1
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Takase B, Ikeda T, Shimizu W, Abe H, Aiba T, Chinushi M, Koba S, Kusano K, Niwano S, Takahashi N, Takatsuki S, Tanno K, Watanabe E, Yoshioka K, Amino M, Fujino T, Iwasaki YK, Kohno R, Kinoshita T, Kurita Y, Masaki N, Murata H, Shinohara T, Yada H, Yodogawa K, Kimura T, Kurita T, Nogami A, Sumitomo N. JCS/JHRS 2022 Guideline on Diagnosis and Risk Assessment of Arrhythmia. Circ J 2024; 88:1509-1595. [PMID: 37690816 DOI: 10.1253/circj.cj-22-0827] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 09/12/2023]
Affiliation(s)
| | - Takanori Ikeda
- Department of Cardiovascular Medicine, Toho University Faculty of Medicine
| | - Wataru Shimizu
- Department of Cardiovascular Medicine, Nippon Medical School
| | - Haruhiko Abe
- Department of Heart Rhythm Management, University of Occupational and Environmental Health, Japan
| | - Takeshi Aiba
- Department of Clinical Laboratory Medicine and Genetics, National Cerebral and Cardiovascular Center
| | - Masaomi Chinushi
- School of Health Sciences, Niigata University School of Medicine
| | - Shinji Koba
- Division of Cardiology, Department of Medicine, Showa University School of Medicine
| | - Kengo Kusano
- Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center
| | - Shinichi Niwano
- Department of Cardiovascular Medicine, Kitasato University School of Medicine
| | - Naohiko Takahashi
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University
| | - Seiji Takatsuki
- Department of Cardiology, Keio University School of Medicine
| | - Kaoru Tanno
- Cardiology Division, Cardiovascular Center, Showa University Koto-Toyosu Hospital
| | - Eiichi Watanabe
- Division of Cardiology, Department of Internal Medicine, Fujita Health University Bantane Hospital
| | | | - Mari Amino
- Department of Cardiology, Tokai University School of Medicine
| | - Tadashi Fujino
- Department of Cardiovascular Medicine, Toho University Faculty of Medicine
| | - Yu-Ki Iwasaki
- Department of Cardiovascular Medicine, Nippon Medical School
| | - Ritsuko Kohno
- Department of Heart Rhythm Management, University of Occupational and Environmental Health, Japan
| | - Toshio Kinoshita
- Department of Cardiovascular Medicine, Toho University Faculty of Medicine
| | - Yasuo Kurita
- Cardiovascular Center, International University of Health and Welfare, Mita Hospital
| | - Nobuyuki Masaki
- Department of Intensive Care Medicine, National Defense Medical College
| | | | - Tetsuji Shinohara
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University
| | - Hirotaka Yada
- Department of Cardiology, International University of Health and Welfare, Mita Hospital
| | - Kenji Yodogawa
- Department of Cardiovascular Medicine, Nippon Medical School
| | - Takeshi Kimura
- Cardiovascular Medicine, Kyoto University Graduate School of Medicine
| | | | - Akihiko Nogami
- Department of Cardiology, Faculty of Medicine, University of Tsukuba
| | - Naokata Sumitomo
- Department of Pediatric Cardiology, Saitama Medical University International Medical Center
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2
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Takase B, Ikeda T, Shimizu W, Abe H, Aiba T, Chinushi M, Koba S, Kusano K, Niwano S, Takahashi N, Takatsuki S, Tanno K, Watanabe E, Yoshioka K, Amino M, Fujino T, Iwasaki Y, Kohno R, Kinoshita T, Kurita Y, Masaki N, Murata H, Shinohara T, Yada H, Yodogawa K, Kimura T, Kurita T, Nogami A, Sumitomo N. JCS/JHRS 2022 Guideline on Diagnosis and Risk Assessment of Arrhythmia. J Arrhythm 2024; 40:655-752. [PMID: 39139890 PMCID: PMC11317726 DOI: 10.1002/joa3.13052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2024] [Accepted: 04/22/2024] [Indexed: 08/15/2024] Open
Affiliation(s)
| | - Takanori Ikeda
- Department of Cardiovascular MedicineToho University Faculty of Medicine
| | - Wataru Shimizu
- Department of Cardiovascular MedicineNippon Medical School
| | - Haruhiko Abe
- Department of Heart Rhythm ManagementUniversity of Occupational and Environmental HealthJapan
| | - Takeshi Aiba
- Department of Clinical Laboratory Medicine and GeneticsNational Cerebral and Cardiovascular Center
| | | | - Shinji Koba
- Division of Cardiology, Department of MedicineShowa University School of Medicine
| | - Kengo Kusano
- Department of Cardiovascular MedicineNational Cerebral and Cardiovascular Center
| | - Shinichi Niwano
- Department of Cardiovascular MedicineKitasato University School of Medicine
| | - Naohiko Takahashi
- Department of Cardiology and Clinical Examination, Faculty of MedicineOita University
| | | | - Kaoru Tanno
- Cardiovascular Center, Cardiology DivisionShowa University Koto‐Toyosu Hospital
| | - Eiichi Watanabe
- Division of Cardiology, Department of Internal MedicineFujita Health University Bantane Hospital
| | | | - Mari Amino
- Department of CardiologyTokai University School of Medicine
| | - Tadashi Fujino
- Department of Cardiovascular MedicineToho University Faculty of Medicine
| | - Yu‐ki Iwasaki
- Department of Cardiovascular MedicineNippon Medical School
| | - Ritsuko Kohno
- Department of Heart Rhythm ManagementUniversity of Occupational and Environmental HealthJapan
| | - Toshio Kinoshita
- Department of Cardiovascular MedicineToho University Faculty of Medicine
| | - Yasuo Kurita
- Cardiovascular Center, Mita HospitalInternational University of Health and Welfare
| | - Nobuyuki Masaki
- Department of Intensive Care MedicineNational Defense Medical College
| | | | - Tetsuji Shinohara
- Department of Cardiology and Clinical Examination, Faculty of MedicineOita University
| | - Hirotaka Yada
- Department of CardiologyInternational University of Health and Welfare Mita Hospital
| | - Kenji Yodogawa
- Department of Cardiovascular MedicineNippon Medical School
| | - Takeshi Kimura
- Cardiovascular MedicineKyoto University Graduate School of Medicine
| | | | - Akihiko Nogami
- Department of Cardiology, Faculty of MedicineUniversity of Tsukuba
| | - Naokata Sumitomo
- Department of Pediatric CardiologySaitama Medical University International Medical Center
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3
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Moturu A, Bhuchakra HP, Bodar YP, Gandhi SK, Patel P, Gutlapalli SD, Arulthasan V, Otterbeck P. Unmasking a Silent Killer and Understanding Sudden Cardiac Death in Brugada Syndrome: A Traditional Review. Cureus 2023; 15:e41076. [PMID: 37519561 PMCID: PMC10375830 DOI: 10.7759/cureus.41076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2023] [Accepted: 06/28/2023] [Indexed: 08/01/2023] Open
Abstract
Brugada syndrome (BrS) is an intricate and heterogeneous genetic disorder that engenders a formidable risk of life-threatening ventricular arrhythmias (VAs). While initially regarded as an electrophysiological aberration, emergent studies have illuminated the presence of underlying structural anomalies in select BrS cases. Although mutations in the SCN5A gene encoding the α-subunit of the cardiac sodium channel were originally identified as a primary causative factor; they account for only a fraction of the syndrome's multifaceted complexity pointing at genetic heterogeneity as a contributing factor. Remarkably, BrS has been linked to a higher incidence of fatal arrhythmic incidents and sudden cardiac death (SCD) with about 4% of SCD cases thought to be caused by BrS. Patients who spontaneously exhibit type one Brugada ECGs are more likely to experience cardiac events, emphasizing the importance of early risk stratification. To aid in risk stratification, the Shanghai score; a multifactorial risk stratification scoring system that incorporates ECG, clinical history, family history, and genetic test results; is utilized to identify those most susceptible to SCD. Beyond single ECGs, evaluation of arrhythmic findings from 24-hour Holter monitoring, ECG variables, electrophysiologic study (EPS) status in the temporal domain, and EPS data collected over time are all critical factors in risk classification. Among management options avoidance of triggers, early risk stratification, and implantation of an Implantable Cardioverter-Defibrillator (ICD) are recommended for asymptomatic patients. For symptomatic patients, pharmacotherapy and ICD implantation are available, with the latter being a highly effective choice for treating and preventing lethal arrhythmias in BrS.
