1
|
Cianci V, Forzese E, Sapienza D, Cardia L, Cianci A, Germanà A, Tornese L, Ieni A, Gualniera P, Asmundo A, Mondello C. Morphological and Genetic Aspects for Post-Mortem Diagnosis of Hypertrophic Cardiomyopathy: A Systematic Review. Int J Mol Sci 2024; 25:1275. [PMID: 38279275 PMCID: PMC10816624 DOI: 10.3390/ijms25021275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Revised: 01/15/2024] [Accepted: 01/18/2024] [Indexed: 01/28/2024] Open
Abstract
Hypertrophic cardiomyopathy (HCM) is one of the most common genetic cardiovascular diseases, and it shows an autosomal dominant pattern of inheritance. HCM can be clinically silent, and sudden unexpected death due to malignant arrhythmias may be the first manifestation. Thus, the HCM diagnosis could be performed at a clinical and judicial autopsy and offer useful findings on morphological features; moreover, it could integrate the knowledge on the genetic aspect of the disease. This review aims to systematically analyze the literature on the main post-mortem investigations and the related findings of HCM to reach a well-characterized and stringent diagnosis; the review was performed using PubMed and Scopus databases. The articles on the post-mortem evaluation of HCM by gross and microscopic evaluation, imaging, and genetic test were selected; a total of 36 studies were included. HCM was described with a wide range of gross findings, and there were cases without morphological alterations. Myocyte hypertrophy, disarray, fibrosis, and small vessel disease were the main histological findings. The post-mortem genetic tests allowed the diagnosis to be reached in cases without morpho-structural abnormalities; clinical and forensic pathologists have a pivotal role in HCM diagnosis; they contribute to a better definition of the disease and also provide data on the genotype-phenotype correlation, which is useful for clinical research.
Collapse
Affiliation(s)
- Vincenzo Cianci
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, University of Messina, Via Consolare Valeria 1, 98125 Messina, Italy; (V.C.); (E.F.); (D.S.); (L.T.); (P.G.)
| | - Elena Forzese
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, University of Messina, Via Consolare Valeria 1, 98125 Messina, Italy; (V.C.); (E.F.); (D.S.); (L.T.); (P.G.)
| | - Daniela Sapienza
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, University of Messina, Via Consolare Valeria 1, 98125 Messina, Italy; (V.C.); (E.F.); (D.S.); (L.T.); (P.G.)
| | - Luigi Cardia
- Department of Human Pathology of Adult and Childhood “Gaetano Barresi”, University of Messina, Via C. Valeria 1, 98125 Messina, Italy; (L.C.); (A.I.)
| | - Alessio Cianci
- Department of Cardiovascular Medicine, Fondazione Policlinico Universitario A. Gemelli-IRCCS, Largo A. Gemelli 8, 00168 Rome, Italy;
| | - Antonino Germanà
- Zebrafish Neuromorphology Laboratory, Department of Veterinary Sciences, University of Messina, Via Palatucci snc, 98168 Messina, Italy;
| | - Lorenzo Tornese
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, University of Messina, Via Consolare Valeria 1, 98125 Messina, Italy; (V.C.); (E.F.); (D.S.); (L.T.); (P.G.)
| | - Antonio Ieni
- Department of Human Pathology of Adult and Childhood “Gaetano Barresi”, University of Messina, Via C. Valeria 1, 98125 Messina, Italy; (L.C.); (A.I.)
| | - Patrizia Gualniera
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, University of Messina, Via Consolare Valeria 1, 98125 Messina, Italy; (V.C.); (E.F.); (D.S.); (L.T.); (P.G.)
| | - Alessio Asmundo
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, University of Messina, Via Consolare Valeria 1, 98125 Messina, Italy; (V.C.); (E.F.); (D.S.); (L.T.); (P.G.)
| | - Cristina Mondello
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, University of Messina, Via Consolare Valeria 1, 98125 Messina, Italy; (V.C.); (E.F.); (D.S.); (L.T.); (P.G.)
