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Boisson A, De La Villeon G, Huguet H, Abassi H, Pasquie JL, Lavastre K, Matecki S, Guillaumont S, Requirand A, Calderon J, Amedro P. Physical activity and aerobic fitness in children with inherited cardiac diseases. Arch Cardiovasc Dis 2021; 114:727-736. [PMID: 34756533 DOI: 10.1016/j.acvd.2021.07.004] [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: 03/04/2021] [Revised: 07/01/2021] [Accepted: 07/27/2021] [Indexed: 10/20/2022]
Abstract
BACKGROUND Because of sports and exercise restrictions, children with inherited cardiac disease are at risk of physical deconditioning. Guidelines on sports participation in cardiovascular disease have become less restrictive over time, but their real-life application and behavioural impact have seldom been evaluated in children. AIMS We aimed to evaluate adherence to the 2020 European Society of Cardiology guidelines on sports and exercise in children with inherited cardiac arrhythmia and inherited cardiomyopathy; we also sought to evaluate their aerobic fitness, and the behavioural impact of inherited cardiac diseases on physical activity in children. METHODS Children aged 6-18 years with inherited cardiomyopathy or inherited cardiac arrhythmia were eligible for this cross-sectional study. Clinical, demographic and qualitative data were analysed. RESULTS A total of 32 children were included in the study (mean age 12.7±3.5 years). Most children (81.3%) complied with the 2020 European Society of Cardiology guidelines; they were physically active and had good overall aerobic fitness, with a mean peak oxygen uptake (VO2) value of 36.5±8.0mL/kg/min (84.0±17.2% of theoretical value). As a result of personal or parental behaviour, some children at risk of sudden cardiac death did not comply with the recommended upper limit of physical activity intensity, whereas others at low risk did not comply with the lower limit. CONCLUSION Most children with inherited cardiac arrhythmia or inherited cardiomyopathy complied with current 2020 European Society of Cardiology guidelines on sports cardiology and exercise in cardiovascular disease.
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Affiliation(s)
- Aymeric Boisson
- Paediatric and Congenital Cardiology Department, M3C Regional Reference Centre, University Hospital, 34295 Montpellier, France
| | - Gregoire De La Villeon
- Paediatric and Congenital Cardiology Department, M3C Regional Reference Centre, University Hospital, 34295 Montpellier, France; Paediatric Cardiology and Rehabilitation Unit, Saint-Pierre Institute, 34250 Palavas-Les-Flots, France
| | - Helena Huguet
- Clinical Research and Epidemiology Unit, CHU de Montpellier, University of Montpellier, 34295 Montpellier, France
| | - Hamouda Abassi
- Paediatric and Congenital Cardiology Department, M3C Regional Reference Centre, University Hospital, 34295 Montpellier, France; Inserm, PhyMedExp, CNRS, University of Montpellier, 34295 Montpellier, France
| | - Jean-Luc Pasquie
- Paediatric and Congenital Cardiology Department, M3C Regional Reference Centre, University Hospital, 34295 Montpellier, France; Inserm, PhyMedExp, CNRS, University of Montpellier, 34295 Montpellier, France
| | - Kathleen Lavastre
- Paediatric and Congenital Cardiology Department, M3C Regional Reference Centre, University Hospital, 34295 Montpellier, France
| | - Stefan Matecki
- Inserm, PhyMedExp, CNRS, University of Montpellier, 34295 Montpellier, France; Department of Physiology, CHU de Montpellier, 34295 Montpellier, France
| | - Sophie Guillaumont
- Paediatric and Congenital Cardiology Department, M3C Regional Reference Centre, University Hospital, 34295 Montpellier, France; Paediatric Cardiology and Rehabilitation Unit, Saint-Pierre Institute, 34250 Palavas-Les-Flots, France
| | - Anne Requirand
- Paediatric and Congenital Cardiology Department, M3C Regional Reference Centre, University Hospital, 34295 Montpellier, France
| | - Johanna Calderon
- Paediatric and Congenital Cardiology Department, M3C Regional Reference Centre, University Hospital, 34295 Montpellier, France; Inserm, PhyMedExp, CNRS, University of Montpellier, 34295 Montpellier, France
| | - Pascal Amedro
- Department of Paediatric and Adult Congenital Cardiology, M3C National Reference Centre, Bordeaux University Hospital, 33604 Pessac, France; Inserm, U1045, IHU Liryc, Bordeaux Cardio-Thoracic Research Centre, Electrophysiology and Heart Modelling Institute, University of Bordeaux, Fondation Bordeaux Université, 33604 Pessac, France.