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Affiliation(s)
- Aadya Moturu
- Department of Internal Medicine, Sri Ramaswamy Memorial Medical College Hospital and Research Centre, Chennai, IND
| | - Hamsa Priya Bhuchakra
- Department of Internal Medicine, Apollo Institute of Medical Sciences and Research, Hyderabad, IND
| | - Yashvant P Bodar
- Department of Internal Medicine, Orenburg State Medical University, Orenburg, RUS
| | | | - Priyansh Patel
- Department of Internal Medicine, California Institute of Behavioral Neurosciences & Psychology, Fairfield, USA
- Department of Internal Medicine, Medical College Baroda, Vadodara, IND
| | - Sai Dheeraj Gutlapalli
- Department of Internal Medicine, Richmond University Medical Center, New York City, USA
- Department of Internal Medicine, California Institute of Behavioral Neurosciences & Psychology, Fairfield, USA
| | | | - Philip Otterbeck
- Department of Internal Medicine, Richmond University Medical Center, New York City, USA
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4
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Sawalha K, Gupta S, López-Candales A. Early repolarization: Electrocardiographic cues to distinguish benign from malignant variants. Am J Med Sci 2023:S0002-9629(23)01172-2. [PMID: 37156459 DOI: 10.1016/j.amjms.2023.05.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 04/10/2023] [Accepted: 05/01/2023] [Indexed: 05/10/2023]
Abstract
Historically, early repolarization (ER) has been considered a marker of good health as it is more prevalent in athletes, younger persons, and at slower heart rates. However, contemporary reports, largely based on data from resuscitated sudden cardiac arrest patients, suggest an association between ER and an increased risk for sudden cardiac death and the development of malignant ventricular arrhythmias. Therefore, after we present a brief-case presentation, we intend to review a challenging topic in recognition of malignant variants and propose a four-step comprehensive approach to simplify ECG discrimination when assessing ER changes.
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Affiliation(s)
- Khalid Sawalha
- University of Missouri-Kansas City, Nutrition and Metabolism Fellowship, Kansas City, MO, USA
| | - Sanjaya Gupta
- Electrophysiology Division, Saint Luke's Mid-America Heart Institute, University of Missouri-Kansas City, Saint Luke's Blvd, MO, USA
| | - Angel López-Candales
- Section of Cardiovascular Medicine, University Health, Truman Medical Center, University of Missouri-Kansas City, Kansas City, MO, USA.
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5
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El-Azrak M, Darar C, Boutaybi M, El Ouafi N, Bazid Z. Sudden Cardiac Death Risk Stratification of the Early Repolarization Syndrome: An Updated Review of the Literature. Curr Cardiol Rep 2023; 25:203-212. [PMID: 36763218 DOI: 10.1007/s11886-023-01842-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 01/24/2023] [Indexed: 02/11/2023]
Abstract
PURPOSE OF REVIEW Early repolarization syndrome (ERS), once thought to be innocuous, has now been shown to be responsible for ventricular arrythmias and sudden cardiac death occurrence. This review will help the clinician to identify the patients who are most at risk for arrhythmias, so that they can adopt a preventive or secondary treatment approach, either of which is still poorly defined. RECENT FINDINGS Patients at high risk are found to be particularly young men, with a personal or family history of syncope or sudden death, who have an inferolateral ER on the electrocardiogram, more elevated J-point, longer J-wave duration and wider J angle, a horizontal or descending ST segment, lower T/R ratio, and small and/or inverted waves. The association with a structural heart disease or another channelopathy potentiates this arrhythmic risk. Taken together, these parameters allow prediction of the malignancy of ER pattern with a certain reliability. Further research is however needed to develop concrete risk stratification algorithms and the therapeutic strategies taken in function of it.
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Affiliation(s)
- Mohammed El-Azrak
- Department of Cardiology, Mohammed VI University Hospital, Oujda, Morocco.
| | - Charmake Darar
- Department of Cardiology, Mohammed VI University Hospital, Oujda, Morocco
| | - Mohammed Boutaybi
- Department of Cardiology, Mohammed VI University Hospital, Oujda, Morocco
| | - Noha El Ouafi
- Department of Cardiology, Mohammed VI University Hospital, Oujda, Morocco.,Epidemiological Laboratory of Clinical Research and Public Health, Faculty of Medicine and Pharmacy of Oujda, Mohammed First University, Oujda, Morocco
| | - Zakaria Bazid
- Department of Cardiology, Mohammed VI University Hospital, Oujda, Morocco
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6
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Popa IP, Șerban DN, Mărănducă MA, Șerban IL, Tamba BI, Tudorancea I. Brugada Syndrome: From Molecular Mechanisms and Genetics to Risk Stratification. Int J Mol Sci 2023; 24:ijms24043328. [PMID: 36834739 PMCID: PMC9967917 DOI: 10.3390/ijms24043328] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 01/13/2023] [Accepted: 02/06/2023] [Indexed: 02/11/2023] Open
Abstract
Brugada syndrome (BrS) is a rare hereditary arrhythmia disorder, with a distinctive ECG pattern, correlated with an increased risk of ventricular arrhythmias and sudden cardiac death (SCD) in young adults. BrS is a complex entity in terms of mechanisms, genetics, diagnosis, arrhythmia risk stratification, and management. The main electrophysiological mechanism of BrS requires further research, with prevailing theories centered on aberrant repolarization, depolarization, and current-load match. Computational modelling, pre-clinical, and clinical research show that BrS molecular anomalies result in excitation wavelength (k) modifications, which eventually increase the risk of arrhythmia. Although a mutation in the SCN5A (Sodium Voltage-Gated Channel Alpha Subunit 5) gene was first reported almost two decades ago, BrS is still currently regarded as a Mendelian condition inherited in an autosomal dominant manner with incomplete penetrance, despite the recent developments in the field of genetics and the latest hypothesis of additional inheritance pathways proposing a more complex mode of inheritance. In spite of the extensive use of the next-generation sequencing (NGS) technique with high coverage, genetics remains unexplained in a number of clinically confirmed cases. Except for the SCN5A which encodes the cardiac sodium channel NaV1.5, susceptibility genes remain mostly unidentified. The predominance of cardiac transcription factor loci suggests that transcriptional regulation is essential to the Brugada syndrome's pathogenesis. It appears that BrS is a multifactorial disease, which is influenced by several loci, each of which is affected by the environment. The primary challenge in individuals with a BrS type 1 ECG is to identify those who are at risk for sudden death, researchers propose the use of a multiparametric clinical and instrumental strategy for risk stratification. The aim of this review is to summarize the latest findings addressing the genetic architecture of BrS and to provide novel perspectives into its molecular underpinnings and novel models of risk stratification.
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Affiliation(s)
- Irene Paula Popa
- Cardiology Clinic, “St. Spiridon” County Clinical Emergency Hospital, 700111 Iași, Romania
| | - Dragomir N. Șerban
- Department of Physiology, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iași, Romania
| | - Minela Aida Mărănducă
- Department of Physiology, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iași, Romania
| | - Ionela Lăcrămioara Șerban
- Department of Physiology, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iași, Romania
| | - Bogdan Ionel Tamba
- Department of Pharmacology, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iași, Romania
- Correspondence:
| | - Ionuț Tudorancea
- Cardiology Clinic, “St. Spiridon” County Clinical Emergency Hospital, 700111 Iași, Romania
- Department of Physiology, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iași, Romania
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7
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Kawano K, Shinohara T, Kondo H, Ishii Y, Takahashi M, Mitarai K, Hirota K, Fukui A, Akioka H, Teshima Y, Yufu K, Nakagawa M, Takahashi N. Risk stratification of ventricular fibrillation in patients with symptomatic Brugada syndrome using pharmacological tests. J Cardiovasc Electrophysiol 2023; 34:180-188. [PMID: 36352766 DOI: 10.1111/jce.15746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 10/11/2022] [Accepted: 11/04/2022] [Indexed: 11/11/2022]
Abstract
BACKGROUND Brugada syndrome (BrS), which is characterized by J-point elevation in right precordial leads of a 12-lead electrocardiogram, is associated with the occurrence of ventricular fibrillation (VF). However, risk stratification of VF in patients with BrS remains challenging. OBJECTIVE The aim of this study was to identify a risk predictor of VF in patients with BrS using pharmacological tests. METHODS Twenty-one consecutive patients with BrS and a history of documented spontaneous VF (n = 16) or syncope presumed to be caused by lethal ventricular arrhythmia (n = 5) were enrolled. J-wave changes in response to intravenous verapamil, propranolol, and pilsicainide were separately assessed. RESULTS During the median follow-up period of 86.0 months, 8 patients had VF recurrence (recurrence group) and 13 patients did not have VF recurrence (non-recurrence group). Intravenous propranolol injection induced significant J-wave augmentation (i.e., increase in amplitude >0.1 mV) in the inferior and/or lateral leads in the recurrence group compared to the non-recurrence group (p = .048 and p = .015, respectively). Kaplan-Meier analysis revealed that VF recurrence is significantly higher in patients with BrS and J-wave augmentation due to intravenous propranolol than in patients without J-wave augmentation (p = .014). CONCLUSION The study results show that propranolol-induced J-wave augmentation is involved in the risk of VF in patients with BrS. The results suggest that early repolarization patterns in response to pharmacological tests may be useful for risk stratification of VF in patients with symptomatic BrS.
