A Spinner
- Department of Pediatrics, Lillie Frank Abercrombie Section of Pediatric and Congenital Cardiology, Baylor College of Medicine/Texas Children's Hospital, Houston, TX, USA
| | - Susan W Denfield
- Department of Pediatrics, Lillie Frank Abercrombie Section of Pediatric and Congenital Cardiology, Baylor College of Medicine/Texas Children's Hospital, Houston, TX, USA
| | - Kriti Puri
- Department of Pediatrics, Lillie Frank Abercrombie Section of Pediatric and Congenital Cardiology, Baylor College of Medicine/Texas Children's Hospital, Houston, TX, USA
| | - Shaine A Morris
- Department of Pediatrics, Lillie Frank Abercrombie Section of Pediatric and Congenital Cardiology, Baylor College of Medicine/Texas Children's Hospital, Houston, TX, USA
| | - John M Costello
- Department of Pediatrics, The Medical University of South Carolina, Charleston, SC, USA
| | - Brady S Moffett
- Department of Pediatrics, Lillie Frank Abercrombie Section of Pediatric and Congenital Cardiology, Baylor College of Medicine/Texas Children's Hospital, Houston, TX, USA
| | - Yunfei Wang
- Department of Pediatrics, Cardiovascular Research Core - Section of Cardiology, Baylor College of Medicine/Texas Children's Hospital, Houston, TX, USA
| | - Lara S Shekerdemian
- Division of Critical Care Medicine, Department of Pediatrics, Baylor College of Medicine/Texas Children's Hospital, Houston, TX, USA
| | - Hari P Tunuguntla
- Department of Pediatrics, Lillie Frank Abercrombie Section of Pediatric and Congenital Cardiology, Baylor College of Medicine/Texas Children's Hospital, Houston, TX, USA
| | - Jack F Price
- Department of Pediatrics, Lillie Frank Abercrombie Section of Pediatric and Congenital Cardiology, Baylor College of Medicine/Texas Children's Hospital, Houston, TX, USA
| | - Jeffrey S Heinle
- Division of Congenital Heart Surgery, Department of Surgery, Baylor College of Medicine/Texas Children's Hospital, Houston, TX, USA
| | - Iki Adachi
- Division of Congenital Heart Surgery, Department of Surgery, Baylor College of Medicine/Texas Children's Hospital, Houston, TX, USA
| | - William J Dreyer
- Department of Pediatrics, Lillie Frank Abercrombie Section of Pediatric and Congenital Cardiology, Baylor College of Medicine/Texas Children's Hospital, Houston, TX, USA
| | - Antonio G Cabrera
- Division of Pediatric Cardiology, Department of Pediatrics/Primary Children's Hospital Heart Center, University of Utah, Salt Lake City, UT, USA
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21
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Das B, Trivedi JR, Sinha P, Ramakrishnan K, Alsoufi B, Deshpande SR. Interplay between donor and recipient factors impacts outcomes after pediatric heart transplantation: An analysis from the united network for organ sharing database. Pediatr Transplant 2021; 25:e13912. [PMID: 33245837 DOI: 10.1111/petr.13912] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 10/08/2020] [Accepted: 10/10/2020] [Indexed: 02/06/2023]
Abstract
BACKGROUND Donor utilization rates continue to be low for pHT, however, efforts to expand the donor acceptance criteria have shown mixed results in single-institution studies in pediatric and adult transplantation. Purpose of this study is to assess impact of individual and cumulative donor risk factors on transplant outcomes as well as the interplay between donor and recipient risk factors as it relates to transplant outcomes. METHOD We analyzed pHT UNOS data (2008-2018) to compare the recipient characteristics, donor characteristics, and outcomes based on donor ejection fraction of less than 50% (low EF) and or ischemic time of greater than 4 hours (prolonged IT). RESULTS A total of 4345 pHT were performed of which 1309 (30.1%) were with prolonged IT and 122 (2.8%) in low EF. Additionally, 58 (1.3%) were performed with both low EF and prolonged IT (combined risk). Rest (2856 patients, 65.7%) was considered low risk. Recipients of combined risk were more likely to be younger, have post-surgical congenital heart disease, be on ECMO or ventilator but less likely on VAD (all P < .01) compared with any other group. Waitlist time was significantly lower for low EF (mean 39 days, 15-109) or combined risk group (36 days, range 15-80) compared with other groups (60 days, range 23-125) (P = .01). 1-year mortality was 8% in low-risk group, 12% in prolonged IT, 14% in reduced EF, and 28% in combined risk patients (P < .01). Number of treated rejections in one year were significantly higher in prolonged IT and combined risk group compared to other groups (P < .01). When stratified by recipient risk, there was no difference in outcomes for low risk, prolonged IT, or low EF groups; however, there were significant survival differences for high-risk recipient versus low-risk recipient in each donor group. CONCLUSION Lower EF donors performed similar to prolonged IT donor, but were uncommonly used. Acceptance of risk was common in recipients deemed higher risk for waitlist mortality and led to shorter wait times. Caution should be used in accepting combined risk transplants. The recipient risk factors have significant impact on outcomes across all donor risk groups and further analysis will help balance the waitlist mortality with post-transplant outcomes.
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Affiliation(s)
- Bibhuti Das
- Pediatric Cardiology, Texas Children's Hospital, Austin, TX, USA
| | - Jaimin R Trivedi
- Cardiovascular and Thoracic Surgery, University of Louisville, Louisville, KY, USA
| | - Pranava Sinha
- Department of Cardiovascular Surgery, Children's National Hospital, Washington, DC, USA
| | - Karthik Ramakrishnan
- Department of Cardiovascular Surgery, Children's National Hospital, Washington, DC, USA
| | - Bahaaldin Alsoufi
- Department of Cardiothoracic Surgery, University of Louisville School of Medicine, Norton Children's Hospital, Louisville, KY, USA
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22
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Bryant R, Wisotzkey B, Velez DA. The use of mechanical assist devices in the pediatric population. Semin Pediatr Surg 2021; 30:151041. [PMID: 33992308 DOI: 10.1016/j.sempedsurg.2021.151041] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
The last two decades have witnessed an expansion in the devices, support strategies, and outcomes for pediatric patients who require mechanical circulatory support. The use of large registries that house data on these devices and the development of shared learning networks have provided clinicians with the ability to critically assess outcomes for emerging and existing technology. The purpose of this review is to provide the reader with perspective on the most contemporary devices utilized for pediatric mechanical circulatory support. It will examine existing support strategies and the most contemporary outcomes regarding these devices including those in high risk patients.
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Affiliation(s)
- Roosevelt Bryant
- Division of Cardiovascular Surgery, The Heart Center, Phoenix Children's Hospital, Phoenix, AZ 85016
| | - Bethany Wisotzkey
- Division of Pediatric Cardiology, The Heart Center, Phoenix Children's Hospital, Phoenix, AZ 85016
| | - Daniel A Velez
- Division of Cardiovascular Surgery, The Heart Center, Phoenix Children's Hospital, Phoenix, AZ 85016
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23
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Song J. Where should we start to improve pediatric heart transplantation outcomes? Clin Exp Pediatr 2021; 64:76-77. [PMID: 33233875 PMCID: PMC7873391 DOI: 10.3345/cep.2020.00584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Accepted: 05/07/2020] [Indexed: 11/27/2022] Open
Affiliation(s)
- Jinyoung Song
- Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Korea
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24
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Rohde S, Antonides CFJ, Muslem R, van de Woestijne PC, van der Meulen MH, Kraemer US, Dalinghaus M, Bogers AJJC. Pediatric Ventricular Assist Device Support in the Netherlands. World J Pediatr Congenit Heart Surg 2020; 11:275-283. [PMID: 32294020 PMCID: PMC7163248 DOI: 10.1177/2150135120902114] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Accepted: 12/20/2019] [Indexed: 01/06/2023]
Abstract
BACKGROUND This study aimed to evaluate the changes in heart transplantation (HTx) waiting list mortality following the introduction of the Berlin Heart EXCOR (BH EXCOR) in the Netherlands, as well as the occurrence of adverse events in these children. METHODS A retrospective, single-center study was conducted including all pediatric patients (≤18 years) awaiting HTx. Patients were grouped in two eras based on availability of the BH EXCOR in our center, era I (1998-2006; not available) and era II (2007 to July 31, 2018; available). RESULTS In total, 87 patients were included, 15 in era I and 72 in era II. Extracorporeal membrane oxygenator support was required in 1 (7%) patient in era I and in 13 (18%) patients in era II. Overall mortality (7/15 in era I vs 16/72 in era II; 47% vs 22%, P = .06) and transplantation rates (8/15 in era I vs 47/72 in era II; 53% vs 65%, P = .39) did not differ significantly. Eleven (39%) patients of the pediatric ventricular assist device (VAD) population died, with the predominant cause being cerebrovascular accidents (CVAs) in eight (29%) patients. Furthermore, 14 (50%) of the pediatric VAD patients survived to transplantation. Adverse events most frequently occurring in VAD patients included CVA in 14 (50%), mostly (68%) within 30 days after VAD implantation, and bleeding requiring rethoracotomy in 14 (50%), all within 30 days after VAD implantation. CONCLUSIONS The introduction of the BH EXCOR has positively impacted the survival of pediatric patients with end-stage heart failure in our center. The predominant cause of death changed from end-stage heart failure in era I to CVA in era II. We emphasize the need for large prospective registry-based studies.