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Simons E, Labro A, Saenen J, Nijak A, Sieliwonczyk E, Vandendriessche B, Dąbrowska M, Van Craenenbroeck EM, Schepers D, Van Laer L, Loeys BL, Alaerts M. Molecular autopsy and subsequent functional analysis reveal de novo DSG2 mutation as cause of sudden death. Eur J Med Genet 2021; 64:104322. [PMID: 34438094 DOI: 10.1016/j.ejmg.2021.104322] [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] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 08/15/2021] [Accepted: 08/22/2021] [Indexed: 11/28/2022]
Abstract
Sudden cardiac death (SCD) is a common cause of death in young adults. In up to 80% of cases a genetic cause is suspected. Next-generation sequencing of candidate genes can reveal the cause of SCD, provide prognostic management, and facilitate pre-symptomatic testing and prevention in relatives. Here we present a proband who experienced SCD in his sleep for which molecular autopsy was performed. We performed a post-mortem genetic analysis of a 49-year-old male who died during sleep after competitive kayaking, using a Cardiomyopathy and Primary Arrhythmia next-generation sequencing panel, each containing 51 candidate genes. Autopsy was not performed. Genetic testing of the proband resulted in missense variants in KCNQ1 (c.1449C > A; p.(Asn483Lys)) and DSG2 (c.2979G > T; p.(Gln993His)), both absent from the gnomAD database. Familial segregation analysis showed de novo occurrence of the DSG2 variant and presence of the KCNQ1 variant in the proband's mother and daughter. KCNQ1 p.(Asn483Lys) was predicted to be pathogenic by MutationTaster. However, none of the KCNQ1 variant carrying family members showed long QTc on ECG or Holter. We further functionally analysed this variant using patch-clamp in a heterologous expression system (Chinese Hamster Ovary (CHO) cells) expressing the KCNQ1 mutant in combination with KCNE1 wild type protein and showed no significant changes in electrophysiological function of Kv7.1. Based on the above evidence, we concluded that the DSG2 p.(Gln993His) variant is the most likely cause of SCD in the presented case, and that there is insufficient evidence that the identified KCNQ1 p.(Asn483Lys) variant would confer risk for SCD in his mother and daughter. Fortunately, the DSG2 variant was not inherited by the proband's two children. This case report indicates the added value of molecular autopsy and the importance of subsequent functional study of variants to inform patients and family members about the risk of variants they might carry.
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Affiliation(s)
- Eline Simons
- Cardiogenetics Research Group, Center of Medical Genetics, University of Antwerp and Antwerp University Hospital, Antwerp, Belgium
| | - Alain Labro
- Laboratory for Molecular, Cellular and Network Excitability, University of Antwerp, Antwerp, Belgium; Department of Basic and Applied Medical Sciences, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium
| | - Johan Saenen
- Department of Cardiology, Antwerp University Hospital, Antwerp, Belgium
| | - Aleksandra Nijak
- Cardiogenetics Research Group, Center of Medical Genetics, University of Antwerp and Antwerp University Hospital, Antwerp, Belgium
| | - Ewa Sieliwonczyk
- Cardiogenetics Research Group, Center of Medical Genetics, University of Antwerp and Antwerp University Hospital, Antwerp, Belgium
| | - Bert Vandendriessche
- Cardiogenetics Research Group, Center of Medical Genetics, University of Antwerp and Antwerp University Hospital, Antwerp, Belgium
| | - Małgorzata Dąbrowska
- Laboratory for Molecular, Cellular and Network Excitability, University of Antwerp, Antwerp, Belgium
| | | | - Dorien Schepers
- Cardiogenetics Research Group, Center of Medical Genetics, University of Antwerp and Antwerp University Hospital, Antwerp, Belgium
| | - Lut Van Laer
- Cardiogenetics Research Group, Center of Medical Genetics, University of Antwerp and Antwerp University Hospital, Antwerp, Belgium
| | - Bart L Loeys
- Cardiogenetics Research Group, Center of Medical Genetics, University of Antwerp and Antwerp University Hospital, Antwerp, Belgium
| | - Maaike Alaerts
- Cardiogenetics Research Group, Center of Medical Genetics, University of Antwerp and Antwerp University Hospital, Antwerp, Belgium.