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Affiliation(s)
- Kyoko Kawano
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Oita, Japan
| | - Tetsuji Shinohara
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Oita, Japan
| | - Hidekazu Kondo
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Oita, Japan
| | - Yumi Ishii
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Oita, Japan
| | - Masaki Takahashi
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Oita, Japan
| | - Kazuki Mitarai
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Oita, Japan
| | - Kei Hirota
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Oita, Japan
| | - Akira Fukui
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Oita, Japan
| | - Hidefumi Akioka
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Oita, Japan
| | - Yasushi Teshima
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Oita, Japan
| | - Kunio Yufu
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Oita, Japan
| | - Mikiko Nakagawa
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Oita, Japan
| | - Naohiko Takahashi
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Oita, Japan
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8
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Ensam B, Cheung CC, Almehmadi F, Gregers Winkel B, Scrocco C, Brennan P, Leong K, Muir A, Vanarva A, Tfelt-Hansen J, Roberts JD, Krahn AD, Behr ER. The Utility of Sodium Channel Provocation in Unexplained Cardiac Arrest Survivors and Electrocardiographic Predictors of Ventricular Fibrillation Recurrence. Circ Arrhythm Electrophysiol 2022; 15:e011263. [PMID: 36441561 PMCID: PMC10289235 DOI: 10.1161/circep.122.011263] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Accepted: 11/10/2022] [Indexed: 11/29/2022]
Abstract
BACKGROUND The implications of a drug-induced type 1 Brugada ECG pattern following sodium channel blocker provocation (SCBP) are not fully understood. METHODS Baseline clinical and ECG data were obtained from consecutive unexplained cardiac arrest survivors undergoing SCBP at 3 centers. A further 15 SCBP positive (SCBP+) unexplained cardiac arrest survivors were recruited from 3 additional centers to explore ventricular fibrillation recurrence. RESULTS A total of 121 consecutive unexplained cardiac arrest survivors underwent SCBP. The yield of the drug-induced type 1 Brugada ECG pattern was 17%. A baseline type 2/3 Brugada pattern (T2/3BP) (adjusted odds ratio, 19.36 [2.74-136.61]; P=0.003) and PR interval (odds ratio, 1.03 [1.01-1.05] per ms; P=0.017) were independent predictors of SCBP+ response. A pathogenic SCN5A variant was identified in 36% of the SCBP+ group versus 0% in the SCBP- group (P<0.001). Amongst SCBP+ patients, a spontaneous type 1 Brugada pattern was identified in 19% during follow up and in 24% a type 1 Brugada pattern was identified in a relative. Prior syncope (adjusted hazard ratio, 3.83 [1.36-10.78]; P=0.011) and the presence of global early repolarization (hazard ratio, 7.91 [3.22-19.44]; P<0.001) were independent predictors of 5-year ventricular fibrillation recurrence. There was a nonsignificant trend toward greater 5-year ventricular fibrillation recurrence in the SCBP- group (23/95 [24%] versus 3/34 [9%]; P=0.055). CONCLUSIONS The yield of the drug-induced type 1 Brugada ECG pattern in consecutive unexplained cardiac arrest survivors undergoing SCBP is 17%. A baseline T2/3BP and PR interval were independent predictors of the drug-induced type 1 Brugada ECG pattern. Greater heritability of BrS phenotype in this group was evidenced by a greater prevalence of pathogenic SCN5A variants and relatives with a type 1 Brugada pattern. A history of prior syncope and the presence of global early repolarization were independent predictors of ventricular fibrillation recurrence.
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Affiliation(s)
- Bode Ensam
- Cardiology Clinical Academic Group, St George’s University Hospitals NHS Foundation Trust, London, United Kingdom (B.E., C.S., E.R.B.)
- Institute of Molecular and Clinical Sciences, St George’s University of London, United Kingdom (B.E., C.S., E.R.B.)
| | - Christopher C. Cheung
- Center for Cardiovascular Innovation, Division of Cardiology, University of British Columbia, Vancouver (C.C.C., A.D.K.)
| | - Fahad Almehmadi
- Section of Cardiac Electrophysiology, Division of Cardiology, Department of Medicine, Western University, London, Ontario, Canada (F.A., J.D.R.)
| | - Bo Gregers Winkel
- Department of Cardiology, Rigshospitalet, Copenhagen, Denmark (B.G.W., J.T.-H.)
| | - Chiara Scrocco
- Cardiology Clinical Academic Group, St George’s University Hospitals NHS Foundation Trust, London, United Kingdom (B.E., C.S., E.R.B.)
- Institute of Molecular and Clinical Sciences, St George’s University of London, United Kingdom (B.E., C.S., E.R.B.)
| | - Paul Brennan
- Royal Victoria Hospital, Belfast, United Kingdom (P.B., A.M.)
| | - Kevin Leong
- Imperial College Healthcare NHS Trust, London, United Kingdom (K.L., A.V.)
| | - Alison Muir
- Royal Victoria Hospital, Belfast, United Kingdom (P.B., A.M.)
| | - Amanda Vanarva
- Imperial College Healthcare NHS Trust, London, United Kingdom (K.L., A.V.)
| | - Jacob Tfelt-Hansen
- Department of Cardiology, Rigshospitalet, Copenhagen, Denmark (B.G.W., J.T.-H.)
- Section of Forensic Genetics, Department of Forensic Medicine, Copenhagen University, Denmark (J.T.-H.)
| | - Jason D. Roberts
- Section of Cardiac Electrophysiology, Division of Cardiology, Department of Medicine, Western University, London, Ontario, Canada (F.A., J.D.R.)
| | - Andrew D. Krahn
- Center for Cardiovascular Innovation, Division of Cardiology, University of British Columbia, Vancouver (C.C.C., A.D.K.)
| | - Elijah R. Behr
- Cardiology Clinical Academic Group, St George’s University Hospitals NHS Foundation Trust, London, United Kingdom (B.E., C.S., E.R.B.)
- Institute of Molecular and Clinical Sciences, St George’s University of London, United Kingdom (B.E., C.S., E.R.B.)
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9
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Chokesuwattanaskul R, Nademanee K. Advances in Ventricular Arrhythmia Ablation for Brugada Syndrome. Card Electrophysiol Clin 2022; 14:685-692. [PMID: 36396185 DOI: 10.1016/j.ccep.2022.08.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Three decades have passed since the Brugada syndrome (BrS) clinical entity was introduced in the early 1990s. During the first 2 decades, treatment of patients with BrS was challenging because there were limited treatment options, and an implantable cardioverter-defibrillator was the only choice for high-risk patients with BrS, that is, those who had aborted sudden cardiac death or had previous ventricular fibrillation episodes. In this article, the authors focus on these advances and how to treat patients with BrS with catheter ablation.
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Affiliation(s)
- Ronpichai Chokesuwattanaskul
- Department of Medicine, Center of Excellence in Arrhythmia Research Chulalongkorn University, 1873 Rama IV Road, Pathumwan, Bangkok 10330 Thailand
| | - Koonlawee Nademanee
- Department of Medicine, Center of Excellence in Arrhythmia Research Chulalongkorn University, 1873 Rama IV Road, Pathumwan, Bangkok 10330 Thailand; Bumrungrad Hospital, Bangkok and Pacific Rim Electrophysiology Research Institute, Bangkok, Thailand; Las Vegas, NV, USA.
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10
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Di Resta C, Berg J, Villatore A, Maia M, Pili G, Fioravanti F, Tomaiuolo R, Sala S, Benedetti S, Peretto G. Concealed Substrates in Brugada Syndrome: Isolated Channelopathy or Associated Cardiomyopathy? Genes (Basel) 2022; 13:1755. [PMID: 36292641 PMCID: PMC9602309 DOI: 10.3390/genes13101755] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2022] [Revised: 09/20/2022] [Accepted: 09/23/2022] [Indexed: 09/07/2024] Open
Abstract
Brugada syndrome (BrS) is an inherited autosomal dominant genetic disorder responsible for sudden cardiac death from malignant ventricular arrhythmia. The term "channelopathy" is nowadays used to classify BrS as a purely electrical disease, mainly occurring secondarily to loss-of-function mutations in the α subunit of the cardiac sodium channel protein Nav1.5. In this setting, arrhythmic manifestations of the disease have been reported in the absence of any apparent structural heart disease or cardiomyopathy. Over the last few years, however, a consistent amount of evidence has grown in support of myocardial structural and functional abnormalities in patients with BrS. In detail, abnormal ventricular dimensions, either systolic or diastolic dysfunctions, regional wall motion abnormalities, myocardial fibrosis, and active inflammatory foci have been frequently described, pointing to alternative mechanisms of arrhythmogenesis which challenge the definition of channelopathy. The present review aims to depict the status of the art of concealed arrhythmogenic substrates in BrS, often resulting from an advanced and multimodal diagnostic workup, to foster future preclinical and clinical research in support of the cardiomyopathic nature of the disease.