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Affiliation(s)
- Sofie Rohde
- Cardiothoracic Surgery, Erasmus University Medical Center, Rotterdam, the
Netherlands
| | | | - Rahatullah Muslem
- Cardiothoracic Surgery, Erasmus University Medical Center, Rotterdam, the
Netherlands
| | | | | | - Ulrike S. Kraemer
- Pediatric Cardiology, Erasmus University Medical Center, Rotterdam, the
Netherlands
- Pediatric Intensive Care Unit, Erasmus University Medical Center, Rotterdam,
the Netherlands
| | - Michiel Dalinghaus
- Pediatric Cardiology, Erasmus University Medical Center, Rotterdam, the
Netherlands
| | - Ad J. J. C. Bogers
- Cardiothoracic Surgery, Erasmus University Medical Center, Rotterdam, the
Netherlands
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25
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Denfield SW, Azeka E, Das B, Garcia-Guereta L, Irving C, Kemna M, Reinhardt Z, Thul J, Dipchand AI, Kirk R, Davies RR, Miera O. Pediatric cardiac waitlist mortality-Still too high. Pediatr Transplant 2020; 24:e13671. [PMID: 32198830 DOI: 10.1111/petr.13671] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 01/18/2020] [Accepted: 01/21/2020] [Indexed: 12/28/2022]
Abstract
Cardiac transplantation for children with end-stage cardiac disease with no other medical or surgical options is now standard. The number of children in need of cardiac transplant continues to exceed the number of donors considered "acceptable." Therefore, there is an urgent need to understand which recipients are in greatest need of transplant before becoming "too ill" and which "marginal" donors are acceptable in order to reduce waitlist mortality. This article reviewed primarily pediatric studies reported over the last 15 years on waitlist mortality around the world for the various subgroups of children awaiting heart transplant and discusses strategies to try to reduce the cardiac waitlist mortality.
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Affiliation(s)
- Susan W Denfield
- Division of Pediatric Cardiology, Texas Children's Hospital, Baylor College of Medicine, Houston, TX, USA
| | - Estela Azeka
- Division of Pediatric Cardiology, University of Sao Paolo, Sao Paolo, Brazil
| | - Bibhuti Das
- Texas Children's Hospital, Baylor College of Medicine, Austin, TX, USA
| | - Luis Garcia-Guereta
- Division of Pediatric Cardiology, Hospital Universitario La Paz, Madrid, Spain
| | - Claire Irving
- Division of Pediatric Cardiology, Children's Hospital Westmead, Sydney, NSW, Australia
| | - Mariska Kemna
- Division of Pediatric Cardiology, Seattle Children's Hospital, Seattle, WA, USA
| | - Zdenka Reinhardt
- Division of Pediatric Cardiology, Freeman Hospital, New Castle upon Tyne, UK
| | - Josef Thul
- Division of Pediatric Cardiology, Children's Heart Center, University of Giessen, Giessen, Germany
| | - Anne I Dipchand
- Labatt Family Heart Centre, Hospital for Sick Children, University of Toronto, Toronto, ON, Canada
| | - Richard Kirk
- Division of Pediatric Cardiology, Children's Medical Center, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Ryan R Davies
- Department of Cardiovascular and Thoracic Surgery, Children's Medical Center, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Oliver Miera
- Department of Congenital Heart Disease/Pediatric Cardiology, Deutsches Herzzentrum, Berlin, Germany
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26
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Shin JH, Park HK, Jung SY, Kim AY, Jung JW, Shin YR. The First Pediatric Heart Transplantation Bridged by a Durable Left Ventricular Assist Device in Korea. THE KOREAN JOURNAL OF THORACIC AND CARDIOVASCULAR SURGERY 2020; 53:79-81. [PMID: 32309207 PMCID: PMC7155184 DOI: 10.5090/kjtcs.2020.53.2.79] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Revised: 11/01/2019] [Accepted: 11/04/2019] [Indexed: 11/24/2022]
Abstract
Treatment options for children with end-stage heart failure are limited. We report the first case of a successful pediatric heart transplantation bridged with a durable left ventricular assist device in Korea. A 10-month-old female infant with dilated cardiomyopathy and left ventricular non-compaction was listed for heart transplantation. During the waiting period, the patient’s status deteriorated. Therefore, we decided to provide support with a durable left ventricular assist device as a bridge to transplantation. The patient was successfully bridged to heart transplantation with effective support and without any major adverse events.
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Affiliation(s)
- Jung Hoon Shin
- Division of Cardiovascular Surgery, Severance Cardiovascular Hospital, Yonsei University College of Medicine, Yonsei University Health System, Seoul, Korea
| | - Han Ki Park
- Division of Cardiovascular Surgery, Severance Cardiovascular Hospital, Yonsei University College of Medicine, Yonsei University Health System, Seoul, Korea
| | - Se Yong Jung
- Division of Pediatric Cardiology, Severance Cardiovascular Hospital, Yonsei University College of Medicine, Yonsei University Health System, Seoul, Korea
| | - Ah Young Kim
- Division of Pediatric Cardiology, Severance Cardiovascular Hospital, Yonsei University College of Medicine, Yonsei University Health System, Seoul, Korea
| | - Jo Won Jung
- Division of Pediatric Cardiology, Severance Cardiovascular Hospital, Yonsei University College of Medicine, Yonsei University Health System, Seoul, Korea
| | - Yu Rim Shin
- Division of Cardiovascular Surgery, Severance Cardiovascular Hospital, Yonsei University College of Medicine, Yonsei University Health System, Seoul, Korea
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27
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Shugh SB, Szugye NA, Zafar F, Riggs KW, Villa C, Lorts A, Morales DLS, Moore RA. Expanding the donor pool for congenital heart disease transplant candidates by implementing 3D imaging-derived total cardiac volumes. Pediatr Transplant 2020; 24:e13639. [PMID: 31880070 DOI: 10.1111/petr.13639] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Revised: 10/31/2019] [Accepted: 11/26/2019] [Indexed: 11/29/2022]
Abstract
BACKGROUND Heart transplant waitlist mortality remains high in infants <1 year of age and among those with CHD. Currently, the median accepted donor-to-recipient weight percentage is approximately 130% of the recipient's weight. We hypothesized that patients with CHD may accept a larger organ using novel 3D-derived imaging data to estimate donor and recipient TCV. METHODS A single-center, retrospective study was performed using CT data for 13 patients with CHD and 94 control patients. 3D visualization software was used to create digital 3D heart models that provide an estimate of TCV. In addition, echocardiograms obtained prior to cross-sectional imaging were reviewed for presence of ventricular chamber dilation. RESULTS Sixty-two percent (8/13) of patients with CHD had 3D-derived TCV resulting in a weight that was >130% larger than their actual weight. This was seen in single-ventricle patients following Blalock-Taussig shunt and Fontan palliation, and patients with biventricular repair. Of those, 75% (6/8) had reported moderate-to-severe ventricular chamber dilation by echocardiogram or cardiac magnetic resonance imaging. CONCLUSIONS In a large portion of patients with CHD, 3D-derived TCV place the recipient at a higher listing weight than their actual weight. We propose obtaining cross-sectional imaging to better assess TCV in a recipient, which may increase the donor range for CHD recipients and improve organ utilization in pediatrics.