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Amedro P, Werner O, Abassi H, Boisson A, Souilla L, Guillaumont S, Calderon J, Requirand A, Vincenti M, Pommier V, Matecki S, De La Villeon G, Lavastre K, Lacampagne A, Picot MC, Beyler C, Delclaux C, Dulac Y, Guitarte A, Charron P, Denjoy-Urbain I, Probst V, Baruteau AE, Chevalier P, Di Filippo S, Thambo JB, Bonnet D, Pasquie JL. Health-related quality of life and physical activity in children with inherited cardiac arrhythmia or inherited cardiomyopathy: the prospective multicentre controlled QUALIMYORYTHM study rationale, design and methods. Health Qual Life Outcomes 2021; 19:187. [PMID: 34321045 PMCID: PMC8317438 DOI: 10.1186/s12955-021-01825-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 04/10/2021] [Accepted: 07/18/2021] [Indexed: 02/07/2023] Open
Abstract
Background Advances in paediatric cardiology have improved the prognosis of children with inherited cardiac disorders. However, health-related quality of life (QoL) and physical activity have been scarcely analysed in children with inherited cardiac arrhythmia or inherited cardiomyopathy. Moreover, current guidelines on the eligibility of young athletes with inherited cardiac disorders for sports participation mainly rely on expert opinions and remain controversial. Methods The QUALIMYORYTHM trial is a multicentre observational controlled study. The main objective is to compare the QoL of children aged 6 to 17 years old with inherited cardiac arrhythmia (long QT syndrome, Brugada syndrome, catecholaminergic polymorphic ventricular tachycardia, or arrhythmogenic right ventricular dysplasia), or inherited cardiomyopathy (hypertrophic, dilated, or restrictive cardiomyopathy), to that of age and gender-matched healthy subjects. The secondary objective is to assess their QoL according to the disease’s clinical and genetic characteristics, the level of physical activity and motivation for sports, the exercise capacity, and the socio-demographic data. Participants will wear a fitness tracker (ActiGraph GT3X accelerometer) for 2 weeks. A total of 214 children are required to observe a significant difference of 7 ± 15 points in the PedsQL, with a power of 90% and an alpha risk of 5%. Discussion After focusing on the survival in children with inherited cardiac disorders, current research is expanding to patient-reported outcomes and secondary prevention. The QUALIMYORYTHM trial intends to improve the level of evidence for future guidelines on sports eligibility in this population. Trial registration ClinicalTrials.gov Identifier: NCT04712136, registered on January 15th, 2021 (https://clinicaltrials.gov/ct2/show/NCT04712136).
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Affiliation(s)
- Pascal Amedro
- Department of Paediatric and Adult Congenital Cardiology, M3C National Reference Centre, Haut-Lévêque Cardiology Hospital, Bordeaux University Hospital, Avenue de Magellan, 33604, Pessac Cedex, France. .,INSERM, Bordeaux Cardio-Thoracic Research Centre, U1045, University of Bordeaux, Pessac, France. .,IHU Liryc, Electrophysiology and Heart Modelling Institute, Fondation Bordeaux Université, Pessac, France.
