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Townsend M, Jeewa A, Khoury M, Cunningham C, George K, Conway J. Unique Aspects of Hypertrophic Cardiomyopathy in Children. Can J Cardiol 2024; 40:907-920. [PMID: 38244986 DOI: 10.1016/j.cjca.2024.01.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2023] [Revised: 01/03/2024] [Accepted: 01/14/2024] [Indexed: 01/22/2024] Open
Abstract
Hypertrophic cardiomyopathy (HCM) is a primary heart muscle disease characterized by left ventricular hypertrophy that can be asymptomatic or with presentations that vary from left ventricular outflow tract obstruction, heart failure from diastolic dysfunction, arrhythmias, and/or sudden cardiac death. Children younger than 1 year of age tend to have worse outcomes and often have HCM secondary to inborn errors of metabolism or syndromes such as RASopathies. For children who survive or are diagnosed after 1 year of age, HCM outcomes are often favourable and similar to those seen in adults. This is because of sudden cardiac death risk stratification and medical and surgical innovations. Genetic testing and timely cardiac screening are paving the way for disease-modifying treatment as gene-specific therapies are being developed.
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Affiliation(s)
- Madeleine Townsend
- Department of Cardiology, Cleveland Clinic Children's Hospital, Cleveland, Ohio, USA
| | - Aamir Jeewa
- Division of Cardiology, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Michael Khoury
- Division of Pediatric Cardiology, Stollery Children's Hospital, Edmonton, Alberta, Canada
| | | | - Kristen George
- Division of Cardiology, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Jennifer Conway
- Division of Pediatric Cardiology, Stollery Children's Hospital, Edmonton, Alberta, Canada.
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2
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Earle NJ, Winbo A, Crawford J, Wheeler M, Stiles R, Donoghue T, Stiles MK, Hayes I, Marcondes L, Martin A, Skinner JR. Genetic Testing Yield and Clinical Characteristics of Hypertrophic Cardiomyopathy in Understudied Ethnic Groups: Insights From a New Zealand National Registry. Circ Heart Fail 2024; 17:e010970. [PMID: 38456273 PMCID: PMC10942243 DOI: 10.1161/circheartfailure.123.010970] [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: 06/19/2023] [Accepted: 12/07/2023] [Indexed: 03/09/2024]
Abstract
BACKGROUND Aotearoa/New Zealand has a multiethnic population. Patients with hypertrophic cardiomyopathy (HCM) are enrolled in the national Cardiac Inherited Diseases Registry New Zealand. Here, we report the characteristics of Cardiac Inherited Diseases Registry New Zealand HCM probands with and without pathogenic or likely pathogenic (P/LP) genetic variants for HCM, and assess genetic testing yield and variant spectrum by self-identified ethnicity. METHODS Probands with HCM and enrolled in Cardiac Inherited Diseases Registry New Zealand who have undergone clinical genetic testing over a 17-year period were included. Clinical data, family history, and genetic test results were analyzed. RESULTS Of 336 probands, 121 (36%) were women, 220 (66%) were European ethnicity, 41 (12%) were Māori, 26 (8%) were Pacific people, and 49 (15%) were other ethnicities. Thirteen probands (4%) presented with sudden death and 19 (6%) with cardiac arrest. A total of 134 (40%) had a P/LP variant identified; most commonly in the MYBPC3 gene (60%) followed by the MYH7 gene (24%). A P/LP variant was identified in 27% of Māori or Pacific probands versus 43% European or other ethnicity probands (P=0.022); 16% of Māori or Pacific probands had a variant of uncertain significance identified, compared with 9% of European or other ethnicity probands (P=0.092). Women more often had a P/LP variant identified than men (48% versus 35%; P=0.032), and variant-positive probands were younger at clinical diagnosis than variant of uncertain significance/variant-negative probands (39±17 versus 50±17 years; P<0.001) and more likely to have experienced cardiac arrest or sudden death events over their lifetime (P=0.002). CONCLUSIONS Carriage of a P/LP variant in HCM probands is associated with presentation at younger age, and cardiac arrest or sudden death events. Māori or Pacific probands were less likely to have a P/LP variant identified than European or other ethnicity probands.
