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Tadros HJ, Turaga D, Zhao Y, Chang-Ru T, Adachi IA, Li X, Martin JF. Activated fibroblasts drive cellular interactions in end-stage pediatric hypertrophic cardiomyopathy. bioRxiv 2024:2024.01.25.577226. [PMID: 38352607 PMCID: PMC10862753 DOI: 10.1101/2024.01.25.577226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/20/2024]
Abstract
Hypertrophic cardiomyopathy (HCM) is a relatively rare but debilitating diagnosis in the pediatric population and patients with end-stage HCM require heart transplantation. In this study, we performed single-nucleus RNA sequencing on pediatric HCM and control myocardium. We identified distinct underling cellular processes in pediatric, end-stage HCM in cardiomyocytes, fibroblasts, endothelial cells, and myeloid cells, compared to controls. Pediatric HCM was enriched in cardiomyocytes exhibiting "stressed" myocardium gene signatures and underlying pathways associated with cardiac hypertrophy. Cardiac fibroblasts exhibited clear activation signatures and heightened downstream processes associated with fibrosis, more so than adult counterparts. There was notable depletion of tissue-resident macrophages, and increased vascular remodeling in endothelial cells. Our analysis provides the first single nuclei analysis focused on end-stage pediatric HCM.
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Affiliation(s)
- Hanna J Tadros
- Department of Pediatrics, Section of Pediatric Cardiology, Texas Children's Hospital, Baylor College of Medicine, Houston, TX, USA
| | - Diwakar Turaga
- Department of Pediatrics, Baylor College of Medicine, Houston, Texas, USA
- Division of Critical Care Medicine, Texas Children's Hospital, Houston TX, USA
| | - Yi Zhao
- The Texas Heart Institute, Houston, TX, USA
| | - Tsai Chang-Ru
- Department of Integrative Physiology, Baylor College of Medicine, Houston, TX, USA
| | - Iki A Adachi
- Department of Surgery, Baylor College of Medicine, Houston, Texas, USA
- Division of Congenital Heart Surgery, Texas Children's Hospital, Houston, TX, USA
| | - Xiao Li
- The Texas Heart Institute, Houston, TX, USA
| | - James F Martin
- The Texas Heart Institute, Houston, TX, USA
- Department of Integrative Physiology, Baylor College of Medicine, Houston, TX, USA
- Center for Organ Repair and Renewal, Baylor College of Medicine, Houston, TX, USA
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Yang Q, Tadros HJ, Sun B, Bidzimou MT, Ezekian JE, Li F, Ludwig A, Wehrens XH, Landstrom AP. Junctional Ectopic Tachycardia Caused by Junctophilin-2 Expression Silencing Is Selectively Sensitive to Ryanodine Receptor Blockade. JACC Basic Transl Sci 2023; 8:1577-1588. [PMID: 38205351 PMCID: PMC10774596 DOI: 10.1016/j.jacbts.2023.07.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Revised: 07/10/2023] [Accepted: 07/10/2023] [Indexed: 01/12/2024]
Abstract
Junctional ectopic tachycardia (JET) is a potentially fatal cardiac arrhythmia. Hcn4:shJph2 mice serve as a model of nodal arrhythmias driven by ryanodine type 2 receptor (RyR2)-mediated Ca2+ leak. EL20 is a small molecule that blocks RyR2 Ca2+ leak. In a novel in vivo model of JET, Hcn4:shJph2 mice demonstrated rapid conversion of JET to sinus rhythm with infusion of EL20. Primary atrioventricular nodal cells demonstrated increased Ca2+ transient oscillation frequency and increased RyR2-mediated stored Ca2+ leak which was normalized by EL20. EL20 was found to be rapidly degraded in mouse and human plasma, making it a potential novel therapy for JET.
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Affiliation(s)
- Qixin Yang
- Division of Cardiology, Department of Pediatrics, Duke University School of Medicine, Durham, North Carolina, USA
- Department of Cardiology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Hanna J. Tadros
- Section of Cardiology, Department of Pediatrics, Baylor College of Medicine, Houston, Texas, USA
| | - Bo Sun
- Division of Cardiology, Department of Pediatrics, Duke University School of Medicine, Durham, North Carolina, USA
| | - Minu-Tshyeto Bidzimou
- Division of Cardiology, Department of Pediatrics, Duke University School of Medicine, Durham, North Carolina, USA
| | - Jordan E. Ezekian
- Division of Cardiology, Department of Pediatrics, Duke University School of Medicine, Durham, North Carolina, USA
| | - Feng Li
- Center for Drug Discovery and Department of Pathology and Immunology, Baylor College of Medicine, Houston, Texas, USA
| | - Andreas Ludwig
- Institut für Experimentelle und Klinische Pharmakologie, und Toxikologie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Xander H.T. Wehrens
- Section of Cardiology, Department of Pediatrics, Baylor College of Medicine, Houston, Texas, USA
- Cardiovascular Research Institute, Departments of Medicine (Cardiology), Molecular Physiology and Biophysics, and Neuroscience and Center for Space Medicine, Baylor College of Medicine, Houston, Texas, USA
| | - Andrew P. Landstrom
- Division of Cardiology, Department of Pediatrics, Duke University School of Medicine, Durham, North Carolina, USA
- Department of Cell Biology, Duke University School of Medicine, Durham, North Carolina, USA
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Tadros HJ, Miyake CY, Kearney DL, Kim JJ, Denfield SW. The Many Faces of Arrhythmogenic Cardiomyopathy: An Overview. Appl Clin Genet 2023; 16:181-203. [PMID: 37933265 PMCID: PMC10625769 DOI: 10.2147/tacg.s383446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Accepted: 10/10/2023] [Indexed: 11/08/2023] Open
Abstract
Arrhythmogenic cardiomyopathy (AC) is a disease that involves electromechanical uncoupling of cardiomyocytes. This leads to characteristic histologic changes that ultimately lead to the arrhythmogenic clinical features of the disease. Initially thought to affect the right ventricle predominantly, more recent data show that it can affect both the ventricles or the left ventricle alone. Throughout the recent era, diagnostic modalities and criteria for AC have continued to evolve and our understanding of its clinical features in different age groups as well as the genotype to the phenotype correlations have improved. In this review, we set out to detail the epidemiology, etiologies, presentations, evaluation, and management of AC across the age continuum.