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Affiliation(s)
- Chiara Di Resta
- Genomic Unit for the Diagnosis of Human Pathologies, IRCCS San Raffaele Scientific Institute, 20132 Milan, Italy
- School of Medicine, Vita-Salute San Raffaele University, 20132 Milan, Italy
| | - Jan Berg
- Department of Cardiac Electrophysiology and Arrhythmology, IRCCS San Raffaele Scientific Institute, 20132 Milan, Italy
| | - Andrea Villatore
- School of Medicine, Vita-Salute San Raffaele University, 20132 Milan, Italy
- Department of Cardiac Electrophysiology and Arrhythmology, IRCCS San Raffaele Scientific Institute, 20132 Milan, Italy
| | - Marianna Maia
- School of Medicine, Vita-Salute San Raffaele University, 20132 Milan, Italy
- Department of Cardiac Electrophysiology and Arrhythmology, IRCCS San Raffaele Scientific Institute, 20132 Milan, Italy
| | - Gianluca Pili
- School of Medicine, Vita-Salute San Raffaele University, 20132 Milan, Italy
- Department of Cardiac Electrophysiology and Arrhythmology, IRCCS San Raffaele Scientific Institute, 20132 Milan, Italy
| | - Francesco Fioravanti
- Department of Cardiac Electrophysiology and Arrhythmology, IRCCS San Raffaele Scientific Institute, 20132 Milan, Italy
| | - Rossella Tomaiuolo
- School of Medicine, Vita-Salute San Raffaele University, 20132 Milan, Italy
| | - Simone Sala
- Department of Cardiac Electrophysiology and Arrhythmology, IRCCS San Raffaele Scientific Institute, 20132 Milan, Italy
| | - Sara Benedetti
- UOC Screening Neonatale e Malattie Metaboliche, ASST Fatebenefratelli Sacco Ospedale dei Bambini “Vittore Buzzi”, 20157 Milan, Italy
| | - Giovanni Peretto
- School of Medicine, Vita-Salute San Raffaele University, 20132 Milan, Italy
- Department of Cardiac Electrophysiology and Arrhythmology, IRCCS San Raffaele Scientific Institute, 20132 Milan, Italy
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11
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Risk stratification of sudden cardiac death in Brugada syndrome: an updated review of literature. Egypt Heart J 2022; 74:25. [PMID: 35404008 PMCID: PMC9001772 DOI: 10.1186/s43044-022-00267-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Accepted: 04/05/2022] [Indexed: 11/16/2022] Open
Abstract
Brugada syndrome is a rare but serious inherited heart disease that causes sudden cardiac death by polymorphic ventricular tachycardia or ventricular fibrillation. It is an autosomal dominant genetic disease that usually occurs in patients in their forties with a structurally normal heart. Electrically, it manifests by ST elevation segment ≥ 2 mm of at least one right precordial lead (V1 and/or V2). Stratification of sudden cardiac death in Brugada syndrome is not always easy and constitutes a real challenge for the practitioner. In this review, we will present the current state of knowledge for arrhythmic risk stratification and the prevention of sudden cardiac death that can result from this syndrome.
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12
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Krahn AD, Behr ER, Hamilton R, Probst V, Laksman Z, Han HC. Brugada Syndrome. JACC Clin Electrophysiol 2022; 8:386-405. [PMID: 35331438 DOI: 10.1016/j.jacep.2021.12.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 12/09/2021] [Accepted: 12/15/2021] [Indexed: 12/15/2022]
Abstract
Brugada syndrome (BrS) is an "inherited" condition characterized by predisposition to syncope and cardiac arrest, predominantly during sleep. The prevalence is ∼1:2,000, and is more commonly diagnosed in young to middle-aged males, although patient sex does not appear to impact prognosis. Despite the perception of BrS being an inherited arrhythmia syndrome, most cases are not associated with a single causative gene variant. Electrocardiogram (ECG) findings support variable extent of depolarization and repolarization changes, with coved ST-segment elevation ≥2 mm and a negative T-wave in the right precordial leads. These ECG changes are often intermittent, and may be provoked by fever or sodium channel blocker challenge. Growing evidence from cardiac imaging, epicardial ablation, and pathology studies suggests the presence of an epicardial arrhythmic substrate within the right ventricular outflow tract. Risk stratification aims to identify those who are at increased risk of sudden cardiac death, with well-established factors being the presence of spontaneous ECG changes and a history of cardiac arrest or cardiogenic syncope. Current management involves conservative measures in asymptomatic patients, including fever management and drug avoidance. Symptomatic patients typically undergo implantable cardioverter defibrillator insertion, with quinidine and epicardial ablation used for patients with recurrent arrhythmia. This review summarizes our current understanding of BrS and provides clinicians with a practical approach to diagnosis and management.
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Affiliation(s)
- Andrew D Krahn
- Center for Cardiovascular Innovation, Heart Rhythm Services, Division of Cardiology, University of British Columbia, Vancouver, British Columbia, Canada.
| | - Elijah R Behr
- Cardiovascular Clinical Academic Group and Cardiology Research Centre, St. George's, University of London and St. George's University Hospitals NHS Foundation Trust, London, United Kingdom
| | - Robert Hamilton
- Department of Pediatrics (Cardiology), The Labatt Family Heart Centre and Translational Medicine, The Hospital for Sick Children & Research Institute and the University of Toronto, Toronto, Canada
| | - Vincent Probst
- Cardiologic Department and Reference Center for Hereditary Arrhythmic Diseases, Nantes University Hospital, Nantes, France
| | - Zachary Laksman
- Center for Cardiovascular Innovation, Heart Rhythm Services, Division of Cardiology, University of British Columbia, Vancouver, British Columbia, Canada
| | - Hui-Chen Han
- Center for Cardiovascular Innovation, Heart Rhythm Services, Division of Cardiology, University of British Columbia, Vancouver, British Columbia, Canada; Victorian Heart Institute, Monash University, Clayton, Victoria, Australia
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13
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Delise P, Mos L, Sciarra L, Basso C, Biffi A, Cecchi F, Colivicchi F, Corrado D, D'Andrea A, Di Cesare E, Di Lenarda A, Gervasi S, Giada F, Guiducci V, Inama G, Leoni L, Palamà Z, Patrizi G, Pelliccia A, Penco M, Robles AG, Romano S, Romeo F, Sarto P, Sarubbi B, Sinagra G, Zeppilli P. Italian Cardiological Guidelines (COCIS) for Competitive Sport Eligibility in athletes with heart disease: update 2020. J Cardiovasc Med (Hagerstown) 2021; 22:874-891. [PMID: 33882535 DOI: 10.2459/jcm.0000000000001186] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Since 1989, SIC Sport and a FMSI, in partnership with leading Italian Cardiological Scientific Associations (ANCE, ANMCO and SIC) have produced Cardiological Guidelines for Completive Sports Eligibility for athletes with heart disease (COCIS -- 1989, 1995, 2003, 2009 and 2017). The English version of the Italian Cardiological Guidelines for Competitive Sports Eligibility for athletes with heart disease was published in 2013 in this Journal. This publication is an update with respect to the document previously published in English in 2013. It includes the principal innovations that have emerged over recent years, and is divided into five main chapters: arrhythmias, ion channel disorders, congenital heart diseases, acquired valve diseases, cardiomyopathies, myocarditis and pericarditis and ischemic heart disease. Wherever no new data have been introduced with respect to the 2013 publication, please refer to the previous version. This document is intended to complement recent European and American guidelines but an important difference should be noted. The European and American guidelines indicate good practice for people engaging in physical activity at various levels, not only at the competitive level. In contrast, the COCIS guidelines refer specifically to competitive athletes in various sports including those with high cardiovascular stress. This explains why Italian guidelines are more restrictive than European and USA ones. COCIS guidelines address 'sports doctors' who, in Italy, must certify fitness to participate in competitive sports. In Italy, this certificate is essential for participating in any competition.