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Affiliation(s)
- Nikki J. Earle
- Departments of Medicine (N.J.E.), University of Auckland, New Zealand
- Greenlane Paediatric and Congenital Cardiac Services, Starship Children’s Hospital, Auckland, New Zealand (N.J.E., J.C., L.M.)
| | - Annika Winbo
- Physiology (A.W.), University of Auckland, New Zealand
| | - Jackie Crawford
- Greenlane Paediatric and Congenital Cardiac Services, Starship Children’s Hospital, Auckland, New Zealand (N.J.E., J.C., L.M.)
| | - Miriam Wheeler
- Department of Cardiology, Auckland City Hospital, New Zealand (M.W., A.M.)
| | - Rachael Stiles
- Department of Cardiology, Waikato Hospital, Hamilton, New Zealand (R.S., M.K.S.)
| | - Tom Donoghue
- Department of Cardiology, Wellington Hospital, New Zealand (T.D.)
| | - Martin K. Stiles
- Department of Cardiology, Waikato Hospital, Hamilton, New Zealand (R.S., M.K.S.)
| | - Ian Hayes
- Genetic Health Service New Zealand, Northern Hub, Auckland (I.H.)
| | - Luciana Marcondes
- Greenlane Paediatric and Congenital Cardiac Services, Starship Children’s Hospital, Auckland, New Zealand (N.J.E., J.C., L.M.)
| | - Andrew Martin
- Department of Cardiology, Auckland City Hospital, New Zealand (M.W., A.M.)
| | - Jonathan R. Skinner
- Heart Centre for Children, Children’s Hospital at Westmead, Sydney Children’s Hospital Network, NSW, Australia (J.R.S.)
- Department of Paediatric and Adolescent Medicine, University of Sydney, NSW, Australia (J.R.S.)
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Sun B, Rouzbehani OM, Kramer RJ, Ghosh R, Perelli RM, Atkins S, Fatahian AN, Davis K, Szulik MW, Goodman MA, Hathaway MA, Chi E, Word TA, Tunuguntla H, Denfield SW, Wehrens XHT, Whitehead KJ, Abdelnasser HY, Warren JS, Wu M, Franklin S, Boudina S, Landstrom AP. Nonsense Variant PRDM16-Q187X Causes Impaired Myocardial Development and TGF-β Signaling Resulting in Noncompaction Cardiomyopathy in Humans and Mice. Circ Heart Fail 2023; 16:e010351. [PMID: 38113297 PMCID: PMC10752244 DOI: 10.1161/circheartfailure.122.010351] [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: 11/17/2022] [Accepted: 09/29/2023] [Indexed: 12/21/2023]
Abstract
BACKGROUND PRDM16 plays a role in myocardial development through TGF-β (transforming growth factor-beta) signaling. Recent evidence suggests that loss of PRDM16 expression is associated with cardiomyopathy development in mice, although its role in human cardiomyopathy development is unclear. This study aims to determine the impact of PRDM16 loss-of-function variants on cardiomyopathy in humans. METHODS Individuals with PRDM16 variants were identified and consented. Induced pluripotent stem cell-derived cardiomyocytes were generated from a proband hosting a Q187X nonsense variant as an in vitro model and underwent proliferative and transcriptional analyses. CRISPR (clustered regularly interspaced short palindromic repeats)-mediated knock-in mouse model hosting the Prdm16Q187X allele was generated and subjected to ECG, histological, and transcriptional analysis. RESULTS We report 2 probands with loss-of-function PRDM16 variants and pediatric left ventricular noncompaction cardiomyopathy. One proband hosts a PRDM16-Q187X variant with left ventricular noncompaction cardiomyopathy and demonstrated infant-onset heart failure, which was selected for further study. Induced pluripotent stem cell-derived cardiomyocytes prepared from the PRDM16-Q187X proband demonstrated a statistically significant impairment in myocyte proliferation and increased apoptosis associated with transcriptional dysregulation of genes implicated in cardiac maturation, including TGF-β-associated transcripts. Homozygous Prdm16Q187X/Q187X mice demonstrated an underdeveloped compact myocardium and were embryonically lethal. Heterozygous Prdm16Q187X/WT mice demonstrated significantly smaller ventricular dimensions, heightened fibrosis, and age-dependent loss of TGF-β expression. Mechanistic studies were undertaken in H9c2 cardiomyoblasts to show that PRDM16 binds TGFB3 promoter and represses its transcription. CONCLUSIONS Novel loss-of-function PRDM16 variant impairs myocardial development resulting in noncompaction cardiomyopathy in humans and mice associated with altered TGF-β signaling.