| |
Collapse
|
2
|
Compagnucci P, Volpato G, Falanga U, Cipolletta L, Conti MA, Grifoni G, Ciliberti G, Stronati G, Fogante M, Bergonti M, Sommariva E, Guerra F, Giovagnoni A, Dello Russo A, Casella M. Myocardial Inflammation, Sports Practice, and Sudden Cardiac Death: 2021 Update. MEDICINA (KAUNAS, LITHUANIA) 2021; 57:277. [PMID: 33802881 PMCID: PMC8002711 DOI: 10.3390/medicina57030277] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Revised: 03/02/2021] [Accepted: 03/10/2021] [Indexed: 02/07/2023]
Abstract
Myocardial inflammation is an important cause of cardiovascular morbidity and sudden cardiac death in athletes. The relationship between sports practice and myocardial inflammation is complex, and recent data from studies concerning cardiac magnetic resonance imaging and endomyocardial biopsy have substantially added to our understanding of the challenges encountered in the comprehensive care of athletes with myocarditis or inflammatory cardiomyopathy (ICM). In this review, we provide an overview of the current knowledge on the epidemiology, pathophysiology, diagnosis, and treatment of myocarditis, ICM, and myopericarditis/perimyocarditis in athletes, with a special emphasis on arrhythmias, patient-tailored therapies, and sports eligibility issues.
Collapse
Affiliation(s)
- Paolo Compagnucci
- Cardiology and Arrhythmology Clinic, University Hospital “Ospedali Riuniti Umberto I-Lancisi-Salesi”, 60126 Ancona, Italy; (G.V.); (U.F.); (L.C.); (M.A.C.); (G.G.); (G.C.); (G.S.); (F.G.); (A.D.R.); (M.C.)
- Department of Biomedical Science and Public Health, Marche Polytechnic University, 60121 Ancona, Italy
| | - Giovanni Volpato
- Cardiology and Arrhythmology Clinic, University Hospital “Ospedali Riuniti Umberto I-Lancisi-Salesi”, 60126 Ancona, Italy; (G.V.); (U.F.); (L.C.); (M.A.C.); (G.G.); (G.C.); (G.S.); (F.G.); (A.D.R.); (M.C.)
- Department of Biomedical Science and Public Health, Marche Polytechnic University, 60121 Ancona, Italy
| | - Umberto Falanga
- Cardiology and Arrhythmology Clinic, University Hospital “Ospedali Riuniti Umberto I-Lancisi-Salesi”, 60126 Ancona, Italy; (G.V.); (U.F.); (L.C.); (M.A.C.); (G.G.); (G.C.); (G.S.); (F.G.); (A.D.R.); (M.C.)
- Department of Biomedical Science and Public Health, Marche Polytechnic University, 60121 Ancona, Italy
| | - Laura Cipolletta
- Cardiology and Arrhythmology Clinic, University Hospital “Ospedali Riuniti Umberto I-Lancisi-Salesi”, 60126 Ancona, Italy; (G.V.); (U.F.); (L.C.); (M.A.C.); (G.G.); (G.C.); (G.S.); (F.G.); (A.D.R.); (M.C.)
| | - Manuel Antonio Conti
- Cardiology and Arrhythmology Clinic, University Hospital “Ospedali Riuniti Umberto I-Lancisi-Salesi”, 60126 Ancona, Italy; (G.V.); (U.F.); (L.C.); (M.A.C.); (G.G.); (G.C.); (G.S.); (F.G.); (A.D.R.); (M.C.)
| | - Gino Grifoni
- Cardiology and Arrhythmology Clinic, University Hospital “Ospedali Riuniti Umberto I-Lancisi-Salesi”, 60126 Ancona, Italy; (G.V.); (U.F.); (L.C.); (M.A.C.); (G.G.); (G.C.); (G.S.); (F.G.); (A.D.R.); (M.C.)