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Affiliation(s)
- Hanna J Tadros
- Department of Pediatrics, Section of Pediatric Cardiology, Texas Children’s Hospital, Baylor College of Medicine, Houston, TX, USA
| | - Christina Y Miyake
- Department of Pediatrics, Section of Pediatric Cardiology, Texas Children’s Hospital, Baylor College of Medicine, Houston, TX, USA
- Department of Molecular Physiology and Biophysics, Baylor College of Medicine, Houston, TX, USA
| | - Debra L Kearney
- Department of Pathology, Texas Children’s Hospital, Baylor College of Medicine, Houston, TX, USA
| | - Jeffrey J Kim
- Department of Pediatrics, Section of Pediatric Cardiology, Texas Children’s Hospital, Baylor College of Medicine, Houston, TX, USA
| | - Susan W Denfield
- Department of Pediatrics, Division of Pediatric Cardiology, Baylor College of Medicine, Houston, TX, USA
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Kurzlechner LM, Kishnani S, Chowdhury S, Atkins SL, Moya-Mendez ME, Parker LE, Rosamilia MB, Tadros HJ, Pace LA, Patel V, Chahal CAA, Landstrom AP. DiscoVari: A Web-Based Precision Medicine Tool for Predicting Variant Pathogenicity in Cardiomyopathy- and Channelopathy-Associated Genes. Circ Genom Precis Med 2023; 16:317-327. [PMID: 37409478 PMCID: PMC10527712 DOI: 10.1161/circgen.122.003911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Accepted: 05/30/2023] [Indexed: 07/07/2023]
Abstract
BACKGROUND With genetic testing advancements, the burden of incidentally identified cardiac disease-associated gene variants is rising. These variants may carry a risk of sudden cardiac death, highlighting the need for accurate diagnostic interpretation. We sought to identify pathogenic hotspots in sudden cardiac death-associated genes using amino acid-level signal-to-noise (S:N) analysis and develop a web-based precision medicine tool, DiscoVari, to improve variant evaluation. METHODS The minor allele frequency of putatively pathogenic variants was derived from cohort-based cardiomyopathy and channelopathy studies in the literature. We normalized disease-associated minor allele frequencies to rare variants in an ostensibly healthy population (Genome Aggregation Database) to calculate amino acid-level S:N. Amino acids with S:N above the gene-specific threshold were defined as hotspots. DiscoVari was built using JavaScript ES6 and using open-source JavaScript library ReactJS, web development framework Next.js, and JavaScript runtime NodeJS. We validated the ability of DiscoVari to identify pathogenic variants using variants from ClinVar and individuals clinically evaluated at the Duke University Hospitals with cardiac genetic testing. RESULTS We developed DiscoVari as an internet-based tool for S:N-based variant hotspots. Upon validation, a higher proportion of ClinVar likely pathogenic/pathogenic variants localized to DiscoVari hotspots (43.1%) than likely benign/benign variants (17.8%; P<0.0001). Further, 75.3% of ClinVar variants reclassified to likely pathogenic/pathogenic were in hotspots, compared with 41.3% of those reclassified as variants of uncertain significance (P<0.0001) and 23.4% of those reclassified as likely benign/benign (P<0.0001). Of the clinical cohort variants, 73.1% of likely pathogenic/pathogenic were in hotspots, compared with 0.0% of likely benign/benign (P<0.01). CONCLUSIONS DiscoVari reliably identifies disease-susceptible amino acid residues to evaluate variants by searching amino acid-specific S:N ratios.
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Affiliation(s)
| | - Sujata Kishnani
- Dept of Pediatrics, Division of Pediatric Cardiology, Durham, NC
| | - Shawon Chowdhury
- Dept of Pediatrics, Division of Pediatric Cardiology, Durham, NC
| | - Sage L. Atkins
- Dept of Pediatrics, Division of Pediatric Cardiology, Durham, NC
| | | | - Lauren E. Parker
- Dept of Pediatrics, Division of Pediatric Cardiology, Durham, NC
| | | | - Hanna J. Tadros
- Dept of Pediatrics, Section of Pediatric Cardiology, Baylor College of Medicine, Houston, TX
| | - Leslie A. Pace
- Dept of Pediatrics, Division of Pediatric Cardiology, Durham, NC
| | - Viraj Patel
- North West Thames Regional Genetics Service, St Mark’s Hospital, London, United Kingdom
| | - C. Anwar A. Chahal
- Center for Inherited Cardiovascular Diseases, WellSpan Health, Lancaster, PA
- Barts Heart Centre, St Bartholomew’s Hospital, Barts Health NHS Trust, London, United Kingdom
- Cardiac Electrophysiology, Cardiovascular Division, Hospital of the Univ of Pennsylvania, Philadelphia, PA
- Dept of Cardiovascular Medicine, Mayo Clinic, Rochester, MN
| | - Andrew P. Landstrom
- Dept of Pediatrics, Division of Pediatric Cardiology, Durham, NC
- Dept of Cell Biology, Duke Univ School of Medicine, Durham, NC
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Tadros HJ, Choudhry S, Kearney DL, Hope K, Yesso A, Miyake CY, Price J, Spinner J, Tunuguntla H, Puri K, Dreyer W, Denfield SW. Arrhythmogenic cardiomyopathy is under-recognized in end-stage pediatric heart failure: A 36-year single-center experience. Pediatr Transplant 2023; 27:e14442. [PMID: 36451335 DOI: 10.1111/petr.14442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/25/2022] [Revised: 10/27/2022] [Accepted: 11/09/2022] [Indexed: 12/04/2022]
Abstract
BACKGROUND Although ventricular failure is a late finding in adults with AC, we hypothesize that this is a presenting symptom in pediatric heart failure patients who undergo HT and that their ventricular arrhythmia burden could differentiate AC from other cardiomyopathies. METHODS We performed a single-center retrospective cohort study reviewing 457 consecutive pediatric (≤18 years) HT recipients at our institution. Explanted hearts were examined to establish the primary diagnosis, based on pathologic findings. Demographic and clinical variables were compared between AC versus non-HCM cardiomyopathy cases. RESULTS Forty-five percent (n = 205/457) had non-HCM cardiomyopathies as the underlying primary diagnosis. Ten cases (10/205 = 4.9%) were diagnosed with AC. All 10 had biventricular disease. In 8/10 patients (80%), AC diagnosis was unrecognized pre-HT. Compared with non-AC cardiomyopathies, the AC group was older at diagnosis (9.3 years vs. 4.3 years, p = .012) and transplant (11.1 years vs. 6.5 years, p = .010), had more ventricular arrhythmias (80.0% vs 32.8%, p = .003), and required more anti-arrhythmic use (80.0% vs 32.3%, p = .001). Genetic testing yielded causative pathogenic variants in all tested individuals (n = 5/5, 100%). CONCLUSION AC is often an unrecognized cardiomyopathy pretransplant in children who undergo HT. Pediatric non-HCM phenotypes with heart failure who have a significant ventricular arrhythmia burden should be investigated for AC.