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Affiliation(s)
- Bo Sun
- Department of Pediatrics, Division of Cardiology, Duke University School of Medicine, Durham, North Carolina, United States
| | - Omid M.T. Rouzbehani
- Department of Nutrition and Integrative Physiology, Program in Molecular Medicine, University of Utah, Salt Lake City, Utah, United States
| | - Ryan J. Kramer
- Department of Pediatrics, Division of Cardiology, Duke University School of Medicine, Durham, North Carolina, United States
| | - Rajeshwary Ghosh
- Department of Nutrition and Integrative Physiology, Program in Molecular Medicine, University of Utah, Salt Lake City, Utah, United States
| | - Robin M. Perelli
- Department of Cell Biology, Duke University School of Medicine, Durham, North Carolina, United States
| | - Sage Atkins
- Department of Pediatrics, Division of Cardiology, Duke University School of Medicine, Durham, North Carolina, United States
| | - Amir Nima Fatahian
- Department of Nutrition and Integrative Physiology, Program in Molecular Medicine, University of Utah, Salt Lake City, Utah, United States
| | - Kathryn Davis
- Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, Utah
| | - Marta W. Szulik
- Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, Utah
| | - Michael A. Goodman
- Department of Nutrition and Integrative Physiology, Program in Molecular Medicine, University of Utah, Salt Lake City, Utah, United States
| | - Marissa A. Hathaway
- Department of Nutrition and Integrative Physiology, Program in Molecular Medicine, University of Utah, Salt Lake City, Utah, United States
| | - Ellenor Chi
- Department of Nutrition and Integrative Physiology, Program in Molecular Medicine, University of Utah, Salt Lake City, Utah, United States
| | - Tarah A. Word
- Department of Molecular Physiology & Biophysics, Baylor College of Medicine, Houston, Texas, United States
| | - Hari Tunuguntla
- Departments of Medicine and Pediatrics, Section of Cardiology, Baylor College of Medicine, Houston, Texas, United States
| | - Susan W. Denfield
- Departments of Medicine and Pediatrics, Section of Cardiology, Baylor College of Medicine, Houston, Texas, United States
| | - Xander H. T. Wehrens
- Department of Molecular Physiology & Biophysics, Baylor College of Medicine, Houston, Texas, United States
- Departments of Medicine and Pediatrics, Section of Cardiology, Baylor College of Medicine, Houston, Texas, United States
- Departments of Neuroscience, Cardiovascular Research Institute, and Center for Space Medicine, Baylor College of Medicine, Houston, Texas, United States
| | - Kevin J. Whitehead
- Division Cardiovascular Medicine, Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City, Utah, United States
| | - Hala Y. Abdelnasser
- Department of Pharmacological and Pharmaceutical Sciences, The University of Houston College of Pharmacy, Houston, Texas, United States
| | - Junco S. Warren
- Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, Utah
- Division of Cardiovascular Medicine, University of Utah School of Medicine, Salt Lake City, Utah, United States
| | - Mingfu Wu
- Department of Pharmacological and Pharmaceutical Sciences, The University of Houston College of Pharmacy, Houston, Texas, United States
| | - Sarah Franklin
- Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, Utah
| | - Sihem Boudina
- Department of Nutrition and Integrative Physiology, Program in Molecular Medicine, University of Utah, Salt Lake City, Utah, United States
| | - Andrew P. Landstrom
- Department of Pediatrics, Division of Cardiology, Duke University School of Medicine, Durham, North Carolina, United States
- Department of Cell Biology, Duke University School of Medicine, Durham, North Carolina, United States
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Lorenzo M, Lynch A, Ashkanase J, Fazari L, George K, Arathoon K, Minn S, Nicolson D, Jeewa A, Jean-St-Michel E. Symptomatic presentation influences outcomes in pediatric restrictive cardiomyopathy. Front Pediatr 2023; 11:1264751. [PMID: 37928350 PMCID: PMC10620919 DOI: 10.3389/fped.2023.1264751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Accepted: 09/19/2023] [Indexed: 11/07/2023] Open
Abstract