| | - Giuseppe Ciliberti
- Cardiology and Arrhythmology Clinic, University Hospital “Ospedali Riuniti Umberto I-Lancisi-Salesi”, 60126 Ancona, Italy; (G.V.); (U.F.); (L.C.); (M.A.C.); (G.G.); (G.C.); (G.S.); (F.G.); (A.D.R.); (M.C.)
| | - Giulia Stronati
- Cardiology and Arrhythmology Clinic, University Hospital “Ospedali Riuniti Umberto I-Lancisi-Salesi”, 60126 Ancona, Italy; (G.V.); (U.F.); (L.C.); (M.A.C.); (G.G.); (G.C.); (G.S.); (F.G.); (A.D.R.); (M.C.)
- Department of Biomedical Science and Public Health, Marche Polytechnic University, 60121 Ancona, Italy
| | - Marco Fogante
- Department of Radiology, University Hospital “Ospedali Riuniti Umberto I-Lancisi-Salesi”, 60121 Ancona, Italy; (M.F.); (A.G.)
| | - Marco Bergonti
- Department of Clinical Sciences and Community Health, University of Milan, 20138 Milan, Italy;
| | - Elena Sommariva
- Vascular Biology and Regenerative Medicine Unit, Centro Cardiologico Monzino IRCCS, 20138 Milan, Italy;
| | - Federico Guerra
- Cardiology and Arrhythmology Clinic, University Hospital “Ospedali Riuniti Umberto I-Lancisi-Salesi”, 60126 Ancona, Italy; (G.V.); (U.F.); (L.C.); (M.A.C.); (G.G.); (G.C.); (G.S.); (F.G.); (A.D.R.); (M.C.)
- Department of Biomedical Science and Public Health, Marche Polytechnic University, 60121 Ancona, Italy
| | - Andrea Giovagnoni
- Department of Radiology, University Hospital “Ospedali Riuniti Umberto I-Lancisi-Salesi”, 60121 Ancona, Italy; (M.F.); (A.G.)
| | - Antonio Dello Russo
- Cardiology and Arrhythmology Clinic, University Hospital “Ospedali Riuniti Umberto I-Lancisi-Salesi”, 60126 Ancona, Italy; (G.V.); (U.F.); (L.C.); (M.A.C.); (G.G.); (G.C.); (G.S.); (F.G.); (A.D.R.); (M.C.)
- Department of Biomedical Science and Public Health, Marche Polytechnic University, 60121 Ancona, Italy
| | - Michela Casella
- Cardiology and Arrhythmology Clinic, University Hospital “Ospedali Riuniti Umberto I-Lancisi-Salesi”, 60126 Ancona, Italy; (G.V.); (U.F.); (L.C.); (M.A.C.); (G.G.); (G.C.); (G.S.); (F.G.); (A.D.R.); (M.C.)
- Department of Clinical, Special and Dental Sciences, Marche Polytechnic University, 60121 Ancona, Italy
| |
Collapse
|
3
|
Liu HW, Huang LW, Chiu SN, Lue HC, Wu MH, Chen MR, Wang JK. Cardiac Screening for High Risk Sudden Cardiac Death in School-Aged Children. ACTA CARDIOLOGICA SINICA 2020; 36:641-648. [PMID: 33235421 DOI: 10.6515/acs.202011_36(6).20200515a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Background Sudden cardiac death (SCD) is an uncommon but significant cause of death in the young. Citywide cardiac screening of school-aged children has been performed in Taipei since 1989. In this study, we investigate the efficacy of this screening method for identifying those at high risk of SCD. Methods This study analyzed the data from the results of cardiac screening for school-aged children in Taipei from 2003 to 2014. The cardiac screening included: Stage I, questionnaire surveys, simplified phonocardiography test and simplified electrocardiography (ECG) test; Stage II, physical examination and auscultation by a pediatric cardiologist for all children who had abnormal findings in stage I screening; Stage III, referral to a pediatric cardiologist for further examinations. Logistic regression and decision tree analyses were performed. Results A total of 566,447 students were screened, of whom 685 were identified as being at high risk of SCD. The most common causes of being at high risk of SCD included Wolff-Parkinson-White syndrome, long QT syndrome, cardiomyopathy and Marfan's syndrome. Using logistic regression analysis, the simplified ECG test was identified as being the most effective tool (odds ratio = 16.4, p < 0.001) and past history as the second most crucial factor (odds ratio = 3.95, p < 0.001) for detecting a high risk of SCD. Decision tree analysis showed that serial studies with a past history and the simplified ECG test could accurately identify those at high risk of SCD. Conclusions Questionnaire survey and simplified electrocardiography test-based cardiovascular screening in school-aged children can identify those at high risk of SCD.