| | - Oscar Werner
- Paediatric and Congenital Cardiology Department, M3C Regional Reference CHD Centre, Montpellier University Hospital, Montpellier, France
| | - Hamouda Abassi
- Paediatric and Congenital Cardiology Department, M3C Regional Reference CHD Centre, Montpellier University Hospital, Montpellier, France.,PhyMedExp, INSERM, CNRS, University of Montpellier, Montpellier, France
| | - Aymeric Boisson
- Paediatric and Congenital Cardiology Department, M3C Regional Reference CHD Centre, Montpellier University Hospital, Montpellier, France
| | - Luc Souilla
- Paediatric and Congenital Cardiology Department, M3C Regional Reference CHD Centre, Montpellier University Hospital, Montpellier, France
| | - Sophie Guillaumont
- Paediatric and Congenital Cardiology Department, M3C Regional Reference CHD Centre, Montpellier University Hospital, Montpellier, France.,Paediatric Cardiology and Rehabilitation Unit, Institut-Saint-Pierre, Palavas-Les-Flots, France
| | - Johanna Calderon
- Paediatric and Congenital Cardiology Department, M3C Regional Reference CHD Centre, Montpellier University Hospital, Montpellier, France.,PhyMedExp, INSERM, CNRS, University of Montpellier, Montpellier, France
| | - Anne Requirand
- Paediatric and Congenital Cardiology Department, M3C Regional Reference CHD Centre, Montpellier University Hospital, Montpellier, France
| | - Marie Vincenti
- Paediatric and Congenital Cardiology Department, M3C Regional Reference CHD Centre, Montpellier University Hospital, Montpellier, France.,PhyMedExp, INSERM, CNRS, University of Montpellier, Montpellier, France
| | - Victor Pommier
- Paediatric and Congenital Cardiology Department, M3C Regional Reference CHD Centre, Montpellier University Hospital, Montpellier, France.,Paediatric Cardiology and Rehabilitation Unit, Institut-Saint-Pierre, Palavas-Les-Flots, France
| | - Stefan Matecki
- Paediatric and Congenital Cardiology Department, M3C Regional Reference CHD Centre, Montpellier University Hospital, Montpellier, France.,PhyMedExp, INSERM, CNRS, University of Montpellier, Montpellier, France
| | - Gregoire De La Villeon
- Paediatric and Congenital Cardiology Department, M3C Regional Reference CHD Centre, Montpellier University Hospital, Montpellier, France.,Paediatric Cardiology and Rehabilitation Unit, Institut-Saint-Pierre, Palavas-Les-Flots, France
| | - Kathleen Lavastre
- Paediatric and Congenital Cardiology Department, M3C Regional Reference CHD Centre, Montpellier University Hospital, Montpellier, France
| | - Alain Lacampagne
- PhyMedExp, INSERM, CNRS, University of Montpellier, Montpellier, France
| | - Marie-Christine Picot
- Epidemiology and Clinical Research Department, Montpellier University Hospital, Montpellier, France
| | - Constance Beyler
- Paediatric Cardiology and Physiology Department, Robert Debré University Hospital, University of Paris, AP-HP, Paris, France
| | - Christophe Delclaux
- Paediatric Cardiology and Physiology Department, Robert Debré University Hospital, University of Paris, AP-HP, Paris, France
| | - Yves Dulac
- Paediatric Cardiology Department, M3C Regional Reference Centre, Toulouse University Hospital, Toulouse, France
| | - Aitor Guitarte
- Paediatric Cardiology Department, M3C Regional Reference Centre, Toulouse University Hospital, Toulouse, France
| | - Philippe Charron
- Department of Cardiology, National Reference Centre for Inherited Cardiomyopathy, University of Paris, AP-HP, Paris, France
| | - Isabelle Denjoy-Urbain
- Department of Cardiology, National Reference Centre for Inherited Cardiomyopathy, University of Paris, AP-HP, Paris, France
| | - Vincent Probst
- Department of Cardiology, National Reference Centre for Inherited Cardiac Arrhythmia, L'institut du thorax, INSERM, CNRS, University of Nantes, Nantes University Hospital, Nantes, France
| | - Alban-Elouen Baruteau