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Affiliation(s)
- Pietro Delise
- Division of Cardiology, Hospital 'P. Pederzoli', Peschiera del Garda, VR
| | - Lucio Mos
- San Antonio Hospital, San Daniele del Friuli, UD
| | | | - Cristina Basso
- Department of Cardiac, Thoracic and Vascular Sciences, University of Padova, Padua
| | | | - Franco Cecchi
- Referral Center for Cardiomyopathies, Careggi University Hospital, Florence
| | | | - Domenico Corrado
- Department of Cardiac, Thoracic and Vascular Sciences, University of Padova, Padua
| | - Antonello D'Andrea
- Department of Cardiothoracic Sciences, Monaldi Hospital, Second University of Naples, Naples
| | - Ernesto Di Cesare
- Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila, L'Aquila
| | | | - Salvatore Gervasi
- Sports Medicine Unit, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome
| | - Franco Giada
- Sports Medicine and Cardiovascular Rehabilitation Unit, Cardiovascular Department, PF Calvi Hospital, Noale, Venice
| | - Vincenzo Guiducci
- Interventional Cardiology Unit, S. Maria Nuova Hospital, Reggio Emilia
| | | | - Loira Leoni
- Department of Cardiac, Thoracic and Vascular Sciences, University of Padova, Padua
| | | | | | | | - Maria Penco
- Cardiology, Department of Life, Health and Environmental Sciences|, University of L'Aquila, L'Aquila
| | | | - Silvio Romano
- Cardiology, Department of Life, Health and Environmental Sciences|, University of L'Aquila, L'Aquila
| | - Francesco Romeo
- Department of Cardiology, University of Rome 'Tor Vergata', Rome
| | | | - Berardo Sarubbi
- Unit of Grown-up Congenital Heart Disease, Monaldi Hospital, Naples
| | - Gianfranco Sinagra
- Cardiovascular Department, Azienda Sanitaria Universitaria Integrata, University of Trieste (ASUITS), Trieste, Italy
| | - Paolo Zeppilli
- Sports Medicine Unit, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome
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14
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Romero D, Calvo M, Le Rolle V, Béhar N, Mabo P, Hernández A. Multivariate ensemble classification for the prediction of symptoms in patients with Brugada syndrome. Med Biol Eng Comput 2021; 60:81-94. [PMID: 34709544 DOI: 10.1007/s11517-021-02448-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 09/18/2021] [Indexed: 10/20/2022]
Abstract
Identification of asymptomatic patients at higher risk for suffering cardiac events remains controversial and challenging in Brugada syndrome (BS). In this work, we proposed an ECG-based classifier to predict BS-related symptoms, by merging the most predictive electrophysiological features derived from the ventricular depolarization and repolarization periods, along with autonomic-related markers. The initial feature space included local and dynamic ECG markers, assessed during a physical exercise test performed in 110 BS patients (25 symptomatic). Morphological, temporal and spatial properties quantifying the ECG dynamic response to exercise and recovery were considered. Our model was obtained by proposing a two-stage feature selection process that combined a resampled-based regularization approach with a wrapper model assessment for balancing, simplicity and performance. For the classification step, an ensemble was constructed by several logistic regression base classifiers, whose outputs were fused using a performance-based weighted average. The most relevant predictors corresponded to the repolarization interval, followed by two autonomic markers and two other makers of depolarization dynamics. Our classifier allowed for the identification of novel symptom-related markers from autonomic and dynamic ECG responses during exercise testing, suggesting the need for multifactorial risk stratification approaches in order to predict future cardiac events in asymptomatic BS patients. Graphical abstract Pipeline for feature selection and predictive modeling of symptoms in Brugada syndrome.
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Affiliation(s)
- Daniel Romero
- Institute for Bioengineering of Catalonia (IBEC), Campus Besòs EEBE-UPC, Ave. E. Maristany 16, Building C, L5.3, Barcelona, E-08019, Spain
| | - Mireia Calvo
- Institute for Bioengineering of Catalonia (IBEC), Campus Besòs EEBE-UPC, Ave. E. Maristany 16, Building C, L5.3, Barcelona, E-08019, Spain
| | - Virginie Le Rolle
- CHU Rennes, Inserm, University of Rennes, LTSI - UMR 1099, F-35000, Rennes, France
| | - Nathalie Béhar
- CHU Rennes, Inserm, University of Rennes, LTSI - UMR 1099, F-35000, Rennes, France
| | - Phillipe Mabo
- CHU Rennes, Inserm, University of Rennes, LTSI - UMR 1099, F-35000, Rennes, France
| | - Alfredo Hernández
- CHU Rennes, Inserm, University of Rennes, LTSI - UMR 1099, F-35000, Rennes, France.
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15
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Ueda N, Nagase S, Kataoka N, Nakajima K, Kamakura T, Wada M, Yamagata K, Ishibashi K, Inoue Y, Miyamoto K, Noda T, Aiba T, Izumi C, Noguchi T, Ohno S, Kusano K. Prevalence and characteristics of the Brugada electrocardiogram pattern in patients with arrhythmogenic right ventricular cardiomyopathy. J Arrhythm 2021; 37:1173-1183. [PMID: 34621416 PMCID: PMC8485808 DOI: 10.1002/joa3.12628] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Revised: 07/29/2021] [Accepted: 08/20/2021] [Indexed: 11/06/2022] Open
Abstract
BACKGROUND Despite distinct pathophysiology, arrhythmogenic right ventricular cardiomyopathy (ARVC) and Brugada syndrome (BrS) exhibit overlapping phenotypes. We investigated the prevalence and characteristics of the Brugada electrocardiogram (ECG) pattern in ARVC patients. METHODS A total of 114 ARVC patients fulfilling the revised Task Force Criteria were enrolled. The Brugada ECG pattern was evaluated according to the consensus report on right precordial leads, and 1141 ECGs (median, 1; interquartile range, 1-16 ECGs/patient) were analyzed. RESULTS Five patients (4%) showed a Brugada ECG pattern, which disappeared in four patients with ECGs recorded more than 2 years afterward. ARVC patients with the Brugada ECG pattern had a longer PQ interval (220 ± 62 ms vs 180 ± 35 ms, P = .02) and longer QRS duration (138 ± 25 ms vs 102 ± 23 ms, P < .001) than patients without the pattern. During follow-up (median, 11.4; interquartile range, 5.5-17.1 years), 19 ARVC patients experienced cardiac death and 29 experienced heart failure (HF) hospitalization. Kaplan-Meier analysis determined that the Brugada ECG pattern increased the risk of cardiac death and HF hospitalization (log-rank; P < .001, P < .001 respectively). The mean J-point and S-wave amplitudes of the Brugada ECG pattern were 0.29 ± 0.05 mV and 0.34 ± 0.21 mV, respectively, which were significantly lower than those of 26 age-matched BrS patients with a previous ventricular fibrillation episode (0.66 ± 0.33 mV, P < .001 and 0.67 ± 0.39 mV, P = .02 respectively). CONCLUSION The Brugada ECG pattern was infrequently encountered, was transient in ARVC patients, and was associated with a longer PQ interval, longer QRS duration, and cardiac events.
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Affiliation(s)
- Nobuhiko Ueda
- Division of Arrhythmia and Electrophysiology, Department of Cardiovascular Medicine National Cerebral and Cardiovascular Center Suita Japan
| | - Satoshi Nagase
- Department of Advanced Arrhythmia and Translational Medical Science National Cerebral and Cardiovascular Center Suita Japan
| | - Naoya Kataoka
- Second Department of Internal Medicine University of Toyama Toyama Japan
| | - Kenzaburo Nakajima
- Division of Arrhythmia and Electrophysiology, Department of Cardiovascular Medicine National Cerebral and Cardiovascular Center Suita Japan
| | - Tsukasa Kamakura
- Division of Arrhythmia and Electrophysiology, Department of Cardiovascular Medicine National Cerebral and Cardiovascular Center Suita Japan
| | - Mitsuru Wada
- Division of Arrhythmia and Electrophysiology, Department of Cardiovascular Medicine National Cerebral and Cardiovascular Center Suita Japan
| | - Kenichiro Yamagata
- Division of Arrhythmia and Electrophysiology, Department of Cardiovascular Medicine National Cerebral and Cardiovascular Center Suita Japan
| | - Kohei Ishibashi
- Division of Arrhythmia and Electrophysiology, Department of Cardiovascular Medicine National Cerebral and Cardiovascular Center Suita Japan
| | - Yuko Inoue
- Division of Arrhythmia and Electrophysiology, Department of Cardiovascular Medicine National Cerebral and Cardiovascular Center Suita Japan
| | - Koji Miyamoto
- Division of Arrhythmia and Electrophysiology, Department of Cardiovascular Medicine National Cerebral and Cardiovascular Center Suita Japan
| | - Takashi Noda
- Division of Arrhythmia and Electrophysiology, Department of Cardiovascular Medicine National Cerebral and Cardiovascular Center Suita Japan
| | - Takeshi Aiba
- Division of Arrhythmia and Electrophysiology, Department of Cardiovascular Medicine National Cerebral and Cardiovascular Center Suita Japan
| | - Chisato Izumi
- Division of Arrhythmia and Electrophysiology, Department of Cardiovascular Medicine National Cerebral and Cardiovascular Center Suita Japan
| | - Teruo Noguchi
- Division of Arrhythmia and Electrophysiology, Department of Cardiovascular Medicine National Cerebral and Cardiovascular Center Suita Japan
| | - Seiko Ohno
- Department of Bioscience and Genetics National Cerebral and Cardiovascular Center Suita Japan
| | - Kengo Kusano
- Division of Arrhythmia and Electrophysiology, Department of Cardiovascular Medicine National Cerebral and Cardiovascular Center Suita Japan
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16
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Yonezu K, Shinohara T, Sato H, Hirota K, Kondo H, Fukui A, Teshima Y, Yufu K, Nakagawa M, Takahashi N. Role of fragmented QRS and Shanghai score system in recurrence of ventricular fibrillation in patients with early repolarization syndrome. Ann Noninvasive Electrocardiol 2021; 26:e12873. [PMID: 34232529 PMCID: PMC8588366 DOI: 10.1111/anec.12873] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 05/27/2021] [Accepted: 06/08/2021] [Indexed: 01/23/2023] Open
Abstract
Background The Shanghai Score System, which weighs electrocardiogram (ECG) findings reflecting repolarization abnormalities, has been proposed for diagnosis of early repolarization syndrome (ERS). However, recent studies have suggested the involvement of depolarization abnormalities in some ERS patients. The aim of this study was to validate the Shanghai Score System in predicting the recurrence of ventricular fibrillation (VF) in ERS patients. The predictive value of fragmented QRS (fQRS) was also investigated. Methods Fifteen consecutive ERS patients (14 males, median age of 47 years) with a history of VF were retrospectively reviewed. The Shanghai Score System points were calculated, and the presence of fQRS was evaluated. Results During the median follow‐up period of 79.2 months, five patients experienced VF recurrence. In the VF recurrence group, two patients showed augmented amplitude of J waves with horizontal ST‐segment, while the other three patients had dynamic changes in J‐wave amplitude. The Shanghai Score System points in the VF recurrence group were higher than those in the VF non‐recurrence group (6.5 [range: 5.8–6.8] vs. 4.5 [range: 4.0–4.5], p = 0.002). The presence of fQRS on standard 12‐lead ECG was more frequently observed in the VF recurrence group compared with the non‐recurrence group (100% vs. 10%, p = 0.002). Conclusions The present study demonstrated that the Shanghai Score System could effectively identify ERS patients at high risk for VF recurrence. The results also suggested that the presence of fQRS, a marker of depolarization abnormalities, may be useful for predicting VF recurrence in ERS patients.