Collapse
Affiliation(s)
- Hsiu-Wen Liu
- Department of Business Administration, Soochow University
| | | | - Shuenn-Nan Chiu
- Department of Pediatrics, National Taiwan University Hospital and Medical College, National Taiwan University
| | - Hung-Chi Lue
- Department of Pediatrics, National Taiwan University Hospital and Medical College, National Taiwan University
| | - Mei-Hwan Wu
- Department of Pediatrics, National Taiwan University Hospital and Medical College, National Taiwan University
| | - Ming-Ren Chen
- Department of Pediatrics, MacKay Memorial Hospital and Mackay Junior College of Medicine, Nursing, and Management, Taipei, Taiwan
| | - Jou-Kou Wang
- Department of Pediatrics, National Taiwan University Hospital and Medical College, National Taiwan University
| |
Collapse
|
4
|
Sanghera AS, Singh N, Popkave A. Running Marathons with Blocked Coronary Arteries and Runners' Risk of Sudden Cardiac Death-Case Report and Review. Curr Sports Med Rep 2020; 19:107-109. [PMID: 32141904 DOI: 10.1249/jsr.0000000000000694] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
5
|
Ullal AJ, Abdelfattah RS, Ashley EA, Froelicher VF. Hypertrophic Cardiomyopathy as a Cause of Sudden Cardiac Death in the Young: A Meta-Analysis. Am J Med 2016; 129:486-496.e2. [PMID: 26800575 DOI: 10.1016/j.amjmed.2015.12.027] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Revised: 12/15/2015] [Accepted: 12/16/2015] [Indexed: 01/11/2023]
Abstract
BACKGROUND Sudden cardiac death is often linked with hypertrophic cardiomyopathy in young athletes, but with a divergence of study results. We performed a meta-analysis to compare the prevalence of sudden cardiac deaths associated with hypertrophic cardiomyopathy vs sudden cardiac deaths associated with structurally normal hearts. METHODS A structured search of MEDLINE was conducted for studies published from 1990 through 2014. Retrospective cohort studies, patient registries, and autopsy series examining sudden cardiac death etiology in young individuals (age ≤35 years) were included. A random-effects model was applied to generate pooled summary estimates of the percentage of sudden cardiac deaths with structurally normal hearts at postmortem vs those caused by hypertrophic cardiomyopathy. Heterogeneity was assessed using I(2). Subgroup analyses were conducted based on study location, patient age groups, and population types. RESULTS Thirty-four studies were included, representing a combined sample of 4605 subjects. The overall pooled percentage of sudden cardiac deaths caused by hypertrophic cardiomyopathy was 10.3% (95% confidence interval [CI], 8.0%-12.6%; I(2) = 87.2%), while sudden cardiac deaths with structurally normal hearts at death were more common (P <.001) at 26.7% (95% CI, 21.0%-32.3%; I(2) = 95.3%). In nonathlete subjects, the pooled percentage of sudden cardiac deaths associated with structurally normal hearts (30.7%; 95% CI, 23.0%-38.4%; I(2) = 96.3%) were significantly more common (P <.001) than sudden cardiac death caused by hypertrophic cardiomyopathy (7.8%; 95% CI, 5.8%-9.9%; I(2) = 80.1%). Among athletes, there was no significant difference between summary estimates of hypertrophic cardiomyopathy and structurally normal hearts (P = .57), except in Europe where structurally normal hearts were more common (P = .01). CONCLUSIONS Hypertrophic cardiomyopathy is not a more common finding at death than structurally normal hearts in young subjects with sudden cardiac death. Increased attention should be directed toward identifying causes of death associated with a structurally normal heart in subjects with sudden cardiac death.