- Department of Pediatric Cardiology and Pediatric Cardiac Surgery, L'Institut du Thorax, INSERM, CNRS, University of Nantes, Nantes University Hospital, Nantes, France
| | - Philippe Chevalier
- Department of Congenital Cardiology, National Reference Centre for Inherited Cardiac Arrhythmia, University of Lyon, Lyon University Hospital, Lyon, France
| | - Sylvie Di Filippo
- Department of Congenital Cardiology, National Reference Centre for Inherited Cardiac Arrhythmia, University of Lyon, Lyon University Hospital, Lyon, France
| | - Jean-Benoit Thambo
- Department of Paediatric and Adult Congenital Cardiology, M3C National Reference Centre, Haut-Lévêque Cardiology Hospital, Bordeaux University Hospital, Avenue de Magellan, 33604, Pessac Cedex, France.,INSERM, Bordeaux Cardio-Thoracic Research Centre, U1045, University of Bordeaux, Pessac, France.,IHU Liryc, Electrophysiology and Heart Modelling Institute, Fondation Bordeaux Université, Pessac, France
| | - Damien Bonnet
- Paediatric Cardiology Department, Necker-Enfants malades, M3C National Reference Centre, University of Paris, AP-HP, Paris, France
| | - Jean-Luc Pasquie
- Cardiology Department of Cardiology, Regional Reference Centre for Inherited Cardiac Arrhythmia, Montpellier University Hospital, Montpellier, France.,PhyMedExp, INSERM, CNRS, University of Montpellier, Montpellier, France
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Juang JMJ, Binda A, Lee SJ, Hwang JJ, Chen WJ, Liu YB, Lin LY, Yu CC, Ho LT, Huang HC, Chen CYJ, Lu TP, Lai LC, Yeh SFS, Lai LP, Chuang EY, Rivolta I, Antzelevitch C. GSTM3 variant is a novel genetic modifier in Brugada syndrome, a disease with risk of sudden cardiac death. EBioMedicine 2020; 57:102843. [PMID: 32645615 PMCID: PMC7341360 DOI: 10.1016/j.ebiom.2020.102843] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [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: 03/11/2020] [Revised: 05/28/2020] [Accepted: 06/03/2020] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Brugada syndrome (BrS) is a rare inherited disease causing sudden cardiac death (SCD). Copy number variants (CNVs) can contribute to disease susceptibility, but their role in Brugada syndrome (BrS) is unknown. We aimed to identify a CNV associated with BrS and elucidated its clinical implications. METHODS We enrolled 335 unrelated BrS patients from 2000 to 2018 in the Taiwanese population. Microarray and exome sequencing were used for discovery phase whereas Sanger sequencing was used for the validation phase. HEK cells and zebrafish were used to characterize the function of the CNV variant. FINDINGS A copy number deletion of GSTM3 (chr1:109737011-109737301, hg38) containing the eighth exon and the transcription stop codon was observed in 23.9% of BrS patients versus 0.8% of 15,829 controls in Taiwan Biobank (P < 0.001), and 0% in gnomAD. Co-segregation analysis showed that the co-segregation rate was 20%. Patch clamp experiments showed that in an oxidative stress environment, GSTM3 down-regulation leads to a significant decrease of cardiac sodium channel current amplitude. Ventricular arrhythmia incidence was significantly greater in gstm3 knockout zebrafish at baseline and after flecainide, but was reduced after quinidine, consistent with clinical observations. BrS patients carrying the GSTM3 deletion had higher rates of sudden cardiac arrest and syncope compared to those without (OR: 3.18 (1.77-5.74), P<0.001; OR: 1.76 (1.02-3.05), P = 0.04, respectively). INTERPRETATION This GSTM3 deletion is frequently observed in BrS patients and is associated with reduced INa, pointing to this as a novel potential genetic modifier/risk predictor for the development of the electrocardiographic and arrhythmic manifestations of BrS. FUNDING This work was supported by the Ministry of Science and Technology (107-2314-B-002-261-MY3 to J.M.J. Juang), and by grants HL47678, HL138103 and HL152201 from the National Institutes of Health to CA.