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Affiliation(s)
- Hanna J Tadros
- Department of Pediatrics, Lille Frank Abercrombie Division of Pediatric Cardiology, Texas Children's Hospital, Baylor College of Medicine, Houston, Texas, USA
| | - Swati Choudhry
- Department of Pediatrics, Lille Frank Abercrombie Division of Pediatric Cardiology, Texas Children's Hospital, Baylor College of Medicine, Houston, Texas, USA
| | - Debra L Kearney
- Department of Pathology, Texas Children's Hospital, Baylor College of Medicine, Houston, Texas, USA
| | - Kyle Hope
- Department of Pediatrics, Lille Frank Abercrombie Division of Pediatric Cardiology, Texas Children's Hospital, Baylor College of Medicine, Houston, Texas, USA
| | - Abigail Yesso
- Department of Pediatrics, Lille Frank Abercrombie Division of Pediatric Cardiology, Texas Children's Hospital, Baylor College of Medicine, Houston, Texas, USA
| | - Christina Y Miyake
- Department of Pediatrics, Lille Frank Abercrombie Division of Pediatric Cardiology, Texas Children's Hospital, Baylor College of Medicine, Houston, Texas, USA.,Department of Molecular Physiology and Biophysics, Baylor College of Medicine, Houston, Texas, USA
| | - Jack Price
- Department of Pediatrics, Lille Frank Abercrombie Division of Pediatric Cardiology, Texas Children's Hospital, Baylor College of Medicine, Houston, Texas, USA
| | - Joseph Spinner
- Department of Pediatrics, Lille Frank Abercrombie Division of Pediatric Cardiology, Texas Children's Hospital, Baylor College of Medicine, Houston, Texas, USA
| | - Hari Tunuguntla
- Department of Pediatrics, Lille Frank Abercrombie Division of Pediatric Cardiology, Texas Children's Hospital, Baylor College of Medicine, Houston, Texas, USA
| | - Kriti Puri
- Department of Pediatrics, Lille Frank Abercrombie Division of Pediatric Cardiology, Texas Children's Hospital, Baylor College of Medicine, Houston, Texas, USA.,Department of Pediatrics, Division of Pediatric Critical Care Medicine, Texas Children's Hospital, Baylor College of Medicine, Houston, Texas, USA
| | - William Dreyer
- Department of Pediatrics, Lille Frank Abercrombie Division of Pediatric Cardiology, Texas Children's Hospital, Baylor College of Medicine, Houston, Texas, USA
| | - Susan W Denfield
- Department of Pediatrics, Lille Frank Abercrombie Division of Pediatric Cardiology, Texas Children's Hospital, Baylor College of Medicine, Houston, Texas, USA
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6
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Tadros HJ, Gupta D. "A Good Death": Role of Shared Decision Making and Palliative Care in Children with Cardiac Disease. Pediatr Cardiol 2023; 44:958-959. [PMID: 36773076 DOI: 10.1007/s00246-023-03124-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Accepted: 02/02/2023] [Indexed: 02/12/2023]
Affiliation(s)
- Hanna J Tadros
- Section of Cardiology, Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA
| | - Dipankar Gupta
- Congenital Heart Center, Department of Pediatrics, University of Florida College of Medicine, Gainesville, FL, USA.
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Tadros HJ, Saidi A, Rawlinson AR, Cattier C, Black EW, Rackley J, Breault L, Pietra BA, Fricker FJ, Gupta D. Assessment of parental decision making in congenital heart disease, cardiomyopathy and heart transplantation: an observational study analysing decisional characteristics and preferences. Arch Dis Child 2023:archdischild-2022-324373. [PMID: 36732035 DOI: 10.1136/archdischild-2022-324373] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Accepted: 01/19/2023] [Indexed: 02/04/2023]
Abstract
OBJECTIVE We explore shared decision making (DM) in guardians of children with heart disease by assessing the desired weight of influence on DM and factors that may alter the relative weight of parent or medical team influence. METHODS Guardians of patients <21 years and admitted >1 week in the paediatric cardiac intensive care unit (PCICU) were recruited. Twelve vignettes were designed including technical (antibiotic selection, intubation, peripherally inserted central catheter placement, ventricular assist device placement, heart transplant, organ rejection, heart rhythm abnormalities and resuscitation effort) and non-technical vignettes (cessation of life-sustaining therapies, depression treatment, obesity and palliative care referral). Participants responded to questions on DM characteristics and one question querying preference for relative weight of parent or medical team influence on DM. RESULTS Of 209 participants approached, 183 were included. Most responded with equal desire of medical team and parental influence on DM in all vignettes (range 41.0%-66.7%). Technical scenarios formed one cluster based on DM characteristics, compared with non-technical scenarios. Factors that increase the relative weight of parental influence on DM include desired input and involvement in big-picture goals (OR 0.274, CI [0.217 to 0.346]; OR 0.794, CI [0.640 to 0.986]). Factors that increase the relative weight of medical team influence on DM include perception of medical expertise needed (OR 1.949 [1.630 to 2.330]), urgency (OR 1.373 [1.138 to 1.658]), benefit (OR 1.415 [1.172 to 1.710]), number of PCICU admissions (OR 1.134 [1.024 to 1.256]) and private insurance (OR 1.921 [1.144 to 3.226]). CONCLUSION Although factors may alter the weight of influence on DM, most parents desire equal parental and medical team influence on DM.