Introduction Children with restrictive cardiomyopathy (RCM) traditionally have a poor prognosis, with most patients either dying or requiring heart transplantation within 2 years of diagnosis. The development of symptoms in RCM suggests advanced disease. However, as screening practices evolve and lead to diagnosis of early disease, identifying appropriate timing of transplant listing becomes increasingly important. In this context we compared outcomes of children with RCM presenting with clinical symptoms to those asymptomatic at initial presentation. Methods This retrospective cohort study included 25 patients with RCM presenting to a quaternary care center between 2001 and 2018. Times to transplantation, death, and a composite outcome of adverse cardiac events (CPR, cardioversion, inotropic support, mechanical ventilation, mechanical support, or heart transplant) were compared between those symptomatic and asymptomatic at presentation. Results At 2 years following diagnosis, patients asymptomatic at presentation had a significantly better transplant-free survival at 57% compared to 17% for symptomatic patients (p = 0.03). Those asymptomatic at diagnosis also had significantly improved cardiac event-free survival at 71% compared to symptomatic patients at 25% (p = 0.01). In multivariable analysis, cardiac symptoms at presentation remained an independent risk factor for heart-transplant or death [hazard ratio 5.17 (1.28-20.85), p = 0.02]. Conclusion Patients with RCM who are symptomatic at time of diagnosis have significantly worse transplant-free survival and cardiac event-free survival. Given current practice variability in timing of transplant listing, the presence of any cardiac symptoms is an important negative prognostic marker and should prompt urgent transplant listing.
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Affiliation(s)
- Melissa Lorenzo
- Department of Pediatrics, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada
| | - Aine Lynch
- Department of Pediatrics, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada
| | - Jenna Ashkanase
- Department of Pediatrics, McMaster Children's Hospital, McMaster University, Hamilton, ON, Canada
| | - Linda Fazari
- Department of Pediatrics, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada
| | - Kristen George
- Department of Pediatrics, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada
| | - Katelyn Arathoon
- Department of Pediatrics, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada
| | - Sunghoon Minn
- Department of Pediatrics, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada
| | - Dawn Nicolson
- Department of Pediatrics, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada
| | - Aamir Jeewa
- Department of Pediatrics, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada
| | - Emilie Jean-St-Michel
- Department of Pediatrics, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada
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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. CIRCULATION. GENOMIC AND PRECISION MEDICINE 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] [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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Janin A, Perouse de Montclos T, Nguyen K, Consolino E, Nadeau G, Rey G, Bouchot O, Blanchet P, Sabbagh Q, Cazeneuve C, El-Malti R, Morel E, Delinière A, Chevalier P, Millat G. Molecular Diagnosis of Primary Cardiomyopathy in 231 Unrelated Pediatric Cases by Panel-Based Next-Generation Sequencing: A Major Focus on Five Carriers of Biallelic TNNI3 Pathogenic Variants. Mol Diagn Ther 2022; 26:551-560. [PMID: 35838873 DOI: 10.1007/s40291-022-00604-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/14/2022] [Indexed: 11/28/2022]
Abstract
BACKGROUND AND OBJECTIVE Pediatric cardiomyopathies are clinically heterogeneous heart muscle disorders associated with significant morbidity and mortality for which substantial evidence for a genetic contribution was previously reported. We present a detailed molecular investigation of a cohort of 231 patients presenting with primary cardiomyopathy below the age of 18 years. METHODS Cases with pediatric cardiomyopathies were analyzed using a next-generation sequencing (NGS) workflow based on a virtual panel including 57 cardiomyopathy-related genes. RESULTS This molecular approach led to the identification of 69 cases (29.9% of the cohort) genotyped as a carrier of at least one pathogenic or likely pathogenic variant. Fourteen patients were carriers of two mutated alleles (homozygous or compound heterozygous) on the same cardiomyopathy-related gene, explaining the severe clinical disease with early-onset cardiomyopathy. Homozygous TNNI3 pathogenic variants were detected for five unrelated neonates (2.2% of the cohort), with four of them carrying the same truncating variant, i.e. p.Arg69Alafs*8. CONCLUSIONS Our study confirmed the importance of genetic testing in pediatric cardiomyopathies. Discovery of novel pathogenic variations is crucial for clinical management of affected families, as a positive genetic result might be used by a prospective parent for prenatal genetic testing or in the process of pre-implantation genetic diagnosis.