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Affiliation(s)
- Svetlana B Shugh
- The Heart Institute, Joe DiMaggio Children's Hospital, Hollywood, FL
| | - Nicholas A Szugye
- The Heart Institute, Cincinnati Children's Hospital Medical Center, Cincinnati, OH
| | - Farhan Zafar
- The Heart Institute, Cincinnati Children's Hospital Medical Center, Cincinnati, OH
| | - Kyle W Riggs
- The Heart Institute, Cincinnati Children's Hospital Medical Center, Cincinnati, OH
| | - Chet Villa
- The Heart Institute, Cincinnati Children's Hospital Medical Center, Cincinnati, OH
| | - Angela Lorts
- The Heart Institute, Cincinnati Children's Hospital Medical Center, Cincinnati, OH
| | - David L S Morales
- The Heart Institute, Cincinnati Children's Hospital Medical Center, Cincinnati, OH
| | - Ryan A Moore
- The Heart Institute, Cincinnati Children's Hospital Medical Center, Cincinnati, OH
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28
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Kirk R, Dipchand AI, Davies RR, Miera O, Chapman G, Conway J, Denfield S, Gossett JG, Johnson J, McCulloch M, Schweiger M, Zimpfer D, Ablonczy L, Adachi I, Albert D, Alexander P, Amdani S, Amodeo A, Azeka E, Ballweg J, Beasley G, Böhmer J, Butler A, Camino M, Castro J, Chen S, Chrisant M, Christen U, Danziger-Isakov L, Das B, Everitt M, Feingold B, Fenton M, Garcia-Guereta L, Godown J, Gupta D, Irving C, Joong A, Kemna M, Khulbey SK, Kindel S, Knecht K, Lal AK, Lin K, Lord K, Möller T, Nandi D, Niesse O, Peng DM, Pérez-Blanco A, Punnoose A, Reinhardt Z, Rosenthal D, Scales A, Scheel J, Shih R, Smith J, Smits J, Thul J, Weintraub R, Zangwill S, Zuckerman WA. ISHLT consensus statement on donor organ acceptability and management in pediatric heart transplantation. J Heart Lung Transplant 2020; 39:331-341. [PMID: 32088108 DOI: 10.1016/j.healun.2020.01.1345] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Accepted: 01/24/2020] [Indexed: 12/14/2022] Open
Abstract
The number of potential pediatric heart transplant recipients continues to exceed the number of donors, and consequently the waitlist mortality remains significant. Despite this, around 40% of all donated organs are not used and are discarded. This document (62 authors from 53 institutions in 17 countries) evaluates factors responsible for discarding donor hearts and makes recommendations regarding donor heart acceptance. The aim of this statement is to ensure that no usable donor heart is discarded, waitlist mortality is reduced, and post-transplant survival is not adversely impacted.
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Affiliation(s)
- Richard Kirk
- Division of Pediatric Cardiology, University of Texas Southwestern Medical Center, Children's Medical Center, Dallas, Texas.
| | - Anne I Dipchand
- Labatt Family Heart Centre, Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - Ryan R Davies
- Department of Cardiovascular and Thoracic Surgery, University of Texas Southwestern Medical Center, Children's Medical Center, Dallas, Texas
| | - Oliver Miera
- Department of Congenital Heart Disease/Pediatric Cardiology, Deutsches Herzzentrum Berlin, Berlin, Germany
| | | | - Jennifer Conway
- Department of Pediatrics, Division of Pediatric Cardiology, Stollery Children's Hospital, University of Alberta, Edmonton, Alberta, Canada
| | - Susan Denfield
- Texas Children's Hospital, Baylor College of Medicine, Houston, Texas
| | - Jeffrey G Gossett
- University of California Benioff Children's Hospitals, San Francisco, California
| | - Jonathan Johnson
- Division of Pediatric Cardiology, Mayo Clinic, Rochester, Minnesota
| | - Michael McCulloch
- University of Virginia Children's Hospital, Charlottesville, Virginia
| | - Martin Schweiger
- Division of Pediatric Cardiology, Pediatric Heart Center, University Children's Hospital Zurich, Zurich, Switzerland
| | - Daniel Zimpfer
- Department of Cardiac Surgery, Vienna and Pediatric Heart Center Vienna, Vienna, Austria
| | - László Ablonczy
- Pediatric Cardiac Center, Hungarian Institute of Cardiology, Budapest, Hungary
| | - Iki Adachi
- Texas Children's Hospital, Baylor College of Medicine, Houston, Texas
| | - Dimpna Albert
- King Faisal Specialist Hospital & Research Center, Riyadh, Saudi Arabia
| | - Peta Alexander
- Department of Cardiology, Boston Children's Hospital Department of Pediatrics, Harvard Medical School, Boston, Massachusetts
| | | | | | - Estela Azeka
- Heart Institute (InCor) University of São Paulo, São Paulo, Brazil
| | - Jean Ballweg
- Department of Pediatrics, Division of Pediatric Cardiology, Children's Hospital and Medical Center University of Nebraska Medical Center, Omaha, Nebraska
| | - Gary Beasley
- Le Bonheur Children's Hospital, Memphis, Tennessee
| | - Jens Böhmer
- Queen Silvia Children's Hospital, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Alison Butler
- Carnegie Mellon University, Pittsburgh, Pennsylvania
| | | | - Javier Castro
- Fundacion Cardiovascular de Colombia, Santander, Bucaramanga City, Colombia
| | | | - Maryanne Chrisant
- Heart Institute, Joe Dimaggio Children's Hospital, Hollywood, Florida
| | - Urs Christen
- Oslo University Hospital Rikshospitalet, Oslo, Norway
| | - Lara Danziger-Isakov
- Pediatric Infectious Diseases, Cincinnati Children's Hospital Medical Center & University of Cincinnati, Cincinnati, Ohio
| | - Bibhuti Das
- Heart Institute, Joe Dimaggio Children's Hospital, Hollywood, Florida
| | | | - Brian Feingold
- Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Matthew Fenton
- Great Ormond Street Hospital for Children Foundation Trust, London, United Kingdom
| | | | - Justin Godown
- Vanderbilt University Medical Center, Nashville, Tennessee
| | - Dipankar Gupta
- Congenital Heart Center, University of Florida, Gainesville, Florida
| | - Claire Irving
- Children's Hospital Westmead, Sydney, New South Wales, Australia
| | - Anna Joong
- Ann and Robert H. Lurie Children's Hospital, Chicago, Illinois
| | | | | | - Steven Kindel
- Children's Hospital of Wisconsin, Milwaukee, Wisconsin
| | | | | | - Kimberly Lin
- The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Karen Lord
- New England Organ Bank, Boston, Massachusetts
| | - Thomas Möller
- Oslo University Hospital Rikshospitalet, Oslo, Norway
| | - Deipanjan Nandi
- Nationwide Children's Hospital, The Ohio State University, Columbus, Ohio
| | - Oliver Niesse
- Division of Pediatric Cardiology, Pediatric Heart Center, University Children's Hospital Zurich, Zurich, Switzerland
| | | | | | - Ann Punnoose
- Children's Hospital of Wisconsin, Milwaukee, Wisconsin
| | | | | | - Angie Scales
- Pediatric and Neonatal Donation and Transplantation, Organ Donation and Transplantation, NHS Blood and Transplant, London, United Kingdom
| | - Janet Scheel
- Washington University School of Medicine, St. Louis, Missouri
| | - Renata Shih
- Congenital Heart Center, University of Florida, Gainesville, Florida
| | | | | | - Josef Thul
- Children's Heart Center, University of Giessen, Giessen, Germany
| | | | | | - Warren A Zuckerman
- Columbia University Medical Center, Morgan Stanley Children's Hospital of New York, New York, New York
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29
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Abstract
Heart transplantation is a standard treatment for selected paediatric patients with end-stage heart disease. With improvement in surgical techniques, organ procurement and preservation strategies, immunosuppressive drugs, and more sophisticated monitoring strategies, survival following transplantation has increased over time. However, rejection, infection, renal failure, post-transplant lymphoproliferative disease and post-transplant cardiac allograft vasculopathy still preclude long-term survival. Therefore, continued multidisciplinary scientific efforts are needed for future gains. This review focuses on the current status, outcomes and ongoing challenges including patient selection, indications and contraindications, national and international survivals, post-transplant complications and quality of life.