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Affiliation(s)
- Hanna J Tadros
- Department of Pediatrics, University of Florida, Gainesville, Florida, USA.,Section of Cardiology, Department of Pediatrics, Baylor College of Medicine, Houston, Texas, USA
| | - Arwa Saidi
- Department of Pediatrics, University of Florida, Gainesville, Florida, USA.,Congenital Heart Center, University of Florida, Gainesville, Florida, USA
| | - Alana R Rawlinson
- Department of Clinical and Health Psychology, University of Florida, Gainesville, Florida, USA
| | - Celine Cattier
- Department of Palliative Care, University of Florida, Gainesville, Florida, USA
| | - Erik W Black
- Department of Pediatrics, University of Florida, Gainesville, Florida, USA
| | - Jennifer Rackley
- Congenital Heart Center, University of Florida, Gainesville, Florida, USA
| | - Leah Breault
- Congenital Heart Center, University of Florida, Gainesville, Florida, USA
| | - Biagio A Pietra
- Department of Pediatrics, University of Florida, Gainesville, Florida, USA.,Congenital Heart Center, University of Florida, Gainesville, Florida, USA
| | - Fredrick J Fricker
- Department of Pediatrics, University of Florida, Gainesville, Florida, USA.,Congenital Heart Center, University of Florida, Gainesville, Florida, USA
| | - Dipankar Gupta
- Department of Pediatrics, University of Florida, Gainesville, Florida, USA .,Congenital Heart Center, University of Florida, Gainesville, Florida, USA
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8
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Tadros HJ, Doan TT, Pednekar AS, Masand PM, Spinner JA, Schlingmann TR, Pignatelli R, Noel CV, Wilkinson JC. Left ventricular non-compaction in paediatrics: a novel semi-automated imaging technique bridging imaging findings and clinical outcomes. Eur Heart J Cardiovasc Imaging 2022; 24:598-606. [PMID: 36441164 DOI: 10.1093/ehjci/jeac226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Revised: 10/14/2022] [Accepted: 10/18/2022] [Indexed: 11/29/2022] Open
Abstract
Abstract
Aims
We set out to design a reliable, semi-automated, and quantitative imaging tool using cardiac magnetic resonance (CMR) imaging that captures LV trabeculations in relation to the morphologic endocardial and epicardial surface, or perimeter-derived ratios, and assess its diagnostic and prognostic utility.
Methods and results
We queried our institutional database between January 2008 and December 2018. Non-compacted (NC)-to-compacted (C) (NC/C) myocardium ratios were calculated and our tool was used to calculate fractal dimension (FD), total mass ratio (TMR), and composite surface ratios (SRcomp). NC/C, FD, TMR, and SRcomp were assessed in relation to LVNC diagnosis and outcomes. Univariate hazard ratios with cut-offs were performed using clinically significant variables to find ‘at-risk’ patients and imaging parameters were compared in ‘at-risk’ patients missed by Petersen Index (PI). Ninety-six patients were included. The average time to complete the semi-automated measurements was 3.90 min (SEM: 0.06). TMR, SRcomp, and NC/C were negatively correlated with LV ejection fraction (LVEF) and positively correlated with indexed LV end-systolic volumes (iLVESVs), with TMR showing the strongest correlation with LVEF (−0.287; P = 0.005) and SRcomp with iLVESV (0.260; P = 0.011). We found 29 ‘at-risk’ patients who were classified as non-LVNC by PI and hence, were missed. When compared with non-LVNC and ‘low-risk’ patients, only SRcomp differentiated between both groups (1.91 SEM 0.03 vs. 1.80 SEM 0.03; P = 0.019).
Conclusion
This method of semi-automatic calculation of SRcomp captured changes in at-risk patients missed by standard methods, was strongly correlated with LVEF and LV systolic volumes and may better capture outcome events.