Collapse
|
6
|
Chappex N, Schlaepfer J, Fellmann F, Bhuiyan ZA, Wilhelm M, Michaud K. Sudden cardiac death among general population and sport related population in forensic experience. J Forensic Leg Med 2015; 35:62-8. [PMID: 26344462 DOI: 10.1016/j.jflm.2015.07.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Revised: 06/19/2015] [Accepted: 07/23/2015] [Indexed: 11/26/2022]
Abstract
PURPOSE The goal of the study was to assess the causes and analyze the cases of sudden cardiac death (SCD) victims referred to the department of forensic medicine in Lausanne, with a particular focus on sports-related fatalities including also leisure sporting activities. To date, no such published assessment has been done nor for Switzerland nor for the central Europe. METHODS This is a retrospective study based on autopsy records of SCD victims, from 10 to 50 years of age, performed at the University Centre of Legal Medicine in Lausanne from 1995 to 2010. The study population was divided into two groups: sport-related (SR) and not sport-related (NSR) SCDs. RESULTS During the study period, 188 cases of SCD were recorded: 166 (88%) were NSR and 22 (12%) SR. The mean age of the 188 victims was 37.3 ± 10.1 years, with the majority of the cases being male (79%). A cause of death was established in 84%, and the pathology responsible for death varied according to the age of the victims. In the NSR group, the mean age was 38.2 ± 9.2 years and there was 82% of male. Coronary artery disease (CAD) was the main diagnosis in the victims aged 30-50 years. The majority of morphologically normal hearts were observed in the 15-29 year age range. There was no case in the 10-14 year age range. In the SR group, 91% of victims died during leisure sporting activities. In this group the mean age was 30.5 ± 13.5 years, with the majority being male (82%). The main cause of death was CAD, with 6 cases (27%) and a mean age of 40.8 ± 5.5 years. The youngest victim with CAD was 33 years old. A morphologically normal heart was observed in 5 cases (23%), with a mean age of 24.4 ± 14.9 years. The most frequently implicated sporting activities were hiking (26%) and swimming (17%). CONCLUSION In this study, CAD was the most common cause of death in both groups. Although this pathology most often affects adults over 35 years of age, there were also some victims under 35 years of age in both groups. SCDs during sport are mostly related to leisure sporting activities, for which preventive measures are not yet usually established. This study highlights also the need to inform both athletes and non athletes of the cardiovascular risks during sport activities and the role of a forensic autopsy and registries involving forensic pathologists for SR SCD.
Collapse
Affiliation(s)
- Nina Chappex
- University Center of Legal Medicine, Lausanne and Geneva, Chemin de la Vulliette 4, 1000 Lausanne 25, Switzerland
| | - Jürg Schlaepfer
- Department of Cardiology, University Hospital of Lausanne, 1011 Lausanne, Switzerland
| | - Florence Fellmann
- University Hospital of Lausanne, Service of Medical Genetics, 1011 Lausanne, Switzerland
| | - Zahurul A Bhuiyan
- University Hospital of Lausanne, Service of Medical Genetics, 1011 Lausanne, Switzerland
| | - Matthias Wilhelm
- Department of Cardiology, Inselspital, University Hospital Bern, 3010 Bern, Switzerland
| | - Katarzyna Michaud
- University Center of Legal Medicine, Lausanne and Geneva, Chemin de la Vulliette 4, 1000 Lausanne 25, Switzerland.