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Affiliation(s)
- Keisuke Yonezu
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Oita, Japan
| | - Tetsuji Shinohara
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Oita, Japan
| | - Hiroki Sato
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Oita, Japan
| | - Kei Hirota
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Oita, Japan
| | - Hidekazu Kondo
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Oita, Japan
| | - Akira Fukui
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Oita, Japan
| | - Yasushi Teshima
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Oita, Japan
| | - Kunio Yufu
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Oita, Japan
| | - Mikiko Nakagawa
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Oita, Japan
| | - Naohiko Takahashi
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Oita, Japan
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17
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Asada S, Morita H, Watanabe A, Nakagawa K, Nagase S, Miyamoto M, Morimoto Y, Kawada S, Nishii N, Ito H. Indication and prognostic significance of programmed ventricular stimulation in asymptomatic patients with Brugada syndrome. Europace 2021; 22:972-979. [PMID: 32167564 DOI: 10.1093/europace/euaa003] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Accepted: 01/09/2020] [Indexed: 12/14/2022] Open
Abstract
AIMS To establish the indication for programmed ventricular stimulation (PVS) for asymptomatic patients with Brugada syndrome (BrS), we evaluated the prognostic significance of PVS based on abnormal electrocardiogram (ECG) markers. METHODS AND RESULTS One hundred and twenty-five asymptomatic patients with BrS were included. We performed PVS at two sites of the right ventricle with up to three extrastimuli [two pacing cycle lengths and minimum coupling interval (MCI) of 180 ms]. We followed the patients for 133 months and evaluated ventricular fibrillation (VF) events. Fragmented QRS (fQRS) and Tpeak-Tend (Tpe) interval were evaluated as ECG markers for identifying high-risk patients. Fragmented QRS and long Tpe interval (≥100 ms) were observed in 66 and 37 patients, respectively. Ventricular fibrillation was induced by PVS in 60 patients. During follow-up, 10 patients experienced VF events. Fragmented QRS, long Tpe interval, and PVS-induced VF with an MCI of 180 ms or up to two extrastimuli were associated with future VF events (fQRS: P = 0.015, Tpe ≥ 100 ms: P = 0.038, VF induction: P < 0.001). However, PVS-induced VF with an MCI of 200 ms was less specific (P = 0.049). The frequencies of ventricular tachyarrhythmia events during follow-up were 0%/year with no ECG markers and 0.1%/year with no VF induction. The existence of two ECG factors with induced VF was strongly associated with future VF events (event rate: 4.4%/year, P < 0.001), and the existence of one ECG factor with induced VF was also associated (event rate: 1.3%/year, P = 0.011). CONCLUSION We propose PVS with a strict protocol for asymptomatic patients with fQRS and/or long Tpe interval to identify high-risk patients.
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Affiliation(s)
- Saori Asada
- Department of Cardiovascular Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8558, Japan
| | - Hiroshi Morita
- Department of Cardiovascular Therapeutics, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-Cho, Okayama 700-8558, Japan
| | - Atsuyuki Watanabe
- Department of Cardiovascular Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8558, Japan
| | - Koji Nakagawa
- Department of Cardiovascular Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8558, Japan
| | - Satoshi Nagase
- Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center, Osaka 565-0873, Japan
| | - Masakazu Miyamoto
- Department of Cardiovascular Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8558, Japan
| | - Yoshimasa Morimoto
- Department of Cardiovascular Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8558, Japan
| | - Satoshi Kawada
- Department of Cardiovascular Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8558, Japan
| | - Nobuhiro Nishii
- Department of Cardiovascular Therapeutics, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-Cho, Okayama 700-8558, Japan
| | - Hiroshi Ito
- Department of Cardiovascular Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8558, Japan
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18
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Lee S, Wong WT, Wong ICK, Mak C, Mok NS, Liu T, Tse G. Ventricular Tachyarrhythmia Risk in Paediatric/Young vs. Adult Brugada Syndrome Patients: A Territory-Wide Study. Front Cardiovasc Med 2021; 8:671666. [PMID: 34179137 PMCID: PMC8225934 DOI: 10.3389/fcvm.2021.671666] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Accepted: 05/18/2021] [Indexed: 12/22/2022] Open
Abstract
Introduction: Brugada syndrome (BrS) is a cardiac ion channelopathy with a higher prevalence in Asia compared to the Western populations. The present study compared the differences in clinical and electrocardiographic (ECG) presentation between paediatric/young (≤25 years old) and adult (>25 years) BrS patients. Method: This was a territory-wide retrospective cohort study of consecutive BrS patients presenting to public hospitals in Hong Kong. The primary outcome was spontaneous ventricular tachycardia/ventricular fibrillation (VT/VF). Results: The cohort consists of 550 consecutive patients (median age of initial presentation = 51 ± 23 years; female = 7.3%; follow-up period = 83 ± 80 months), divided into adult (n = 505, mean age of initial presentation = 52 ± 19 years; female = 6.7%; mean follow-up period = 83 ± 80 months) and paediatric/young subgroups (n = 45, mean age of initial presentation = 21 ± 5 years, female = 13.3%, mean follow-up period = 73 ± 83 months). The mean annual VT/VF incidence rate were 17 and 25 cases per 1,000 patient-year, respectively. Multivariate analysis showed that initial presentation of type 1 pattern (HR = 1.80, 95% CI = [1.02, 3.15], p = 0.041), initial asymptomatic presentation (HR = 0.26, 95% CI = [0.07, 0.94], p = 0.040) and increased P-wave axis (HR = 0.98, 95% CI = [0.96, 1.00], p = 0.036) were significant predictors of VT/VF for the adult subgroup. Only initial presentation of VT/VF was predictive (HR = 29.30, 95% CI = [1.75, 492.00], p = 0.019) in the paediatric/young subgroup. Conclusion: Clinical and ECG presentation of BrS vary between the paediatric/young and adult population in BrS. Risk stratification and management strategies for younger patients should take into consideration and adopt an individualised approach.
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Affiliation(s)
- Sharen Lee
- Cardiovascular Analytics Group, Laboratory of Cardiovascular Physiology, Hong Kong, China
| | - Wing Tak Wong
- State Key Laboratory of Agrobiotechnology (CUHK), School of Life Sciences, Chinese University of Hong Kong, Hong Kong, China
| | - Ian Chi Kei Wong
- Centre for Safe Medication Practice and Research, Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China.,School of Pharmacy, University College London, London, United Kingdom
| | - Chloe Mak
- Department of Pathology, Hong Kong Children's Hospital, Hong Kong, China
| | - Ngai Shing Mok
- Department of Medicine and Geriatrics, Princess Margaret Hospital, Hong Kong, China
| | - Tong Liu
- Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular Disease, Department of Cardiology, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin, China
| | - Gary Tse
- Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular Disease, Department of Cardiology, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin, China.,Faculty of Health and Medical Sciences, University of Surrey, Guildford, United Kingdom.,Kent and Medway Medical School, Canterbury, United Kingdom
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Rattanawong P, Kewcharoen J, Kanitsoraphan C, Barry T, Shanbhag A, Ko Ko NL, Vutthikraivit W, Home M, Agasthi P, Ashraf H, Shimizu W, Shen WK. Does the Age of Sudden Cardiac Death in Family Members Matter in Brugada Syndrome? J Am Heart Assoc 2021; 10:e019788. [PMID: 34013737 PMCID: PMC8483509 DOI: 10.1161/jaha.120.019788] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Background Brugada syndrome is an inherited cardiac channelopathy associated with major arrhythmic events (MAEs). The presence of a positive family history of sudden cardiac death (SCD) as a risk predictor of MAE remains controversial. We aimed to examine the association between family history of SCD and MAEs stratified by age of SCD with a systematic review and meta-analysis. Methods and Results We searched the databases of MEDLINE and EMBASE from January 1992 to January 2020. Data from each study were combined using the random-effects model. Fitted metaregression was performed to evaluate the association between the age of SCD in families and the risk of MAE. Twenty-two studies from 2004 to 2019 were included in this meta-analysis involving 3386 patients with Brugada syndrome. The overall family history of SCD was not associated with increased risk of MAE in Brugada syndrome (pooled odds ratio [OR], 1.11; 95% CI, 0.82-1.51; P=0.489, I2=45.0%). However, a history of SCD in family members of age younger than 40 years of age did increase the risk of MAE by ≈2-fold (pooled OR, 2.03; 95% CI, 1.11-3.73; P=0.022, I2=0.0%). When stratified by the age of cut point at 50, 45, 40, and 35 years old, a history of SCD in younger family member was significantly associated with a higher risk of MAE (pooled OR, 0.49, 1.30, 1.51, and 2.97, respectively; P=0.046). Conclusions A history of SCD among family members of age younger than 40 years was associated with a higher risk of MAE.