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Affiliation(s)
- Hanna J Tadros
- Section of Cardiology, Department of Pediatrics, Baylor College of Medicine , 6651 Main St, Legacy Tower, E1920, 77030 Houston, TX , USA
| | - Tam T Doan
- Section of Cardiology, Department of Pediatrics, Baylor College of Medicine , 6651 Main St, Legacy Tower, E1920, 77030 Houston, TX , USA
| | - Amol S Pednekar
- Department of Radiology, Cincinnati Children’s Hospital Medical Center , Cincinnati, OH , USA
| | - Prakash M Masand
- Department of Radiology, Baylor College of Medicine , Houston, TX , USA
| | - Joseph A Spinner
- Section of Cardiology, Department of Pediatrics, Baylor College of Medicine , 6651 Main St, Legacy Tower, E1920, 77030 Houston, TX , USA
| | - Tobias R Schlingmann
- Section of Cardiology, Department of Pediatrics, Baylor College of Medicine , 6651 Main St, Legacy Tower, E1920, 77030 Houston, TX , USA
| | - Ricardo Pignatelli
- Section of Cardiology, Department of Pediatrics, Baylor College of Medicine , 6651 Main St, Legacy Tower, E1920, 77030 Houston, TX , USA
| | - Cory V Noel
- Pediatric Cardiology of Alaska, Seattle Children’s Hospital , Anchorage, AK , USA
| | - James C Wilkinson
- Section of Cardiology, Department of Pediatrics, Baylor College of Medicine , 6651 Main St, Legacy Tower, E1920, 77030 Houston, TX , USA
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Tadros HJ, Rawlinson AR, Gupta D. Lessons from the family unit in paediatric heart transplantation: can we do better? Arch Dis Child 2022; 107:1000-1001. [PMID: 34281956 DOI: 10.1136/archdischild-2021-322101] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Accepted: 07/05/2021] [Indexed: 11/04/2022]
Affiliation(s)
- Hanna J Tadros
- Department of Pediatrics, University of Florida, Gainesville, Florida, USA.,Congenital Heart Center, Department of Pediatrics, University of Florida, Gainesville, Florida, USA
| | - Alana R Rawlinson
- Department of Clinical and Health Psychology, University of Florida, Gainesville, Florida, USA
| | - Dipankar Gupta
- Department of Pediatrics, University of Florida, Gainesville, Florida, USA .,Congenital Heart Center, Department of Pediatrics, University of Florida, Gainesville, Florida, USA
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10
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Kurzlechner LM, Jones EG, Berkman AM, Tadros HJ, Rosenfeld JA, YANG YAPING, Tunuguntla H, Allen HD, Kim JJ, Landstrom AP. PO-629-01 LEVERAGING SIGNAL-TO-NOISE ANALYSIS TO EXPAND CLINICAL UTILITY OF PATHOGENICITY CRITERIA FOR INCIDENTAL VARIANTS IN HYPERTROPHIC CARDIOMYOPATHY-ASSOCIATED GENES. Heart Rhythm 2022. [DOI: 10.1016/j.hrthm.2022.03.886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Kurzlechner LM, Jones EG, Berkman AM, Tadros HJ, Rosenfeld JA, Yang Y, Tunuguntla H, Allen HD, Kim JJ, Landstrom AP. Signal-to-Noise Analysis Can Inform the Likelihood That Incidentally Identified Variants in Sarcomeric Genes Are Associated with Pediatric Cardiomyopathy. J Pers Med 2022; 12:733. [PMID: 35629155 PMCID: PMC9145017 DOI: 10.3390/jpm12050733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 04/06/2022] [Accepted: 04/20/2022] [Indexed: 02/01/2023] Open
Abstract
Background: Hypertrophic cardiomyopathy (HCM) is the most common heritable cardiomyopathy and can predispose individuals to sudden death. Most pediatric HCM patients host a known pathogenic variant in a sarcomeric gene. With the increase in exome sequencing (ES) in clinical settings, incidental variants in HCM-associated genes are being identified more frequently. Diagnostic interpretation of incidental variants is crucial to enhance clinical patient management. We sought to use amino acid-level signal-to-noise (S:N) analysis to establish pathogenic hotspots in sarcomeric HCM-associated genes as well as to refine the 2015 American College of Medical Genetics (ACMG) criteria to predict incidental variant pathogenicity. Methods and Results: Incidental variants in HCM genes (MYBPC3, MYH7, MYL2, MYL3, ACTC1, TPM1, TNNT2, TNNI3, and TNNC1) were obtained from a clinical ES referral database (Baylor Genetics) and compared to rare population variants (gnomAD) and variants from HCM literature cohort studies. A subset of the ES cohort was clinically evaluated at Texas Children’s Hospital. We compared the frequency of ES and HCM variants at specific amino acid locations in coding regions to rare variants (MAF < 0.0001) in gnomAD. S:N ratios were calculated at the gene- and amino acid-level to identify pathogenic hotspots. ES cohort variants were re-classified using ACMG criteria with S:N analysis as a correlate for PM1 criteria, which reduced the burden of variants of uncertain significance. In the clinical validation cohort, the majority of probands with cardiomyopathy or family history hosted likely pathogenic or pathogenic variants. Conclusions: Incidental variants in HCM-associated genes were common among clinical ES referrals, although the majority were not disease-associated. Leveraging amino acid-level S:N as a clinical tool may improve the diagnostic discriminatory ability of ACMG criteria by identifying pathogenic hotspots.
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Affiliation(s)
- Leonie M. Kurzlechner
- Division of Pediatric Cardiology, Department of Pediatrics, Duke University School of Medicine, Durham, NC 27710, USA; (L.M.K.); (A.M.B.)
| | - Edward G. Jones
- Section of Pediatric Cardiology, Department of Pediatrics, Baylor College of Medicine, Houston, TX 77030, USA; (E.G.J.); (H.J.T.); (H.T.); (H.D.A.); (J.J.K.)
| | - Amy M. Berkman
- Division of Pediatric Cardiology, Department of Pediatrics, Duke University School of Medicine, Durham, NC 27710, USA; (L.M.K.); (A.M.B.)
| | - Hanna J. Tadros
- Section of Pediatric Cardiology, Department of Pediatrics, Baylor College of Medicine, Houston, TX 77030, USA; (E.G.J.); (H.J.T.); (H.T.); (H.D.A.); (J.J.K.)
- Department of Pediatrics, University of Florida, Gainesville, FL 32611, USA
| | - Jill A. Rosenfeld
- Department of Molecular and Human Genetics, Baylor Genetics Laboratories, Baylor College of Medicine, Houston, TX 77030, USA; (J.A.R.); (Y.Y.)
| | - Yaping Yang
- Department of Molecular and Human Genetics, Baylor Genetics Laboratories, Baylor College of Medicine, Houston, TX 77030, USA; (J.A.R.); (Y.Y.)
| | - Hari Tunuguntla
- Section of Pediatric Cardiology, Department of Pediatrics, Baylor College of Medicine, Houston, TX 77030, USA; (E.G.J.); (H.J.T.); (H.T.); (H.D.A.); (J.J.K.)
| | - Hugh D. Allen
- Section of Pediatric Cardiology, Department of Pediatrics, Baylor College of Medicine, Houston, TX 77030, USA; (E.G.J.); (H.J.T.); (H.T.); (H.D.A.); (J.J.K.)
| | - Jeffrey J. Kim
- Section of Pediatric Cardiology, Department of Pediatrics, Baylor College of Medicine, Houston, TX 77030, USA; (E.G.J.); (H.J.T.); (H.T.); (H.D.A.); (J.J.K.)
| | - Andrew P. Landstrom
- Division of Pediatric Cardiology, Department of Pediatrics, Duke University School of Medicine, Durham, NC 27710, USA; (L.M.K.); (A.M.B.)