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30
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Abstract
PURPOSE OF REVIEW To provide an international perspective and current review of pediatric heart transplantation (PHTx). RECENT FINDINGS Waitlist survival and long-term outcomes in PHTx continue to improve. Strategies to maximize donor pool utilization include ABO incompatible listing for infants and expanded donor-to-recipient weight ranges. However, there is a high degree of practice variation internationally, from listing strategies and donor acceptance practices to chronic immunosuppression regimens, long-term graft surveillance, and consideration for retransplantation. SUMMARY Common indications for PHTx include end-stage congenital heart disease and cardiomyopathy. Current median graft survival among PHTx recipients ranges from 13 to 22 years. Common morbidities include infection, rejection, renal dysfunction, coronary allograft vasculopathy, and posttransplant lymphoproliferative disease. International registry data, collaborative initiatives to standardize management, and multicenter studies continue to improve knowledge and advancement of the field.
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31
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Gravino R, Limongelli G, Petraio A, Masarone D, Russo MG, Maiello C, Verrengia M, De Paulis D, Pacileo G. Berlin Heart EXCOR® pediatric ventricular assist device in a patient with Sotos syndrome: a case report. J Med Case Rep 2019; 13:286. [PMID: 31470900 PMCID: PMC6717362 DOI: 10.1186/s13256-019-2190-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Accepted: 07/04/2019] [Indexed: 12/02/2022] Open
Abstract
INTRODUCTION Berlin Heart EXCOR® pediatric ventricular assist device is a mechanical circulatory support device currently used in pediatric patients. Sotos syndrome is a well-described multiple anomaly syndrome characterized by overgrowth, distinctive craniofacial appearance, cardiac abnormalities, and variable learning disabilities. CASE PRESENTATION We describe a 7-year-old female Caucasian child with classic Sotos syndrome features subjected to implantation of Berlin Heart EXCOR® pediatric biventricular assist device mechanical support. A heart transplant was carried out after a support time of 459 days. After 5 years of follow-up, our patient is clinically stable and the performance of the transplanted heart is excellent. CONCLUSION This case confirms that Berlin Heart EXCOR® pediatric ventricular assist device can provide satisfactory and safe circulatory support for children with end-stage heart diseases, even in those with Sotos syndrome. The syndrome is not a contraindication to implantation, since the complications are the same as those observed in patients without the syndrome and the prognosis is not affected by the disease.
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Affiliation(s)
- Rita Gravino
- Department of Heart Failure Unit, Monaldi Hospital, via Leonardo Bianchi, 80131 Naples, Italy
| | - Giuseppe Limongelli
- Department of Pediatric Cardiology Unit, Second University of Naples, Monaldi Hospital, Naples, Italy
| | - Andrea Petraio
- Department of Cardiac Transplant Unit, Monaldi Hospital, Naples, Italy
| | - Daniele Masarone
- Department of Heart Failure Unit, Monaldi Hospital, via Leonardo Bianchi, 80131 Naples, Italy
| | - Maria Giovanna Russo
- Department of Pediatric Cardiology Unit, Second University of Naples, Monaldi Hospital, Naples, Italy
| | - Ciro Maiello
- Department of Cardiac Transplant Unit, Monaldi Hospital, Naples, Italy
| | - Marina Verrengia
- Department of Heart Failure Unit, Monaldi Hospital, via Leonardo Bianchi, 80131 Naples, Italy
| | - Danilo De Paulis
- Department of Neurosurgery, San Anna & San Sebastiano City Hospital Caserta, Caserta, Italy
| | - Giuseppe Pacileo
- Department of Heart Failure Unit, Monaldi Hospital, via Leonardo Bianchi, 80131 Naples, Italy
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32
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Rohde S, Antonides CFJ, Dalinghaus M, Muslem R, Bogers AJJC. Clinical outcomes of paediatric patients supported by the Berlin Heart EXCOR: a systematic review. Eur J Cardiothorac Surg 2019; 56:830-839. [DOI: 10.1093/ejcts/ezz092] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Revised: 02/21/2019] [Accepted: 02/23/2019] [Indexed: 01/13/2023] Open
Abstract
Summary
Ventricular assist devices (VADs) are widely accepted as therapy to bridge children to heart transplantation. We provide a systematic review of the current state of clinical outcomes in children after paediatric VAD support by the Berlin Heart EXCOR (BH EXCOR) device. A systematic literature search was performed in April 2018. Studies reporting clinical outcomes in at least 15 children supported by a BH EXCOR VAD were included. Additionally, we focused on outcomes in small children and compared outcomes of children supported by a left ventricular assist device (LVAD) versus children supported by a biventricular assist device (BiVAD). Eighteen publications fulfilled the inclusion criteria and were included in this systematic review. Mortality rates ranged from 6.3% [confidence interval (CI) 0.0–18.1%] to 38.9% (2.8–75.0%) while transplantation rates ranged from 37.0% (CI 18.8–55.2%) to 72.5% (CI 63.9–81.2%) and successful weaning rates from 0.0% to 20.7% (CI 6.0–35.5%). In children under 1 year of age, mortality rates ranged from 20.0% to 55.5% and transplantation rates ranged from 0.0% to 62.5%. BiVAD support seemed to result in worse clinical outcomes than LVAD support. Incidence of stroke ranged from 5.0% to 47.0% in all children supported with the BH EXCOR. Although a high incidence of adverse events such as stroke and pump thrombosis is reported, VAD support should be considered in children with end-stage heart failure awaiting heart transplantation. Further research is warranted, especially on optimal timing of device implantation and anticoagulation regimens.
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Affiliation(s)
- Sofie Rohde
- Department of Cardiothoracic Surgery, Erasmus University Medical Centre, Rotterdam, Netherlands
| | | | - Michiel Dalinghaus
- Department of Paediatric Cardiology, Erasmus University Medical Centre, Rotterdam, Netherlands
| | - Rahatullah Muslem
- Department of Cardiothoracic Surgery, Erasmus University Medical Centre, Rotterdam, Netherlands
| | - Ad J J C Bogers
- Department of Cardiothoracic Surgery, Erasmus University Medical Centre, Rotterdam, Netherlands
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33
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iPhone in the Management of the Berlin Heart EXCOR Ventricular Assist Device. ASAIO J 2019; 64:278-279. [PMID: 29189424 DOI: 10.1097/mat.0000000000000708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Berlin Heart Inc. EXCOR is an extracorporeal pneumatically pulsatile ventricular assist device approved for use in pediatric age group since 2011 in the United States. It is a well-established life-saving therapy for the bridge to heart transplant or to provide circulatory support in a transplanted patient. The most commonly reported problem was "membrane defect" in a postmarketing major device reporting. In general, the filling and emptying of the pump can be easily visualized, but the interobserver variability exist. In this first novel report, we used the iPhone slow motion video to quantify and compare the differences in filling and emptying that positively impacted the management of the Berlin Heart. This is an initial exploratory concept that will need further studies to validate this bedside tool.
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34
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Listing Low-Weight or Ill Infants for Heart Transplantation: Is It Prudent? Ann Thorac Surg 2018; 106:1189-1196. [DOI: 10.1016/j.athoracsur.2018.06.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Revised: 05/15/2018] [Accepted: 06/04/2018] [Indexed: 11/19/2022]
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35
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Morrison AK, Gowda C, Tumin D, Phelps CM, Hayes D, Tobias J, Gajarski RJ, Nandi D. Pediatric marginal donor hearts: Trends in US national use, 2005-2014. Pediatr Transplant 2018; 22:e13216. [PMID: 29774622 DOI: 10.1111/petr.13216] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 03/23/2018] [Indexed: 11/28/2022]
Abstract
Pediatric patients awaiting heart transplant face high mortality rates due to donor organ shortages, including non-use of marginal donor hearts. We examined national trends in pediatric marginal donor heart use over time. UNOS data were queried for heart donors <18 years from 2005 to 2014. The proportion of donor hearts considered marginal was determined using previously cited marginal characteristics: left ventricular ejection fraction (LVEF) <50%, use of ≥2 inotropes, cerebrovascular death, CDC high-risk status, and eGFR < 30 mL/min/1.73 m2 . Disposition of donor hearts was determined and stratified by marginal donor status. Of 6778 pediatric hearts offered from 2005 to 2014, 2373 (35.0%) were considered marginal. Non-use of marginal donor hearts was significantly higher than that of donor hearts without any marginal characteristics (59.5% vs 20.3%, P < .001). In particular, LVEF < 50% and donor inotropes were associated with high rates of organ non-use among pediatric donors. Yet, non-use of marginal donor organs decreased from 67% to 48% from 2005 to 2014 (P < .001). Although the proportion of pediatric donor hearts used for pediatric patients has increased, more than half of donor hearts are declined for use in pediatric recipients due, in part, to perceived marginal status.