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Affiliation(s)
- Pattara Rattanawong
- Department of Cardiovascular Medicine Mayo Clinic Phoenix AZ.,Faculty of Medicine Ramathibodi Hospital Mahidol University Bangkok Thailand
| | - Jakrin Kewcharoen
- University of Hawaii Internal Medicine Residency Program Honolulu HI
| | | | - Timothy Barry
- Department of Cardiovascular Medicine Mayo Clinic Phoenix AZ
| | - Anusha Shanbhag
- Department of Cardiovascular Medicine Mayo Clinic Phoenix AZ
| | - Nway L Ko Ko
- Department of Cardiovascular Medicine Mayo Clinic Phoenix AZ
| | - Wasawat Vutthikraivit
- Division of Cardiovascular Medicine Department of Internal Medicine University of Iowa IA
| | | | | | - Hasan Ashraf
- Department of Cardiovascular Medicine Mayo Clinic Phoenix AZ
| | - Wataru Shimizu
- Department of Cardiovascular Medicine Graduate School of Medicine Nippon Medical School Tokyo Japan
| | - Win-Kuang Shen
- Department of Cardiovascular Medicine Mayo Clinic Phoenix AZ
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Chokesuwattanaskul R, Nademanee K. Role of Catheter Ablation for Ventricular Arrhythmias in Brugada Syndrome. Curr Cardiol Rep 2021; 23:54. [PMID: 33893882 PMCID: PMC8068636 DOI: 10.1007/s11886-021-01479-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 02/17/2021] [Indexed: 11/02/2022]
Abstract
PURPOSE OF REVIEW To discuss the role of catheter ablation in treating life-threatening ventricular arrhythmias associated with Brugada syndrome (BrS), by presenting recent findings of BrS arrhythmogenic substrate, mechanisms underlying ventricular arrhythmias, and how they can be treated with catheter ablation. RECENT FINDINGS Almost three decades ago when the clinical entity of Brugada syndrome (BrS) was described in patients who had abnormal coved-type ST elevation in the right precordial EKG leads in patients who had no apparent structural heart disease but died suddenly from ventricular fibrillation. Since its description, the syndrome has galvanized explosive research in this field over the past decades, driving major progress toward better understanding of BrS, gaining knowledge of the genetic pathophysiology and risk stratification of BrS, and creating significant advances in therapeutic modalities. One of such advances is the ability for electrophysiologists to map and identify the arrhythmogenic substrate sites of BrS, which serve as good target sites for catheter ablation. Subsequently, several studies have shown that catheter ablation of these substrates normalizes the Brugada ECG pattern and is very effective in eliminating these substrates and preventing recurrent VF episodes. Catheter ablation has become an important addition for treatment of symptomatic BrS patients with recurrent VT/VF episodes.
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Affiliation(s)
- Ronpichai Chokesuwattanaskul
- Faculty of Medicine, Division of Cardiovascular Medicine, King Chulalongkorn Memorial Hospital, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Koonlawee Nademanee
- Faculty of Medicine, Division of Cardiovascular Medicine, King Chulalongkorn Memorial Hospital, Chulalongkorn University, Bangkok, 10330, Thailand. .,Bumrungrad Hospital, Bangkok, Thailand. .,Pacific Rim Electrophysiology Research Institute, Bangkok, Thailand. .,Pacific Rim Electrophysiology Research Institute, Las Vegas, Nevada, USA.
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21
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Lopez-Blazquez M, Field E, Tollit J, Walsh H, Addis A, French N, Starling L, Kaski JP. Clinical significance of inferolateral early repolarisation and late potentials in children with Brugada Syndrome. J Electrocardiol 2021; 66:79-83. [PMID: 33831794 DOI: 10.1016/j.jelectrocard.2021.03.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 03/23/2021] [Accepted: 03/26/2021] [Indexed: 11/30/2022]
Abstract
INTRODUCTION The clinical utility of inferolateral early repolarisation (ER) and late potentials (LP) in children with Brugada Syndrome (BrS) has not been previously evaluated. The aim of this study was to determine the prevalence of electrocardiographic (ECG) abnormalities in children with BrS, and to investigate their relationship with clinical outcomes. METHODS 43 patients with BrS and 47 controls aged ≤18 undergoing systematic clinical and ECG evaluation, including signal-averaged ECG (SAECG) and pharmacological provocation testing, between 2003 and 2019 were included. RESULTS Four patients with BrS (9%) presented with a spontaneous type 1 Brugada pattern; the remaining 39 (91%) were diagnosed following ajmaline provocation testing. Twelve BrS patients (28%) had late potentials (LP) on SAECG compared to 1 (2%) in controls (p = 0.001). LP were more common in 5 patients with a high-risk phenotype (60% vs 24%) but this was not statistically significant. Twelve patients with BrS (28%) had inferolateral early repolarisation (ER) and 2 (5%) had fractionated QRS (f-QRS), but there were no statistically-significant differences with controls in these parameters. A significant arrhythmia (non-sustained ventricular tachycardia or atrial fibrillation) was seen in 4 patients (9%). CONCLUSIONS This study shows a high prevalence of SAECG abnormalities in children with BrS compared with controls, but this was not significantly associated with a high-risk phenotype.
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Affiliation(s)
- Maria Lopez-Blazquez
- Centre for Inherited Cardiovascular Diseases, Great Ormond Street Hospital for Children NHS Foundation Trust, London, United Kingdom; Gregorio Marañon Children Hospital, Madrid, Spain
| | - Ella Field
- Centre for Inherited Cardiovascular Diseases, Great Ormond Street Hospital for Children NHS Foundation Trust, London, United Kingdom
| | - Jennifer Tollit
- Centre for Inherited Cardiovascular Diseases, Great Ormond Street Hospital for Children NHS Foundation Trust, London, United Kingdom
| | - Helen Walsh
- Centre for Inherited Cardiovascular Diseases, Great Ormond Street Hospital for Children NHS Foundation Trust, London, United Kingdom
| | - Amy Addis
- Centre for Inherited Cardiovascular Diseases, Great Ormond Street Hospital for Children NHS Foundation Trust, London, United Kingdom
| | - Nichola French
- Centre for Inherited Cardiovascular Diseases, Great Ormond Street Hospital for Children NHS Foundation Trust, London, United Kingdom
| | - Luke Starling
- Centre for Inherited Cardiovascular Diseases, Great Ormond Street Hospital for Children NHS Foundation Trust, London, United Kingdom
| | - Juan Pablo Kaski
- Centre for Inherited Cardiovascular Diseases, Great Ormond Street Hospital for Children NHS Foundation Trust, London, United Kingdom; UCL Institute of Cardiovascular Science, London, United Kingdom.
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22
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Ishizue N, Niwano S, Fukaya H, Oikawa J, Kishihara J, Ako J. Day-to-Day Variation of Early Repolarization Pattern Predicts Life-Threatening Arrhythmias in Patients With Brugada Syndrome. Circ J 2021; 85:300-308. [PMID: 33191390 DOI: 10.1253/circj.cj-20-0142] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
BACKGROUND We assessed the relationship between day-to-day variation of the early repolarization (ER) pattern and ventricular tachyarrhythmia (VTA) events in Brugada syndrome (BrS) patients because the clinical implications are unclear.Methods and Results:This retrospective study consisted of 41 patients with BrS who underwent implantable cardioverter-defibrillator (ICD) implantation. BrS was diagnosed by a spontaneous or drug-induced type 1 ECG without structural heart disease. Day-to-day variation of the ER pattern was defined as temporal change in the J-point (≥0.1 mV) on ECG. VTA events were detected via ICD interrogation: 15 patients experienced VTA events during 124±62 months' observation. Day-to-day variation of the ER pattern was positive in 7 patients (17%). In the multivariate Cox proportional hazards model, day-to-day variation of a positive ER pattern (hazard ratio [HR]: 3.475, 95% confidence interval [CI]: 1.105-10.414, P=0.034) and documented history of VTA (HR: 4.802, 95% CI: 1.547-17.995, P=0.006) were independent predictors of VTA events. In patients with electrical storm (ES: n=9), day-to-day variation of the ER pattern was positive in 5 patients (56%). ES events were more frequently observed in patients with a positive day-to-day variation of ER pattern than in those without (P<0.05). CONCLUSIONS The incidence of day-to-day variation of the ER pattern was higher in patients with arrhythmic events of VTA and/or ES among BrS patients with ICD.