- Department of Cell Biology, Duke University School of Medicine, Durham, NC 27710, USA
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12
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Tadros HJ, Doan T, Masand P, Pednekar A, Spinner J, Schlingmann TR, Pignatelli R, Noel CV, Wilkinson J. NOVEL SEMI-AUTOMATED TOTAL MASS RATIO IS HELPFUL IN THE DIAGNOSIS OF LEFT VENTRICULAR NON-COMPACTION CARDIOMYOPATHY IN CHILDREN. J Am Coll Cardiol 2022. [DOI: 10.1016/s0735-1097(22)02356-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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13
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Reinoso TR, Landim-Vieira M, Shi Y, Johnston JR, Parvatiyar MS, Pinto JRD, Landstrom AP, Chase PB, Tadros HJ. Genetic Variants and Post-Translational Modifications of Cardiac Troponin C: Insights from the Public Databases. Biophys J 2021. [DOI: 10.1016/j.bpj.2020.11.2136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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14
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Tadros HJ, Rawlinson AR, Martin E, Pietra BA, Fricker FJ, Gupta D. Family functioning in pediatric heart transplantation: Variables associated with poor outcomes. Pediatr Transplant 2020; 24:e13883. [PMID: 33105055 DOI: 10.1111/petr.13883] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 09/04/2020] [Accepted: 09/24/2020] [Indexed: 11/30/2022]
Abstract
Family functioning is integral in a child's life and is linked to quality of life in health as well as disease. This has been scarcely studied in pediatric orthotopic heart transplantation (pOHT). In this study, we evaluate demographic and clinical factors associated with family functioning in this patient population. Pediatric post-transplant families were recruited in an outpatient setting (n = 71). The PedsQL Family Impact Module was administered, along with the Parent and Adolescent Medication Barriers Scales (PMBS; AMBS) and the McArthur socioeconomic scale. Associations between clinical and demographic variables and scaled scores were evaluated. In our sample, patients with congenital heart disease, developmental delay, and enteral feeding had lower total impact (P = .026; P = .011; P = .008) and parent self-reported HRQL scores (P = .018; P = .012; P = .005). Patients with developmental delay and enteral feeding also had lower family functioning summary scores (P = .025; P = .031). Higher parent educational status was associated with lower total impact scores (P = .043). Higher PMBS scores demonstrated negative correlation with total impact (P < .001), parent self-reported HRQL (P < .001), and family functioning summary scores (P = .003). Multiple linear regression analysis identified developmental delay, parental education, and PMBS as independent variables associated with family functioning. Our study highlights important factors impacting family functioning in pOHT. Developmental delay, higher parental education, and PMBS were associated with poorer family functioning. Our findings emphasize the need for a multi-disciplinary approach including serial psychological assessment and interventions in the management of pOHT patients in order to optimize family functioning.
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Affiliation(s)
- Hanna J Tadros
- Department of Pediatrics, University of Florida College of Medicine, Gainesville, FL, USA.,Congenital Heart Center, University of Florida College of Medicine, Gainesville, FL, USA
| | - Alana R Rawlinson
- Department of Clinical and Health Psychology, University of Florida, Gainesville, FL, USA
| | - Emily Martin
- Congenital Heart Center, University of Florida College of Medicine, Gainesville, FL, USA
| | - Biagio A Pietra
- Department of Pediatrics, University of Florida College of Medicine, Gainesville, FL, USA.,Congenital Heart Center, University of Florida College of Medicine, Gainesville, FL, USA
| | - Fredrick J Fricker
- Department of Pediatrics, University of Florida College of Medicine, Gainesville, FL, USA.,Congenital Heart Center, University of Florida College of Medicine, Gainesville, FL, USA
| | - Dipankar Gupta
- Department of Pediatrics, University of Florida College of Medicine, Gainesville, FL, USA.,Congenital Heart Center, University of Florida College of Medicine, Gainesville, FL, USA
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15
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Tadros HJ, Boggs R, Childress M, Chang PM. Case 3: An Unusual Rhythm in a 12-day-old Infant. Neoreviews 2020; 21:e622-e624. [PMID: 32873657 DOI: 10.1542/neo.21-9-e622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Affiliation(s)
- Hanna J Tadros
- Department of Pediatrics, University of Florida, Gainesville, FL
| | - Ryan Boggs
- Congenital Heart Center, University of Florida, Gainesville, FL
| | - Megan Childress
- Department of Pediatrics, University of Florida, Gainesville, FL
| | - Philip M Chang
- Congenital Heart Center, University of Florida, Gainesville, FL
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16
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Tadros HJ, Lopez-Colon D, Bleiweis MS, Fricker FJ, Pietra BA, Gupta D. Postoperative vasoactive inotropic score is predictive of outcomes in pediatric heart transplantation. Clin Transplant 2020; 34:e13986. [PMID: 32441792 DOI: 10.1111/ctr.13986] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Revised: 04/29/2020] [Accepted: 05/18/2020] [Indexed: 12/01/2022]
Abstract
Vasoactive inotrope score (VIS) is scarcely studied in pediatric orthotopic heart transplantation (pOHT). We conducted a retrospective review of pOHT (<21 years) recipients. Max VIS and mean VIS were calculated at 0-24 and 24-48 hours post-pOHT. Patients were divided into groups based on ISHLT guidelines: high (>10) and low (≤10). In our group (n = 104), patients with high max and mean VIS groups at 0-24 and 24-48 hours had longer bypass times (high: >130 minutes; low: <108 minutes; P < .05) and high max and mean VIS groups at 0-24 hours had longer ischemic times (high: >215 minutes; low: <192 minutes; P < .05). Patients with high max and mean VIS at 0-24 and 24-48 hours had longer hospital stay, ventilation, inotrope duration, more cardiac events, and acute kidney injury postoperatively (P < .05). High max VIS at 24-48 hours and high mean VIS at 24-48 hours had higher 3-year mortality (P = .04; P = .02). Multivariate analysis confirmed the association of VIS with short-term outcomes. However, VIS was not identified as an independent predictor of mortality. The ROC curve exhibits 10 as the ideal cutoff with area under the curve >0.8 for primary graft dysfunction (PGD).