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Affiliation(s)
- Adam K Morrison
- Division of Cardiology, Nationwide Children's Hospital, Columbus, OH, USA.,Department of Pediatrics, The Ohio State University College of Medicine, Columbus, OH, USA
| | - Charitha Gowda
- Department of Infectious Disease, Nationwide Children's Hospital, Columbus, OH, USA
| | - Dmitry Tumin
- Department of Pediatrics, The Ohio State University College of Medicine, Columbus, OH, USA.,Department of Anesthesiology & Pain Medicine, Nationwide Children's Hospital, Columbus, OH, USA
| | - Christina M Phelps
- Division of Cardiology, Nationwide Children's Hospital, Columbus, OH, USA.,Department of Pediatrics, The Ohio State University College of Medicine, Columbus, OH, USA
| | - Don Hayes
- Section of Pulmonary Medicine, Nationwide Children's Hospital, Columbus, OH, USA.,Department of Internal Medicine, The Ohio State University College of Medicine, Columbus, OH, USA
| | - Joseph Tobias
- Department of Pediatrics, The Ohio State University College of Medicine, Columbus, OH, USA.,Department of Anesthesiology & Pain Medicine, Nationwide Children's Hospital, Columbus, OH, USA.,Department of Anesthesiology, The Ohio State University College of Medicine, Columbus, OH, USA
| | - Robert J Gajarski
- Division of Cardiology, Nationwide Children's Hospital, Columbus, OH, USA.,Department of Pediatrics, The Ohio State University College of Medicine, Columbus, OH, USA
| | - Deipanjan Nandi
- Division of Cardiology, Nationwide Children's Hospital, Columbus, OH, USA.,Department of Pediatrics, The Ohio State University College of Medicine, Columbus, OH, USA
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36
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Chen CK, Manlhiot C, Mital S, Schwartz SM, Van Arsdell GS, Caldarone C, McCrindle BW, Dipchand AI. Prelisting predictions of early postoperative survival in infant heart transplantation using classification and regression tree analysis. Pediatr Transplant 2018; 22. [PMID: 29271030 DOI: 10.1111/petr.13105] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 11/29/2017] [Indexed: 11/27/2022]
Abstract
Infants listed for heart transplantation experience high waitlist and early post-transplant mortality, and thus, optimal allocation of scarce donor organs is required. Unfortunately, the creation and validation of multivariable regression models to identify risk factors and generate individual-level predictions are challenging. We sought to explore the use of data mining methods to generate a prediction model. CART analysis was used to create a model which, at the time of listing, would predict which infants listed for heart transplantation would survive at least 3 months post-transplantation. A total of 48 infants were included; 13 died while waiting, and six died within 3 months of heart transplant. CART analysis identified RRT, blood urea nitrogen, and hematocrit as terminal nodes with alanine transaminase as an intermediate node predicting death. No patients listed on RRT (n = 10) survived and only three of 12 (25%) patients listed on ECLS survived >3 months post-transplant. CART analysis overall accuracy was 83%, with sensitivity of 95% and specificity 76%. This study shows that CART analysis can be used to generate accurate prediction models in small patient populations. Model validation will be necessary before incorporation into decision-making algorithms used to determine transplant candidacy.
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Affiliation(s)
- Ching Kit Chen
- Cardiology Service, Department of Pediatric Subspecialties, KK Women's and Children's Hospital, Singapore City, Singapore
| | - Cedric Manlhiot
- Department of Pediatrics, Division of Cardiology, The Labatt Family Heart Centre, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada
| | - Seema Mital
- Department of Pediatrics, Division of Cardiology, The Labatt Family Heart Centre, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada
| | - Steven M Schwartz
- Department of Pediatrics, Division of Cardiology, The Labatt Family Heart Centre, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada
| | - Glen S Van Arsdell
- Division of Cardiovascular Surgery, The Labatt Family Heart Centre, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada
| | - Christopher Caldarone
- Division of Cardiovascular Surgery, The Labatt Family Heart Centre, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada
| | - Brian W McCrindle
- Department of Pediatrics, Division of Cardiology, The Labatt Family Heart Centre, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada
| | - Anne I Dipchand
- Department of Pediatrics, Division of Cardiology, The Labatt Family Heart Centre, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada
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Abstract
Neonatal heart transplantation was developed and established in the 1980's as a durable modality of therapy for complex-uncorrectable heart disease. Patients transplanted in the neonatal period have experienced unparalleled long-term survival, better than for any other form of solid-organ transplantation. However, the limited availability of neonatal and young infant donors has restricted the indications and applicability of heart transplantation among newborns in the current era. Indications for heart transplantation include congenital heart disease not amenable to other forms of surgical palliation, and cardiomyopathy, including some primary tumors. Use of ABO-incompatible transplants, and organs with prolonged cold ischemic time or marginal function have all been associated with good outcomes in infants. These extended strategies to increase the donor pool may also someday include donation after determination of circulatory death and the use of anencephalic donors. The operative techniques for donors and recipients of neonatal heart transplantation are unique and have been well-described. Immunosuppression protocols for neonates need not include induction and are largely steroid-free. Newborn and young infant transplant recipients have fewer episodes of rejection, less coronary allograft vasculopathy, less post-transplant lymphoproliferative disease and less renal dysfunction than their older counterparts. Long-term outcomes have been very encouraging in terms of graft survival, patient survival, and quality of life. Our review highlights the history, current indications, techniques and outcomes of heart transplantation in this immunologically-privileged subset of patients.
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Affiliation(s)
- Mohan John
- Department of Cardiovascular and Thoracic Surgery, Loma Linda University Children's Hospital, Loma Linda, California, USA
| | - Leonard L Bailey
- Department of Cardiovascular and Thoracic Surgery, Loma Linda University Children's Hospital, Loma Linda, California, USA
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Marrone C, Ferrero P, Uricchio N, Sebastiani R, Vittori C, Ciuffreda M, Terzi A, Galletti L. The unnatural history of failing univentricular hearts: outcomes up to 25 years after heart transplantation. Interact Cardiovasc Thorac Surg 2017; 25:892-897. [DOI: 10.1093/icvts/ivx352] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Accepted: 09/19/2017] [Indexed: 11/12/2022] Open
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Caimi A, Sturla F, Good B, Vidotto M, De Ponti R, Piatti F, Manning KB, Redaelli A. Toward the Virtual Benchmarking of Pneumatic Ventricular Assist Devices: Application of a Novel Fluid-Structure Interaction-Based Strategy to the Penn State 12 cc Device. J Biomech Eng 2017; 139:2630936. [PMID: 28586917 DOI: 10.1115/1.4036936] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Indexed: 11/08/2022]
Abstract
The pediatric use of pneumatic ventricular assist devices (VADs) as a bridge to heart transplant still suffers for short-term major complications such as bleeding and thromboembolism. Although numerical techniques are increasingly exploited to support the process of device optimization, an effective virtual benchmark is still lacking. Focusing on the 12 cc Penn State pneumatic VAD, we developed a novel fluid-structure interaction (FSI) model able to capture the device functioning, reproducing the mechanical interplay between the diaphragm, the blood chamber, and the pneumatic actuation. The FSI model included the diaphragm mechanical response from uniaxial tensile tests, realistic VAD pressure operative conditions from a dedicated mock loop system, and the behavior of VAD valves. Our FSI-based benchmark effectively captured the complexity of the diaphragm dynamics. During diastole, the initial slow diaphragm retraction in the air chamber was followed by a more rapid phase; asymmetries were noticed in the diaphragm configuration during its systolic inflation in the blood chamber. The FSI model also captured the major features of the device fluid dynamics. In particular, during diastole, a rotational wall washing pattern is promoted by the penetrating inlet jet with a low-velocity region located in the center of the device. Our numerical analysis of the 12 cc Penn State VAD points out the potential of the proposed FSI approach well resembling previous experimental evidences; if further tested and validated, it could be exploited as a virtual benchmark to deepen VAD-related complications and to support the ongoing optimization of pediatric devices.