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Affiliation(s)
- Jyh-Ming Jimmy Juang
- Cardiovascular Center and Division of Cardiology, Department of Internal Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
| | - Anna Binda
- University of Milano Bicocca School of Medicine and Surgery, Via Cadore, 48, 20900 Monza (MB), Italy
| | - Shyh-Jye Lee
- Department of Life Science, National Taiwan University, Taipei, Taiwan
| | - Juey-Jen Hwang
- Cardiovascular Center and Division of Cardiology, Department of Internal Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
| | - Wen-Jone Chen
- Cardiovascular Center and Division of Cardiology, Department of Internal Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
| | - Yen-Bin Liu
- Cardiovascular Center and Division of Cardiology, Department of Internal Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
| | - Lian-Yu Lin
- Cardiovascular Center and Division of Cardiology, Department of Internal Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
| | - Chih-Chieh Yu
- Cardiovascular Center and Division of Cardiology, Department of Internal Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
| | - Li-Ting Ho
- Cardiovascular Center and Division of Cardiology, Department of Internal Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
| | - Hui-Chun Huang
- Cardiovascular Center and Division of Cardiology, Department of Internal Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
| | - Ching-Yu Julius Chen
- Cardiovascular Center and Division of Cardiology, Department of Internal Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
| | - Tzu-Pin Lu
- Institute of Epidemiology and Preventive Medicine, National Taiwan University, Taipei, Taiwan; Department of Public Health, National Taiwan University, Taipei, Taiwan.
| | - Liang-Chuan Lai
- Graduate Institute of Physiology, National Taiwan University, Taipei, Taiwan
| | - Shih-Fan Sherri Yeh
- Department of Environmental and Occupational Medicine, National Taiwan University Hospital, Hsin-Chu branch and National Taiwan University College of Medicine, Taipei, Taiwan
| | - Ling-Ping Lai
- Cardiovascular Center and Division of Cardiology, Department of Internal Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
| | - Eric Y Chuang
- Graduate Institute of Biomedical Electronics and Bioinformatics, National Taiwan University, Taipei, Taiwan
| | - Ilaria Rivolta
- University of Milano Bicocca School of Medicine and Surgery, Via Cadore, 48, 20900 Monza (MB), Italy
| | - Charles Antzelevitch
- Lankenau Institute for Medical Research and Lankenau Heart Institute, Wynnewood, PA and Sidney Kimmel Medical College of Thomas Jefferson University, Philadelphia, PA, USA.
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Warring SK, Anderson HN, Bos JM, Ackerman MJ. Inaccurate diagnosis of Brugada syndrome in a healthy woman based on SCN5A mutation classification. HeartRhythm Case Rep 2017; 3:450-454. [PMID: 29062695 PMCID: PMC5643853 DOI: 10.1016/j.hrcr.2017.06.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Affiliation(s)
| | - Heather N. Anderson
- Department of Pediatric and Adolescent Medicine/Division of Pediatric Cardiology, Mayo Clinic, Rochester, Minnesota
| | - J. Martijn Bos
- Department of Pediatric and Adolescent Medicine/Division of Pediatric Cardiology, Mayo Clinic, Rochester, Minnesota
- Department of Molecular Pharmacology & Experimental Therapeutics, Windland Smith Rice Sudden Death Genomics Laboratory, Mayo Clinic, Rochester, Minnesota
| | - Michael J. Ackerman
- Department of Pediatric and Adolescent Medicine/Division of Pediatric Cardiology, Mayo Clinic, Rochester, Minnesota
- Department of Molecular Pharmacology & Experimental Therapeutics, Windland Smith Rice Sudden Death Genomics Laboratory, Mayo Clinic, Rochester, Minnesota
- Department of Cardiovascular Diseases/Division of Heart Rhythm Services, Mayo Clinic, Rochester, Minnesota
- Address reprint requests and correspondence: Dr Michael J. Ackerman, Mayo Clinic Windland Smith Rice Sudden Death Genomics Laboratory, Guggenheim 501, Mayo Clinic, 200 First St SW, Rochester, MN 55905.Mayo Clinic Windland Smith Rice Sudden Death Genomics LaboratoryGuggenheim 501, Mayo Clinic, 200 First St SWRochesterMN55905
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