| |
Collapse
|
7
|
Kocovski L, Fernandes J. Sudden cardiac death: a modern pathology approach to hypertrophic cardiomyopathy. Arch Pathol Lab Med 2015; 139:413-6. [PMID: 25724039 DOI: 10.5858/arpa.2013-0489-rs] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Hypertrophic cardiomyopathy is one of the most common causes of sudden cardiac death among young adults and adolescents. Unfortunately, the first manifestation of the condition may be sudden death during exertion, such as sporting activities. Other clinical symptoms include exertional dyspnea, angina, and syncope. Postmortem examination often reveals asymmetrical septal thickening and mural plaque formation in the left ventricular outflow tract. Histologic analysis shows cardiac myocyte hypertrophy, myofiber disarray, and interstitial and replacement fibrosis. Molecular analysis for known genetic abnormalities is essential to genetic counseling of living relatives of decedents to assess and reduce the risk of sudden cardiac death from hypertrophic cardiomyopathy.
Collapse
Affiliation(s)
- Linda Kocovski
- From the Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Ontario, Canada (Dr Kocovski); and the Regional Forensic Pathology Unit, Hamilton General Hospital, Hamilton, Ontario, Canada (Dr Fernandes)
| | | |
Collapse
|
8
|
Mazzanti A, O'Rourke S, Ng K, Miceli C, Borio G, Curcio A, Esposito F, Napolitano C, Priori SG. The usual suspects in sudden cardiac death of the young: a focus on inherited arrhythmogenic diseases. Expert Rev Cardiovasc Ther 2014; 12:499-519. [PMID: 24650315 DOI: 10.1586/14779072.2014.894884] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Up to 14,500 young individuals die suddenly every year in Europe of cardiac pathologies. The majority of these tragic events are related to a group of genetic defects that predispose the development of malignant arrhythmias (inherited arrhythmogenic diseases [IADs]). IADs include both cardiomyopathies (hypertrophic cardiomyopathy, arrhythmogenic right ventricular cardiomyopathy, dilated cardiomyopathy) and channelopathies (long QT syndrome, short QT syndrome, Brugada syndrome and catecholaminergic polymorphic ventricular tachycardia). Every time an IAD is identified in a patient, other individuals in his/her family may be at risk of cardiac events. However; if a timely diagnosis is made, simple preventative measures may be applied. Genetic studies play a pivotal role in the diagnosis of IADs and may help in the management of patients and their relatives.
Collapse
Affiliation(s)
- Andrea Mazzanti
- Molecular Cardiology, IRCCS Salvatore Maugeri Foundation, Pavia, Italy
| | | | | | | | | | | | | | | | | |
Collapse
|
9
|
Jagu B, Charpentier F, Toumaniantz G. Identifying potential functional impact of mutations and polymorphisms: linking heart failure, increased risk of arrhythmias and sudden cardiac death. Front Physiol 2013; 4:254. [PMID: 24065925 PMCID: PMC3778269 DOI: 10.3389/fphys.2013.00254] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2013] [Accepted: 08/29/2013] [Indexed: 01/22/2023] Open
Abstract
Researchers and clinicians have discovered several important concepts regarding the mechanisms responsible for increased risk of arrhythmias, heart failure, and sudden cardiac death. One major step in defining the molecular basis of normal and abnormal cardiac electrical behavior has been the identification of single mutations that greatly increase the risk for arrhythmias and sudden cardiac death by changing channel-gating characteristics. Indeed, mutations in several genes encoding ion channels, such as SCN5A, which encodes the major cardiac Na+ channel, have emerged as the basis for a variety of inherited cardiac arrhythmias such as long QT syndrome, Brugada syndrome, progressive cardiac conduction disorder, sinus node dysfunction, or sudden infant death syndrome. In addition, genes encoding ion channel accessory proteins, like anchoring or chaperone proteins, which modify the expression, the regulation of endocytosis, and the degradation of ion channel a-subunits have also been reported as susceptibility genes for arrhythmic syndromes. The regulation of ion channel protein expression also depends on a fine-tuned balance among different other mechanisms, such as gene transcription, RNA processing, post-transcriptional control of gene expression by miRNA, protein synthesis, assembly and post-translational modification and trafficking. The aim of this review is to inventory, through the description of few representative examples, the role of these different biogenic mechanisms in arrhythmogenesis, HF and SCD in order to help the researcher to identify all the processes that could lead to arrhythmias. Identification of novel targets for drug intervention should result from further understanding of these fundamental mechanisms.