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Affiliation(s)
- Alessandro Caimi
- Department of Electronics, Information and Bioengineering, Politecnico di Milano, Milano 20133, Italy e-mail:
| | - Francesco Sturla
- Department of Electronics, Information and Bioengineering, Politecnico di Milano, Milano 20133, Italy e-mail:
| | - Bryan Good
- Department of Biomedical Engineering, The Pennsylvania State University, State College, PA 16802 e-mail:
| | - Marco Vidotto
- Department of Electronics, Information and Bioengineering, Politecnico di Milano, Milano 20133, Italy e-mail:
| | - Rachele De Ponti
- Department of Electronics, Information and Bioengineering, Politecnico di Milano, Milano 20133, Italy e-mail:
| | - Filippo Piatti
- Department of Electronics, Information and Bioengineering, Politecnico di Milano, Milano 20133, Italy e-mail:
| | - Keefe B Manning
- Mem. ASME Department of Biomedical Engineering, The Pennsylvania State University, University Park, PA 16802 e-mail:
| | - Alberto Redaelli
- Mem. ASME Department of Electronics, Information and Bioengineering, Politecnico di Milano, Milano 20133, Italy e-mail:
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Good BC, Weiss WJ, Deutsch S, Manning KB. Asynchronous Pumping of a Pulsatile Ventricular Assist Device in a Pediatric Anastomosis Model. World J Pediatr Congenit Heart Surg 2017; 8:511-519. [PMID: 28696878 DOI: 10.1177/2150135117713697] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
BACKGROUND Both pulsatile and continuous flow ventricular assist devices are being developed for pediatric congenital heart defect patients. Pulsatile devices are often operated asynchronously with the heart in either an "automatic" or a fixed beat rate mode. However, most studies have only investigated synchronized ejection. METHODS A previously validated viscoelastic blood solver is used to investigate the parameters of pulsatility, power loss, and graft failure in a pediatric aortic anastomosis model. RESULTS Pulsatility was highest with synchronized flow and lowest at a 90° phase shift. Power loss decreased at 90° and 180° phase shifts but increased at a 270° phase shift. Similar regions of potential intimal hyperplasia and graft failure were seen in all cases but with phase-shifted ejection leading to higher wall shear stress on the anastomotic floor and oscillatory shear index on the anastomotic toe. CONCLUSION The ranges of pulsatility and hemodynamics that can result clinically using asynchronous pulsatile devices were investigated in a pediatric anastomosis model. These results, along with the different postoperative benefits of pump modulation, can be used to design an optimal weaning protocol.
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Affiliation(s)
- Bryan C Good
- 1 Department of Biomedical Engineering, Pennsylvania State University, University Park, PA, USA
| | - William J Weiss
- 1 Department of Biomedical Engineering, Pennsylvania State University, University Park, PA, USA.,2 Department of Surgery, Penn State Hershey Medical Center, Hershey, PA, USA
| | - Steven Deutsch
- 1 Department of Biomedical Engineering, Pennsylvania State University, University Park, PA, USA
| | - Keefe B Manning
- 1 Department of Biomedical Engineering, Pennsylvania State University, University Park, PA, USA.,2 Department of Surgery, Penn State Hershey Medical Center, Hershey, PA, USA
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Schweiger M, Stiasny B, Immer F, Bürki C, Schmiady M, Dave H, Cavigelli-Brunner A, Kretschmar O, Cannizzaro V, Hübler M. Cardiac transplantation in a neonate-First case in Switzerland and European overview. Clin Transplant 2017; 31. [DOI: 10.1111/ctr.12935] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/20/2017] [Indexed: 11/30/2022]
Affiliation(s)
- Martin Schweiger
- Division of Congenital Cardiovascular Surgery; University Children's Hospital Zurich; Zurich Switzerland
- Children's Research Centre; University Children's Hospital Zurich; Zurich Switzerland
| | - Brian Stiasny
- Children's Research Centre; University Children's Hospital Zurich; Zurich Switzerland
- Division of Pediatric Cardiology; University Children's Hospital Zurich; Zurich Switzerland
| | | | - Christoph Bürki
- Children's Research Centre; University Children's Hospital Zurich; Zurich Switzerland
- Department of Anesthesiology; University Children's Hospital Zurich; Zurich Switzerland
| | - Martin Schmiady
- Division of Congenital Cardiovascular Surgery; University Children's Hospital Zurich; Zurich Switzerland
- Children's Research Centre; University Children's Hospital Zurich; Zurich Switzerland
| | - Hitendu Dave
- Division of Congenital Cardiovascular Surgery; University Children's Hospital Zurich; Zurich Switzerland
- Children's Research Centre; University Children's Hospital Zurich; Zurich Switzerland
| | - Anna Cavigelli-Brunner
- Children's Research Centre; University Children's Hospital Zurich; Zurich Switzerland
- Division of Pediatric Cardiology; University Children's Hospital Zurich; Zurich Switzerland
| | - Oliver Kretschmar
- Children's Research Centre; University Children's Hospital Zurich; Zurich Switzerland
- Division of Pediatric Cardiology; University Children's Hospital Zurich; Zurich Switzerland
| | - Vincenzo Cannizzaro
- Children's Research Centre; University Children's Hospital Zurich; Zurich Switzerland
- Department of Intensive Care Medicine and Neonatology; University Children's Hospital Zurich; Zurich Switzerland
| | - Michael Hübler
- Division of Congenital Cardiovascular Surgery; University Children's Hospital Zurich; Zurich Switzerland
- Children's Research Centre; University Children's Hospital Zurich; Zurich Switzerland
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42
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Zakaria D, Frazier E, Imamura M, Garcia X, Pye S, Knecht KR, Prodhan P, Gossett JR, Swearingen CJ, Morrow WR. Improved Survival While Waiting and Risk Factors for Death in Pediatric Patients Listed for Cardiac Transplantation. Pediatr Cardiol 2017; 38:77-85. [PMID: 27803956 DOI: 10.1007/s00246-016-1486-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/24/2016] [Accepted: 10/18/2016] [Indexed: 11/29/2022]
Abstract
Our aim is to determine (a) the effect of changes in pre-transplant management and era of listing on survival of children listed for HTx and (b) risk factors for death while waiting. This retrospective study included all children listed between 1/1993 and 12/2009 at our center. Survival was determined using survival analysis and competing outcomes modeling. There were 254 listed patients of whom 144 (57%) had congenital heart disease, 208 (82%) were status 1, 52 used ECMO (20%), and 28 used ventricular assist device support (VAD) (11%) beginning in 2005. Overall mortality while waiting was 17% at 6 months, and 69% underwent transplant. Seven of 95 patients (7%) died waiting after 2004 compared to 36 of 159 (23%) before. ECMO and earlier year of listing were significant risk factors (p < 0.001) for wait-list mortality, whereas mortality was significantly lower (p = 0.002) after availability of VADs. Race, gender, blood type, and congenital diagnosis were not significant risk factors for death. Survival in pediatric patients listed for HTx has improved significantly in the current era at our institution. The availability of pediatric VADs has had a significant impact on survival while waiting in children listed for transplantation.