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Affiliation(s)
- Alexandre Janin
- Laboratoire de Cardiogénétique Moléculaire, Centre de Biologie et Pathologie Est, Hospices Civils de Lyon, 69677, Bron, Cedex, France.,Université de Lyon 1, Lyon, France
| | - Thomas Perouse de Montclos
- Unité médico-chirurgicale des cardiopathies congénitales, Hôpital Cardiologique Louis Pradel, Hospices Civils de Lyon, Bron, France
| | - Karine Nguyen
- Département de Génétique, APHM, Hôpital Timone Adultes, Marseille, France
| | - Emilie Consolino
- Département de Génétique, APHM, Hôpital Timone Adultes, Marseille, France
| | - Gwenael Nadeau
- Genetics Department, Metropole Savoie Hospital Center, Chambéry, France
| | - Gaelle Rey
- Genetics Department, Metropole Savoie Hospital Center, Chambéry, France
| | - Océane Bouchot
- Service de Cardiologie, Centre Hospitalier Annecy Genevois, Epagny Metz-Tessy, France
| | - Patricia Blanchet
- Département de Génétique Médicale, CHU de Montpellier, Montpellier, France
| | - Quentin Sabbagh
- Département de Génétique Médicale, CHU de Montpellier, Montpellier, France
| | - Cécile Cazeneuve
- Laboratoire de Cardiogénétique Moléculaire, Centre de Biologie et Pathologie Est, Hospices Civils de Lyon, 69677, Bron, Cedex, France.,Université de Lyon 1, Lyon, France
| | - Rajae El-Malti
- Laboratoire de Cardiogénétique Moléculaire, Centre de Biologie et Pathologie Est, Hospices Civils de Lyon, 69677, Bron, Cedex, France.,Université de Lyon 1, Lyon, France
| | - Elodie Morel
- Service de Rythmologie, Hôpital Cardiologique Louis Pradel, Hospices Civils de Lyon, Bron, France
| | - Antoine Delinière
- Service de Rythmologie, Hôpital Cardiologique Louis Pradel, Hospices Civils de Lyon, Bron, France
| | - Philippe Chevalier
- Service de Rythmologie, Hôpital Cardiologique Louis Pradel, Hospices Civils de Lyon, Bron, France
| | - Gilles Millat
- Laboratoire de Cardiogénétique Moléculaire, Centre de Biologie et Pathologie Est, Hospices Civils de Lyon, 69677, Bron, Cedex, France. .,Université de Lyon 1, Lyon, France.