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Affiliation(s)
- Hanna J Tadros
- Congenital Heart Center, Department of Pediatrics, University of Florida, Gainesville, FL, USA.,Department of Pediatrics, University of Florida, Gainesville, FL, USA
| | - Dalia Lopez-Colon
- Congenital Heart Center, Department of Pediatrics, University of Florida, Gainesville, FL, USA
| | - Mark S Bleiweis
- Congenital Heart Center, Department of Pediatrics, University of Florida, Gainesville, FL, USA
| | - Fredrick J Fricker
- Congenital Heart Center, Department of Pediatrics, University of Florida, Gainesville, FL, USA
| | - Biagio A Pietra
- Congenital Heart Center, Department of Pediatrics, University of Florida, Gainesville, FL, USA
| | - Dipankar Gupta
- Congenital Heart Center, Department of Pediatrics, University of Florida, Gainesville, FL, USA
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17
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Tadros HJ, Life CS, Garcia G, Pirozzi E, Jones EG, Datta S, Parvatiyar MS, Chase PB, Allen HD, Kim JJ, Pinto JR, Landstrom AP. Meta-analysis of cardiomyopathy-associated variants in troponin genes identifies loci and intragenic hot spots that are associated with worse clinical outcomes. J Mol Cell Cardiol 2020; 142:118-125. [PMID: 32278834 PMCID: PMC7275889 DOI: 10.1016/j.yjmcc.2020.04.005] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Revised: 04/01/2020] [Accepted: 04/05/2020] [Indexed: 12/13/2022]
Abstract
INTRODUCTION Troponin (TNN)-encoded cardiac troponins (Tn) are critical for sensing calcium and triggering myofilament contraction. TNN variants are associated with development of cardiomyopathy; however, recent advances in genetic analysis have identified rare population variants. It is unclear how certain variants are associated with disease while others are tolerated. OBJECTIVE To compare probands with TNNT2, TNNI3, and TNNC1 variants and utilize high-resolution variant comparison mapping of pathologic and rare population variants to identify loci associated with disease pathogenesis. METHODS Cardiomyopathy-associated TNN variants were identified in the literature and topology mapping conducted. Clinical features were compiled and compared. Rare population variants were obtained from the gnomAD database. Signal-to-noise (S:N) normalized pathologic variant frequency against population variant frequency. Abstract review of clinical phenotypes was applied to "significant" hot spots. RESULTS Probands were compiled (N = 70 studies, 224 probands) as were rare variants (N = 125,748 exomes; 15,708 genomes, MAF <0.001). TNNC1-positive probands demonstrated the youngest age of presentation (20.0 years; P = .016 vs TNNT2; P = .004 vs TNNI3) and the highest death, transplant, or ventricular fibrillation events (P = .093 vs TNNT2; P = .024 vs TNNI3; Kaplan Meir: P = .025). S:N analysis yielded hot spots of diagnostic significance within the tropomyosin-binding domains, α-helix 1, and the N-Terminus in TNNT2 with increased sudden cardiac death and ventricular fibrillation (P = .004). The inhibitory region and C-terminal region in TNNI3 exhibited increased restrictive cardiomyopathy (P =.008). HCM and RCM models tended to have increased calcium sensitivity and DCM decreased sensitivity (P < .001). DCM and HCM studies typically showed no differences in Hill coefficient which was decreased in RCM models (P < .001). CM models typically demonstrated no changes to Fmax (P = .239). CONCLUSION TNNC1-positive probands had younger ages of diagnosis and poorer clinical outcomes. Mapping of TNN variants identified locations in TNNT2 and TNNI3 associated with heightened pathogenicity, RCM diagnosis, and increased risk of sudden death.
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Affiliation(s)
- Hanna J Tadros
- Department of Pediatrics, Section of Cardiology, Baylor College of Medicine, Houston, TX, United States; Department of Pediatrics, University of Florida, Gainesville, FL, United States
| | - Chelsea S Life
- Department of Biomedical Sciences, Florida State University College of Medicine, Tallahassee, United States
| | - Gustavo Garcia
- Department of Biomedical Sciences, Florida State University College of Medicine, Tallahassee, United States
| | - Elisa Pirozzi
- Department of Pediatrics, Division of Cardiology, Duke University School of Medicine, Durham, NC, United States
| | - Edward G Jones
- Department of Pediatrics, Baylor College of Medicine, Houston, TX, United States
| | - Susmita Datta
- Department of Biostatistics, University of Florida, Gainesville, FL, United States
| | - Michelle S Parvatiyar
- Department of Nutrition, Food and Exercise Sciences, Florida State University, Tallahassee, FL, United States
| | - P Bryant Chase
- Department of Biological Science, Florida State University, Tallahassee, FL, United States
| | - Hugh D Allen
- Department of Pediatrics, Section of Cardiology, Baylor College of Medicine, Houston, TX, United States
| | - Jeffrey J Kim
- Department of Pediatrics, Section of Cardiology, Baylor College of Medicine, Houston, TX, United States
| | - Jose R Pinto
- Department of Biomedical Sciences, Florida State University College of Medicine, Tallahassee, United States
| | - Andrew P Landstrom
- Department of Pediatrics, Section of Cardiology, Baylor College of Medicine, Houston, TX, United States; Department of Pediatrics, Division of Cardiology, Duke University School of Medicine, Durham, NC, United States.