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Affiliation(s)
- Dala Zakaria
- Division of Pediatric Cardiology, College of Medicine, Arkansas Children's Hospital, University of Arkansas for Medical Sciences, 1 Children's Way, Slot 512-3, Little Rock, AR, USA.
| | - Elizabeth Frazier
- Division of Pediatric Cardiology, College of Medicine, Arkansas Children's Hospital, University of Arkansas for Medical Sciences, 1 Children's Way, Slot 512-3, Little Rock, AR, USA
| | - Michiaki Imamura
- Division of Pediatric Cardiothoracic Surgery, Arkansas Children's Hospital, University of Arkansas for the Medical Science, Little Rock, AR, USA
| | - Xiomara Garcia
- Division of Pediatric Cardiology, College of Medicine, Arkansas Children's Hospital, University of Arkansas for Medical Sciences, 1 Children's Way, Slot 512-3, Little Rock, AR, USA
| | - Sherry Pye
- Division of Pediatric Cardiology, College of Medicine, Arkansas Children's Hospital, University of Arkansas for Medical Sciences, 1 Children's Way, Slot 512-3, Little Rock, AR, USA
| | - Kenneth R Knecht
- Division of Pediatric Cardiology, College of Medicine, Arkansas Children's Hospital, University of Arkansas for Medical Sciences, 1 Children's Way, Slot 512-3, Little Rock, AR, USA
| | - Parthak Prodhan
- Division of Pediatric Cardiology, College of Medicine, Arkansas Children's Hospital, University of Arkansas for Medical Sciences, 1 Children's Way, Slot 512-3, Little Rock, AR, USA
| | - Jeffrey R Gossett
- Division of Pediatric Cardiology, College of Medicine, Arkansas Children's Hospital, University of Arkansas for Medical Sciences, 1 Children's Way, Slot 512-3, Little Rock, AR, USA
| | - Christopher J Swearingen
- Biostatistics Program, Arkansas Children's Hospital, University of Arkansas for the Medical Science, Little Rock, AR, USA
| | - W Robert Morrow
- Division of Pediatric Cardiology, Children's Medical Center, University of Texas Southwestern Medical Center, Dallas, TX, USA
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Khan AM, Green RS, Lytrivi ID, Sahulee R. Donor predictors of allograft utilization for pediatric heart transplantation. Transpl Int 2016; 29:1269-1275. [DOI: 10.1111/tri.12835] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2016] [Revised: 05/05/2016] [Accepted: 08/06/2016] [Indexed: 11/27/2022]
Affiliation(s)
- Asma M. Khan
- Division of Cardiology; Department of Pediatrics; Icahn School of Medicine at Mount Sinai; New York NY USA
| | - Robert S. Green
- Division of Newborn Medicine; Department of Pediatrics; Icahn School of Medicine at Mount Sinai; New York NY USA
| | - Irene D. Lytrivi
- Division of Cardiology; Department of Pediatrics; Icahn School of Medicine at Mount Sinai; New York NY USA
| | - Raj Sahulee
- Division of Cardiology; Department of Pediatrics; Icahn School of Medicine at Mount Sinai; New York NY USA
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Acute kidney injury after heart transplant in young children: risk factors and outcomes. Pediatr Nephrol 2016; 31:671-8. [PMID: 26559064 DOI: 10.1007/s00467-015-3252-x] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/14/2015] [Revised: 10/05/2015] [Accepted: 10/19/2015] [Indexed: 01/11/2023]
Abstract
BACKGROUND Critical illness following heart transplantation can include acute kidney injury (AKI). Study objectives were to define the epidemiology of, risk factors for, or impact on outcomes of AKI after pediatric heart transplant. METHODS Using data from a prospective study of 66 young children, we evaluated: (1) post-operative AKI rate (by pediatric modified RIFLE criteria); (2) pre, intra, and early post-operative AKI risk factors using stepwise logistic regression (3) effect of AKI on short-term outcomes (ventilation and length of pediatric intensive care unit (PICU) stay) using stepwise multiple regression. RESULTS AKI occurred in 73 % of children. Pre-transplant ventilation and higher baseline estimated creatinine clearance (eCCl) were independent risk factors for AKI. Pre-operative inotrope use was associated with reduced risk of AKI. Tacrolimus level emerged as important in multivariable risk prediction. Children with AKI had a longer duration of ventilation and length of pediatric intensive care unit (PICU) stay, with AKI being an independent predictor. CONCLUSIONS AKI was common after heart transplant and associated with more complicated early post-transplant course. Lower baseline eCCl was associated with lower incidence of AKI; this merits further investigation. The association of pre-operative inotropes with less AKI may reflect a pathophysiological mechanism or be a surrogate for clinical factors and management prior to transplant. Avoiding high tacrolimus levels may be a modifiable risk factor for AKI.
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Good BC, Deutsch S, Manning KB. Hemodynamics in a Pediatric Ascending Aorta Using a Viscoelastic Pediatric Blood Model. Ann Biomed Eng 2016; 44:1019-35. [PMID: 26159560 PMCID: PMC4707135 DOI: 10.1007/s10439-015-1370-z] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2014] [Accepted: 06/16/2015] [Indexed: 10/23/2022]
Abstract
Congenital heart disease is the leading cause of infant death in the United States with over 36,000 newborns affected each year. Despite this growing problem there are few mechanical circulatory support devices designed specifically for pediatric and neonate patients. Previous research has been done investigating pediatric ventricular assist devices (PVADs) assuming blood to be a Newtonian fluid in computational fluid dynamics (CFD) simulations, ignoring its viscoelastic and shear-thinning properties. In contrast to adult VADs, PVADs may be more susceptible to hemolysis and thrombosis due to altered flow into the aorta, and therefore, a more accurate blood model should be used. A CFD solver that incorporates a modified Oldroyd-B model designed specifically for pediatric blood is used to investigate important hemodynamic parameters in a pediatric aortic model under pulsatile flow conditions. These results are compared to Newtonian blood simulations at three physiological pediatric hematocrits. Minor differences are seen in both velocity and wall shear stress (WSS) during early stages of the cardiac cycle between the Newtonian and viscoelastic models. During diastole, significant differences are seen in the velocities in the descending aorta (up to 12%) and in the aortic branches (up to 30%) between the two models. Additionally, peak WSS differences are seen between the models throughout the cardiac cycle. At the onset of diastole, peak WSS differences of 43% are seen between the Newtonian and viscoelastic model and between the 20 and 60% hematocrit viscoelastic models at peak systole of 41%.
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Affiliation(s)
- Bryan C Good
- Department of Biomedical Engineering, The Pennsylvania State University, 205 Hallowell Building, University Park, PA, 16802, USA
| | - Steven Deutsch
- Department of Biomedical Engineering, The Pennsylvania State University, 205 Hallowell Building, University Park, PA, 16802, USA
| | - Keefe B Manning
- Department of Biomedical Engineering, The Pennsylvania State University, 205 Hallowell Building, University Park, PA, 16802, USA.
- Department of Surgery, Penn State Hershey Medical Center, Hershey, PA, 17033, USA.
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46
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Good BC, Deutsch S, Manning KB. Continuous and Pulsatile Pediatric Ventricular Assist Device Hemodynamics with a Viscoelastic Blood Model. Cardiovasc Eng Technol 2016; 7:23-43. [PMID: 26643646 PMCID: PMC4767652 DOI: 10.1007/s13239-015-0252-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Accepted: 11/23/2015] [Indexed: 11/25/2022]
Abstract
To investigate the effects of pulsatile and continuous pediatric ventricular assist (PVAD) flow and pediatric blood viscoelasticity on hemodynamics in a pediatric aortic graft model. Hemodynamic parameters of pulsatility, along with velocity and wall shear stress (WSS), are analyzed and compared between Newtonian and viscoelastic blood models at a range of physiological pediatric hematocrits using computational fluid dynamics. Both pulsatile and continuous PVAD flow lead to a decrease in pulsatility (surplus hemodynamic energy, ergs/cm(3)) compared to healthy aortic flow but with continuous PVAD pulsatility up to 2.4 times lower than pulsatile PVAD pulsatility at each aortic outlet. Significant differences are also seen between the two flow modes in velocity and WSS. The higher velocity jet during systole with pulsatile flow leads to higher WSSs at the anastomotic toe and at the aortic branch bifurcations. The lower velocity but continuous flow jet leads to a much different flow field and higher WSSs into diastole. Under a range of physiological pediatric hematocrit (20-60%), both velocity and WSS can vary significantly with the higher hematocrit blood model generally leading to higher peak WSSs but also lower WSSs in regions of flow separation. The large decrease in pulsatility seen from continuous PVAD flow could lead to complications in pediatric vascular development while the high WSSs during peak systole from pulsatile PVAD flow could lead to blood damage. Both flow modes lead to similar regions prone to intimal hyperplasia resulting from low time-averaged WSS and high oscillatory shear index.
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Affiliation(s)
- Bryan C Good
- Department of Biomedical Engineering, The Pennsylvania State University, 205 Hallowell Building, University Park, PA, 16802, USA
| | - Steven Deutsch
- Department of Biomedical Engineering, The Pennsylvania State University, 205 Hallowell Building, University Park, PA, 16802, USA
| | - Keefe B Manning
- Department of Biomedical Engineering, The Pennsylvania State University, 205 Hallowell Building, University Park, PA, 16802, USA.