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7
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Franciosi S, Abrams DJ, Ingles J, Sanatani S. Sudden Cardiac Arrest in the Paediatric Population. CJC PEDIATRIC AND CONGENITAL HEART DISEASE 2022; 1:45-59. [PMID: 37969243 PMCID: PMC10642157 DOI: 10.1016/j.cjcpc.2022.02.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Accepted: 02/03/2022] [Indexed: 11/17/2023]
Abstract
Sudden cardiac arrest in the young is a rare event with a range of potential causes including cardiomyopathies, ion channelopathies, and autonomic nervous system dysfunction. Investigations into the cause involve a multidisciplinary team, including cardiologists, geneticists, and psychologists. In addition to a detailed medical history, family history and circumstances surrounding the event are important in determining the cause. Clinical investigations including an electrocardiogram are fundamental in diagnosis and should be interpreted cautiously because some children may have atypical presentations and an evolving phenotype. The potential for misdiagnosis exists that could lead to incorrect long-term management strategies. If an inherited condition is suspected, genetic testing of the patient and cascade screening of family members is recommended with genetic counselling and psychological support. Medical management is left to the treating physician acknowledging that a clear diagnosis cannot be made in approximately half of cases. Secondary prevention implantable defibrillators are widely deployed but can be associated with complications in young patients. A plan for safe return to activity is recommended along with a proper transition of care into adulthood. Broad screening of the general population for arrhythmia syndromes is not recommended; preventative measures include screening paediatric patients for risk factors by their primary care physician. Several milestone events or activities that take place in youth could be used as opportunities to promote safety. Further work into risk stratification of this paediatric population through patient registries and greater awareness of cardiopulmonary resuscitation and automated external defibrillator use in saving lives is warranted.
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Affiliation(s)
- Sonia Franciosi
- BC Children’s Hospital Heart Centre, Department of Pediatrics, University of British Columbia, Vancouver, British Columbia, Canada
| | - Dominic J. Abrams
- Boston Children’s Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Jodie Ingles
- Centre for Population Genomics, Garvan Institute of Medical Research, and UNSW Sydney, Sydney, New South Wales, Australia
- Centre for Population Genomics, Murdoch Children’s Research Institute, Melbourne, Victoria, Australia
| | - Shubhayan Sanatani
- BC Children’s Hospital Heart Centre, Department of Pediatrics, University of British Columbia, Vancouver, British Columbia, Canada
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8
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Pezzoli L, Pezzani L, Bonanomi E, Marrone C, Scatigno A, Cereda A, Bedeschi MF, Selicorni A, Gasperini S, Bini P, Maitz S, Maccioni C, Pedron C, Colombo L, Marchetti D, Bellini M, Lincesso AR, Perego L, Pingue M, Della Malva N, Mangili G, Ferrazzi P, Iascone M. Not Only Diagnostic Yield: Whole-Exome Sequencing in Infantile Cardiomyopathies Impacts on Clinical and Family Management. J Cardiovasc Dev Dis 2021; 9:jcdd9010002. [PMID: 35050212 PMCID: PMC8780486 DOI: 10.3390/jcdd9010002] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 12/14/2021] [Accepted: 12/17/2021] [Indexed: 12/26/2022] Open
Abstract
Whole-exome sequencing (WES) is a powerful and comprehensive tool for the genetic diagnosis of rare diseases, but few reports describe its timely application and clinical impact on infantile cardiomyopathies (CM). We conducted a retrospective analysis of patients with infantile CMs who had trio (proband and parents)-WES to determine whether results contributed to clinical management in urgent and non-urgent settings. Twenty-nine out of 42 enrolled patients (69.0%) received a definitive molecular diagnosis. The mean time-to-diagnosis was 9.7 days in urgent settings, and 17 out of 24 patients (70.8%) obtained an etiological classification. In non-urgent settings, the mean time-to-diagnosis was 225 days, and 12 out of 18 patients (66.7%) had a molecular diagnosis. In 37 out of 42 patients (88.1%), the genetic findings contributed to clinical management, including heart transplantation, palliative care, or medical treatment, independent of the patient’s critical condition. All 29 patients and families with a definitive diagnosis received specific counseling about recurrence risk, and in seven (24.1%) cases, the result facilitated diagnosis in parents or siblings. In conclusion, genetic diagnosis significantly contributes to patients’ clinical and family management, and trio-WES should be performed promptly to be an essential part of care in infantile cardiomyopathy, maximizing its clinical utility.
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Affiliation(s)
- Laura Pezzoli
- Laboratorio di Genetica Medica, ASST Papa Giovanni XXIII, 24127 Bergamo, Italy; (L.P.); (L.P.); (D.M.); (M.B.); (A.R.L.); (L.P.); (M.P.); (N.D.M.)
| | - Lidia Pezzani
- Laboratorio di Genetica Medica, ASST Papa Giovanni XXIII, 24127 Bergamo, Italy; (L.P.); (L.P.); (D.M.); (M.B.); (A.R.L.); (L.P.); (M.P.); (N.D.M.)