Collapse
Affiliation(s)
- Benoît Jagu
- INSERM, UMR1087, l'institut du thorax, IRS-UN Nantes, France ; CNRS, UMR6291 Nantes, France ; Faculté de Médecine, Université de Nantes Nantes, France
| | | | | |
Collapse
|
10
|
Jin BK, Bang JS, Choi EY, Kim GB, Kwon BS, Bae EJ, Noh CI, Choi JY, Kim WH. Implantable cardioverter defibrillator therapy in pediatric and congenital heart disease patients: a single tertiary center experience in Korea. KOREAN JOURNAL OF PEDIATRICS 2013; 56:125-9. [PMID: 23559974 PMCID: PMC3611046 DOI: 10.3345/kjp.2013.56.3.125] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/11/2012] [Revised: 10/16/2012] [Accepted: 10/25/2012] [Indexed: 11/27/2022]
Abstract
PURPOSE The use of implantable cardioverter defibrillators (ICDs) to prevent sudden cardiac death is increasing in children and adolescents. This study investigated the use of ICDs in children with congenital heart disease. METHODS This retrospective study was conducted on the clinical characteristics and effectiveness of ICD implantation at the department of pediatrics of a single tertiary center between 2007 and 2011. RESULTS Fifteen patients underwent ICD implantation. Their mean age at the time of implantation was 14.5±5.4 years (range, 2 to 22 years). The follow-up duration was 28.9±20.4 months. The cause of ICD implantation was cardiac arrest in 7, sustained ventricular tachycardia in 6, and syncope in 2 patients. The underlying disorders were as follows: ionic channelopathy in 6 patients (long QT type 3 in 4, catecholaminergic polymorphic ventricular tachycardia [CPVT] in 1, and J wave syndrome in 1), cardiomyopathy in 5 patients, and postoperative congenital heart disease in 4 patients. ICD coils were implanted in the pericardial space in 2 children (ages 2 and 6 years). Five patients received appropriate ICD shock therapy, and 2 patients received inappropriate shocks due to supraventricular tachycardia. During follow-up, 2 patients required lead dysfunction-related revision. One patient with CPVT suffered from an ICD storm that was resolved using sympathetic denervation surgery. CONCLUSION The overall ICD outcome was acceptable in most pediatric patients. Early diagnosis and timely ICD implantation are recommended for preventing sudden death in high-risk children and patients with congenital heart disease.
Collapse
Affiliation(s)
- Bo Kyung Jin
- Department of Pediatrics, Seoul National University Children's Hospital, Seoul, Korea
| | | | | | | | | | | | | | | | | |
Collapse
|
11
|
McDonough A, Callan K, Egizio K, Kenney K, Gray G, Mundry G, Re G. Student perceptions of sudden cardiac arrest: a qualitative inquiry. ACTA ACUST UNITED AC 2012; 21:523-7. [DOI: 10.12968/bjon.2012.21.9.523] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
12
|
Dissecting the substrate for sudden cardiac death in the absence of ischemic heart disease. Heart Rhythm 2011; 8:1576-7. [DOI: 10.1016/j.hrthm.2011.07.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/10/2011] [Indexed: 11/18/2022]
|