- Department of Surgery, Penn State Hershey Medical Center, Hershey, PA, 17033, USA.
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Wehman B, Stafford KA, Bittle GJ, Kon ZN, Evans CF, Rajagopal K, Pietris N, Kaushal S, Griffith BP. Modern Outcomes of Mechanical Circulatory Support as a Bridge to Pediatric Heart Transplantation. Ann Thorac Surg 2016; 101:2321-7. [PMID: 26912304 DOI: 10.1016/j.athoracsur.2015.12.003] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/11/2015] [Revised: 10/17/2015] [Accepted: 12/07/2015] [Indexed: 01/20/2023]
Abstract
BACKGROUND Pediatric patients awaiting orthotopic heart transplantation frequently require bridge to transplantation (BTT) with mechanical circulatory support. Posttransplant survival outcomes and predictors of mortality have not been thoroughly described in the modern era using a large-scale analysis. METHODS The United Network for Organ Sharing database was reviewed to identify pediatric heart transplant recipients from 2005 through 2012. Patients were stratified into three groups: extracorporeal membrane oxygenation (ECMO), ventricular assist device (VAD), and direct transplantation (DTXP). The primary outcome was posttransplant survival. RESULTS Two thousand seven hundred seventy-seven pediatric patients underwent orthotopic heart transplantation. There were 617 patients who required BTT with mechanical circulatory support (22.2%), of whom there were 428 VAD BTT (69.4%) and 189 ECMO BTT (30.6%). An increase in VAD use was observed during the study period (p < 0.0001). Compared with DTXP, patients in the ECMO BTT group had a lower median age (<1 versus 5 years; p < 0.0001) and were significantly smaller (8 versus 14 kg; p < 0.001), whereas patients in the VAD BTT group were older (8 versus 5 years; p = 0.0002) and larger (24 versus 14 kg; p < 0.001). Actuarial survival was greater in the DTXP group compared with ECMO BTT, but similar to VAD BTT at 30 days and 1, 3, and 5 years. However, this survival difference was lost after censoring the first 4 months after transplant. In multivariable analysis, when restricted to the first 4 months of survival, independent predictors for mortality were ECMO BTT, age, diagnosis, and functional status, whereas VAD BTT was not. CONCLUSIONS Pediatric patients with DTXP or VAD BTT have equivalent posttransplant survival. However, those requiring ECMO BTT have inferior early posttransplant survival compared with those receiving DTXP.
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Affiliation(s)
- Brody Wehman
- Division of Cardiac Surgery, Department of Surgery, University of Maryland School of Medicine, Baltimore, Maryland
| | - Kristen A Stafford
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland
| | - Gregory J Bittle
- Division of Cardiac Surgery, Department of Surgery, University of Maryland School of Medicine, Baltimore, Maryland
| | - Zachary N Kon
- Division of Cardiac Surgery, Department of Surgery, University of Maryland School of Medicine, Baltimore, Maryland
| | - Charles F Evans
- Division of Cardiac Surgery, Department of Surgery, University of Maryland School of Medicine, Baltimore, Maryland
| | - Keshava Rajagopal
- Division of Cardiac Surgery, Department of Surgery, University of Maryland School of Medicine, Baltimore, Maryland
| | - Nicholas Pietris
- Division of Pediatric Cardiology, Department of Pediatrics, University of Maryland School of Medicine, Baltimore, Maryland
| | - Sunjay Kaushal
- Division of Cardiac Surgery, Department of Surgery, University of Maryland School of Medicine, Baltimore, Maryland
| | - Bartley P Griffith
- Division of Cardiac Surgery, Department of Surgery, University of Maryland School of Medicine, Baltimore, Maryland.
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48
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Current challenges in pediatric heart transplantation for congenital heart disease. Curr Opin Organ Transplant 2016; 20:577-83. [PMID: 26348572 DOI: 10.1097/mot.0000000000000238] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
PURPOSE OF REVIEW Pediatric heart transplantation is an established therapy for end-stage cardiac disease without suitable medical or surgical options. However, transplantation for congenital heart disease carries an incremental risk that challenges the pediatric transplant team on multiple levels. RECENT FINDINGS With improved outcomes following palliative and corrective congenital cardiac surgery, cardiac transplantation has decreased in recent years as a primary therapy. Nevertheless, congenital heart disease remains the most common indication for cardiac transplantation during infancy. Primary transplantation in infancy is selectively recommended for severe systemic ventricular dysfunction, severe atrioventricular valve insufficiency, and occlusive coronary artery anomalies, particularly with single ventricle physiology. Wait-list mortality remains highest for infants with prior palliative surgery and patients with failing Fontan physiology, both of whom have limited options for effective mechanical circulatory support. The sensitized patient carries an increased risk with prolonged wait times, although virtual cross-matches and single bead assays for donor-specific antigens have facilitated the transplant process. Early and late survival after transplantation for congenital heart disease remain inferior to cardiomyopathy, with prior Fontan procedure as a major risk factor. However, among survivors at 6 months, late outcomes are generally excellent. Major late causes of death include allograft vasculopathy, post-transplant lymphoproliferative disease, and acute rejection. Noncompliance with medications remains a major risk for teenage mortality. SUMMARY Despite the myriad of evolving challenges, pediatric heart transplantation for congenital heart disease enjoys routine short and long-term success at experienced centers for the vast majority of such patients without other options.
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49
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ABO-incompatible cardiac transplantation in pediatric patients with high isohemagglutinin titers. J Heart Lung Transplant 2015; 34:1095-102. [DOI: 10.1016/j.healun.2015.03.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2014] [Revised: 03/10/2015] [Accepted: 03/16/2015] [Indexed: 11/21/2022] Open
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50
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Liu Y, Sanchez PG, Wei X, Watkins AC, Niu S, Wu ZJ, Griffith BP. Effects of Cardiopulmonary Support With a Novel Pediatric Pump-Lung in a 30-Day Ovine Animal Model. Artif Organs 2015; 39:989-97. [PMID: 25921361 DOI: 10.1111/aor.12487] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The scarcity of donor organs has led to the development of devices that provide optimal long-term respiratory or cardiopulmonary support to bridge recipients as they wait for lung and/or heart transplantation. This study was designed to evaluate the 30-day in vivo performance of the newly developed pediatric pump-lung (PediPL) for cardiopulmonary support using a juvenile sheep model. The PediPL device was placed surgically between the right atrium and descending aorta in eight sheep (25.4-31.2 kg) and evaluated for 30 days. Anticoagulation was maintained with continuous heparin infusion (activated clotting time 150-200 s). The flow rate was measured continually, and gas transfer was measured daily. Plasma free hemoglobin, platelet activation, hematologic data, and blood biochemistry were assessed twice a week. Sheep were euthanized after 30 days. The explanted devices were examined for gross thrombosis. Six sheep survived for 30-32 days. During the study, the oxygen transfer rate of the devices was 54.9 ± 13.2 mL/min at a mean flow rate of 1.14 ± 0.46 L/min with blood oxygen saturation of 95.4% ± 1.7%. Plasma free hemoglobin was 8.2 ± 3.7 mg/dL. Platelet activation was 5.35 ± 2.65%. The animals had normal organ chemistries except for surgery-related transient alterations in kidney and liver function. Although we found some scattered thrombi on the membrane surfaces of some explanted devices during the necropsy, the device function and performance did not degrade. The PediPL device was capable of providing cardiopulmonary support with long-term reliability and good biocompatibility over the 30-day duration and offers the potential option for bridging pediatric patients with end-stage heart or lung disease to heart and/or lung transplantation.
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Affiliation(s)
- Yang Liu
- Department of Surgery, Artificial Organs Laboratory, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Pablo G Sanchez
- Department of Surgery, Artificial Organs Laboratory, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Xufeng Wei
- Department of Surgery, Artificial Organs Laboratory, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Amelia C Watkins
- Department of Surgery, Artificial Organs Laboratory, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Shuqiong Niu
- Department of Surgery, Artificial Organs Laboratory, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Zhongjun J Wu
- Department of Surgery, Artificial Organs Laboratory, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Bartley P Griffith
- Department of Surgery, Artificial Organs Laboratory, University of Maryland School of Medicine, Baltimore, MD, USA
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