- Pediatria ad Alta Intensità di Cura, Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico, 20122 Milano, Italy
| | - Ezio Bonanomi
- Terapia Intensiva Pediatrica, ASST Papa Giovanni XXIII, 24127 Bergamo, Italy;
| | - Chiara Marrone
- Cardiologia Pediatrica, Fondazione G. Monasterio, 54100 Massa, Italy;
| | - Agnese Scatigno
- Pediatria, ASST Papa Giovanni XXIII, 24127 Bergamo, Italy; (A.S.); (A.C.)
| | - Anna Cereda
- Pediatria, ASST Papa Giovanni XXIII, 24127 Bergamo, Italy; (A.S.); (A.C.)
| | - Maria Francesca Bedeschi
- Genetica Medica, Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico, 20122 Milano, Italy;
| | | | - Serena Gasperini
- Malattie Metaboliche Rare, Dipartimento di Pediatria, Fondazione MBBM, ASST, 20900 Monza, Italy;
| | - Paolo Bini
- Terapia Intensiva Neonatale, ASST Lariana, 22100 Como, Italy;
| | - Silvia Maitz
- Ambulatorio di Genetica Pediatrica, Clinica Pediatrica, Fondazione MBBM, Ospedale S. Gerardo, 20900 Monza, Italy;
| | - Carla Maccioni
- Terapia Intensiva Neonatale, Ospedale A. Manzoni, ASST, 23900 Lecco, Italy;
| | - Cristina Pedron
- Cardiologia, Ospedale di Bolzano, Azienda Sanitaria dell’Alto Adige, 39100 Bolzano, Italy;
| | - Lorenzo Colombo
- NICU Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico, 20122 Milano, Italy;
| | - Daniela Marchetti
- Laboratorio di Genetica Medica, ASST Papa Giovanni XXIII, 24127 Bergamo, Italy; (L.P.); (L.P.); (D.M.); (M.B.); (A.R.L.); (L.P.); (M.P.); (N.D.M.)
| | - Matteo Bellini
- Laboratorio di Genetica Medica, ASST Papa Giovanni XXIII, 24127 Bergamo, Italy; (L.P.); (L.P.); (D.M.); (M.B.); (A.R.L.); (L.P.); (M.P.); (N.D.M.)
| | - Anna Rita Lincesso
- Laboratorio di Genetica Medica, ASST Papa Giovanni XXIII, 24127 Bergamo, Italy; (L.P.); (L.P.); (D.M.); (M.B.); (A.R.L.); (L.P.); (M.P.); (N.D.M.)
| | - Loredana Perego
- Laboratorio di Genetica Medica, ASST Papa Giovanni XXIII, 24127 Bergamo, Italy; (L.P.); (L.P.); (D.M.); (M.B.); (A.R.L.); (L.P.); (M.P.); (N.D.M.)
| | - Monica Pingue
- Laboratorio di Genetica Medica, ASST Papa Giovanni XXIII, 24127 Bergamo, Italy; (L.P.); (L.P.); (D.M.); (M.B.); (A.R.L.); (L.P.); (M.P.); (N.D.M.)
| | - Nunzia Della Malva
- Laboratorio di Genetica Medica, ASST Papa Giovanni XXIII, 24127 Bergamo, Italy; (L.P.); (L.P.); (D.M.); (M.B.); (A.R.L.); (L.P.); (M.P.); (N.D.M.)
| | - Giovanna Mangili
- Patologia Neonatale, ASST Papa Giovanni XXIII, 24127 Bergamo, Italy;
| | - Paolo Ferrazzi
- Centro Cardiomiopatia Ipertrofica, Policlinico di Monza, 20900 Monza, Italy;
| | - Maria Iascone
- Laboratorio di Genetica Medica, ASST Papa Giovanni XXIII, 24127 Bergamo, Italy; (L.P.); (L.P.); (D.M.); (M.B.); (A.R.L.); (L.P.); (M.P.); (N.D.M.)
- Correspondence: ; Tel.: +39-0352678112
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