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Tadros HJ, Gupta D, Childress M, Beasley G, Rubrecht AE, Shenoy A, Philip J, Bleiweis MS, Machado DS. Sub-acute neonatal hemochromatosis in an infant with hypoplastic left heart syndrome on ventricular assist device awaiting transplantation. Pediatr Transplant 2019; 23:e13567. [PMID: 31407854 DOI: 10.1111/petr.13567] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Revised: 07/10/2019] [Accepted: 07/15/2019] [Indexed: 11/29/2022]
Abstract
Single-ventricle pediatric patients, amongst other children waiting for OHT, are a vulnerable population, especially if candidacy is established before any palliation. NH is a rare disease with poor prognosis in the post-natal period. We present a case of sub-acute NH diagnosed in an infant with HLHS who was listed for OHT while bridged with a pulsatile paracorporeal VAD, with an emphasis on the evolution of the condition throughout the patient's clinical course and the ultimate decision for compassionate deactivation of VAD.
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Affiliation(s)
- Hanna J Tadros
- Congenital Heart Center, Department of Pediatrics, University of Florida, Gainesville, FL, USA.,Department of Pediatrics, University of Florida, Gainesville, FL, USA
| | - Dipankar Gupta
- Congenital Heart Center, Department of Pediatrics, University of Florida, Gainesville, FL, USA
| | - Megan Childress
- Congenital Heart Center, Department of Pediatrics, University of Florida, Gainesville, FL, USA.,Department of Pediatrics, University of Florida, Gainesville, FL, USA
| | - Genie Beasley
- Department of Pediatric Gastroenterology, University of Florida, Gainesville, FL, USA
| | - Ashlie E Rubrecht
- Department of Pathology, Immunology, and Laboratory Medicine, University of Florida, College of Medicine, Gainesville, FL, USA
| | - Archana Shenoy
- Department of Pathology, Immunology, and Laboratory Medicine, University of Florida, College of Medicine, Gainesville, FL, USA
| | - Joseph Philip
- Congenital Heart Center, Department of Pediatrics, University of Florida, Gainesville, FL, USA
| | - Mark S Bleiweis
- Congenital Heart Center, Department of Pediatrics, University of Florida, Gainesville, FL, USA
| | - Desiree S Machado
- Congenital Heart Center, Department of Pediatrics, University of Florida, Gainesville, FL, USA
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Dailey-Schwartz AL, Tadros HJ, Azamian MS, Lalani SR, Morris SA, Allen HD, Kim JJ, Landstrom AP. Copy Number Variants of Undetermined Significance Are Not Associated with Worse Clinical Outcomes in Hypoplastic Left Heart Syndrome. J Pediatr 2018; 202:206-211.e2. [PMID: 30172441 PMCID: PMC6203622 DOI: 10.1016/j.jpeds.2018.07.022] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 06/18/2018] [Accepted: 07/05/2018] [Indexed: 12/11/2022]
Abstract
OBJECTIVE To determine the prevalence, spectrum, and prognostic significance of copy number variants of undetermined significance (cnVUS) seen on chromosomal microarray (CMA) in neonates with hypoplastic left heart syndrome (HLHS). STUDY DESIGN Neonates with HLHS who presented to Texas Children's Hospital between June 2008 and December 2016 were identified. CMA results were abstracted and compared against copy number variations (CNVs) in ostensibly healthy individuals gathered from the literature. Findings were classified as normal, consistent with a known genetic disorder, or cnVUS. Survival was then compared using Kaplan-Meier analysis. Secondary outcomes included tracheostomy, feeding tube at discharge, cardiac arrest, and extracorporeal membrane oxygenation (ECMO). RESULTS Our study cohort comprised 105 neonates with HLHS, including 70 (66.7%) with normal CMA results, 9 (8.6%) with findings consistent with a known genetic disorder, and 26 (24.7%) with a cnVUS. Six of the 26 (23.0%) neonates with a cnVUS had a variant that localized to a specific region of the genome seen in the healthy control population. One-year survival was 84.0% in patients with a cnVUS, 68.3% in those with normal CMA results, and 33.3% in those with a known genetic disorder (P = .003). There were no significant differences in secondary outcomes among the groups, although notably ECMO was used in 15.7% of patients with normal CMA and was not used in those with cnVUS and abnormal results (P = .038). CONCLUSIONS Among children with HLHS, cnVUSs detected on CMA are common. The cnVUSs do not localize to specific regions of the genome, and are not associated with worse outcomes compared with normal CMA results.
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Affiliation(s)
- Andrew L. Dailey-Schwartz
- Department of Pediatrics, Section of Cardiology, Baylor College of Medicine, Houston, Texas, United States
| | - Hanna J. Tadros
- Department of Pediatrics, Section of Cardiology, Baylor College of Medicine, Houston, Texas, United States
| | - Mahshid Sababi Azamian
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, United States
| | - Seema R. Lalani
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, United States
| | - Shaine A Morris
- Department of Pediatrics, Section of Cardiology, Baylor College of Medicine, Houston, Texas, United States
| | - Hugh D. Allen
- Department of Pediatrics, Section of Cardiology, Baylor College of Medicine, Houston, Texas, United States
| | - Jeffrey J. Kim
- Department of Pediatrics, Section of Cardiology, Baylor College of Medicine, Houston, Texas, United States
| | - Andrew P. Landstrom
- Department of Pediatrics, Section of Cardiology, Baylor College of Medicine, Houston, Texas, United States.,† Address for Correspondence:Andrew P. Landstrom, MD, PhD Texas Children’s Hospital 1102 Bates Avenue Feigin Center, Suite 430.09 Houston TX 77030, United States Phone: (832) 824-4122 Fax: (832) 825-0237
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