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Affiliation(s)
- Naruya Ishizue
- Department of Cardiovascular Medicine, Kitasato University School of Medicine
| | - Shinichi Niwano
- Department of Cardiovascular Medicine, Kitasato University School of Medicine
| | - Hidehira Fukaya
- Department of Cardiovascular Medicine, Kitasato University School of Medicine
| | - Jun Oikawa
- Department of Cardiovascular Medicine, Kitasato University School of Medicine
| | - Jun Kishihara
- Department of Cardiovascular Medicine, Kitasato University School of Medicine
| | - Junya Ako
- Department of Cardiovascular Medicine, Kitasato University School of Medicine
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Lee S, Zhou J, Li KHC, Leung KSK, Lakhani I, Liu T, Wong ICK, Mok NS, Mak C, Jeevaratnam K, Zhang Q, Tse G. Territory-wide cohort study of Brugada syndrome in Hong Kong: predictors of long-term outcomes using random survival forests and non-negative matrix factorisation. Open Heart 2021; 8:e001505. [PMID: 33547222 PMCID: PMC7871343 DOI: 10.1136/openhrt-2020-001505] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 01/14/2021] [Accepted: 01/15/2021] [Indexed: 12/13/2022] Open
Abstract
OBJECTIVES Brugada syndrome (BrS) is an ion channelopathy that predisposes affected patients to spontaneous ventricular tachycardia/fibrillation (VT/VF) and sudden cardiac death. The aim of this study is to examine the predictive factors of spontaneous VT/VF. METHODS This was a territory-wide retrospective cohort study of patients diagnosed with BrS between 1997 and 2019. The primary outcome was spontaneous VT/VF. Cox regression was used to identify significant risk predictors. Non-linear interactions between variables (latent patterns) were extracted using non-negative matrix factorisation (NMF) and used as inputs into the random survival forest (RSF) model. RESULTS This study included 516 consecutive BrS patients (mean age of initial presentation=50±16 years, male=92%) with a median follow-up of 86 (IQR: 45-118) months. The cohort was divided into subgroups based on initial disease manifestation: asymptomatic (n=314), syncope (n=159) or VT/VF (n=41). Annualised event rates per person-year were 1.70%, 0.05% and 0.01% for the VT/VF, syncope and asymptomatic subgroups, respectively. Multivariate Cox regression analysis revealed initial presentation of VT/VF (HR=24.0, 95% CI=1.21 to 479, p=0.037) and SD of P-wave duration (HR=1.07, 95% CI=1.00 to 1.13, p=0.044) were significant predictors. The NMF-RSF showed the best predictive performance compared with RSF and Cox regression models (precision: 0.87 vs 0.83 vs. 0.76, recall: 0.89 vs. 0.85 vs 0.73, F1-score: 0.88 vs 0.84 vs 0.74). CONCLUSIONS Clinical history, electrocardiographic markers and investigation results provide important information for risk stratification. Machine learning techniques using NMF and RSF significantly improves overall risk stratification performance.
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Affiliation(s)
- Sharen Lee
- Cardiovascular Analytics Group, Laboratory of Cardiovascular Physiology, Hong Kong, China
| | - Jiandong Zhou
- School of Data Science, City University of Hong Kong, Kowloon, Hong Kong
| | - Ka Hou Christien Li
- Faculty of Medicine, Newcastle University, Newcastle upon Tyne, Tyne and Wear, UK
| | | | - Ishan Lakhani
- Cardiovascular Analytics Group, Laboratory of Cardiovascular Physiology, Hong Kong, China
| | - Tong Liu
- Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular Disease, Department of Cardiology, Tianjin Institute of Cardiology, The Second Hospital of Tianjin Medical University, Tianjin, China
| | - Ian Chi Kei Wong
- Research department of Practice and Policy, University College London School of Pharmacy, London, UK
- Centre for Safe Medication Practice and Research, Department of Pharmacology and Pharmacy, The University of Hong Kong, Hong Kong, China
| | - Ngai Shing Mok
- Department of Medicine and Geriatrics, Princess Margaret Hospital, Hong Kong, Hong Kong
| | - Chloe Mak
- Department of Pathology, Hong Kong Children's Hospital, Hong Kong, Hong Kong
| | - Kamalan Jeevaratnam
- Faculty of Health and Medical Sciences, University of Surrey, Guildford, Surrey, UK
| | - Qingpeng Zhang
- School of Data Science, City University of Hong Kong, Kowloon, Hong Kong
| | - Gary Tse
- Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular Disease, Department of Cardiology, Tianjin Institute of Cardiology, The Second Hospital of Tianjin Medical University, Tianjin, China
- Faculty of Health and Medical Sciences, University of Surrey, Guildford, Surrey, UK
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24
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Tse G, Lee S, Li A, Chang D, Li G, Zhou J, Liu T, Zhang Q. Automated Electrocardiogram Analysis Identifies Novel Predictors of Ventricular Arrhythmias in Brugada Syndrome. Front Cardiovasc Med 2021; 7:618254. [PMID: 33521066 PMCID: PMC7840575 DOI: 10.3389/fcvm.2020.618254] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Accepted: 12/17/2020] [Indexed: 12/13/2022] Open
Abstract
Background: Patients suffering from Brugada syndrome (BrS) are at an increased risk of life-threatening ventricular arrhythmias. Whilst electrocardiographic (ECG) variables have been used for risk stratification with varying degrees of success, automated measurements have not been tested for their ability to predict adverse outcomes in BrS. Methods: BrS patients presenting in a single tertiary center between 2000 and 2018 were analyzed retrospectively. ECG variables on vector magnitude, axis, amplitude and duration from all 12 leads were determined. The primary endpoint was spontaneous ventricular tachycardia/ventricular fibrillation (VT/VF) on follow-up. Results: This study included 83 patients [93% male, median presenting age: 56 (41–66) years old, 45% type 1 pattern] with 12 developing the primary endpoint (median follow-up: 75 (Q1–Q3: 26–114 months). Cox regression showed that QRS frontal axis > 70.0 degrees, QRS horizontal axis > 57.5 degrees, R-wave amplitude (lead I) <0.67 mV, R-wave duration (lead III) > 50.0 ms, S-wave amplitude (lead I) < −0.144 mV, S-wave duration (lead aVL) > 35.5 ms, QRS duration (lead V3) > 96.5 ms, QRS area in lead I < 0.75 Ashman units, ST slope (lead I) > 31.5 deg, T-wave area (lead V1) < −3.05 Ashman units and PR interval (lead V2) > 157 ms were significant predictors. A weighted score based on dichotomized values provided good predictive performance (hazard ratio: 1.59, 95% confidence interval: 1.27–2.00, P-value<0.0001, area under the curve: 0.84). Conclusions: Automated ECG analysis revealed novel risk markers in BrS. These markers should be validated in larger prospective studies.
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Affiliation(s)
- Gary Tse
- Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular Disease, Department of Cardiology, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin, China
| | - Sharen Lee
- Laboratory of Cardiovascular Physiology, Faculty of Medicine, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Hong Kong, China
| | - Andrew Li
- Faculty of Science, University of Calgary, Calgary, AB, Canada
| | - Dong Chang
- Xiamen Cardiovascular Hospital, Xiamen University, Xiamen, China
| | - Guangping Li
- Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular Disease, Department of Cardiology, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin, China
| | - Jiandong Zhou
- School of Data Science, City University of Hong Kong, Hong Kong, China
| | - Tong Liu
- Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular Disease, Department of Cardiology, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin, China
| | - Qingpeng Zhang
- School of Data Science, City University of Hong Kong, Hong Kong, China
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25
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Letsas KP, Bazoukis G, Efremidis M, Georgopoulos S, Korantzopoulos P, Fragakis N, Asvestas D, Vlachos K, Saplaouras A, Sakellaropoulou A, Mililis P, Strempelas P, Giannopoulos G, Gavrielatos G, Tzeis S, Kardamis C, Katsivas A, Deftereos S, Stavrakis S, Sideris A. Clinical characteristics and long-term clinical course of patients with Brugada syndrome without previous cardiac arrest: a multiparametric risk stratification approach. Europace 2020; 21:1911-1918. [PMID: 31638693 DOI: 10.1093/europace/euz288] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2019] [Accepted: 10/04/2019] [Indexed: 12/18/2022] Open
Abstract
AIMS Risk stratification in Brugada syndrome (BrS) still represents an unsettled issue. In this multicentre study, we aimed to evaluate the clinical characteristics and the long-term clinical course of patients with BrS. METHODS AND RESULTS A total of 111 consecutive patients (86 males; aged 45.3 ± 13.3 years) diagnosed with BrS were included and followed-up in a prospective fashion. Thirty-seven patients (33.3%) were symptomatic at enrolment (arrhythmic syncope). An electrophysiological study (EPS) was performed in 59 patients (53.2%), and ventricular arrhythmias were induced in 32 (54.2%). A cardioverter defibrillator was implanted in 34 cases (30.6%). During a mean follow-up period of 4.6 ± 3.5 years, appropriate device therapies occurred in seven patients. Event-free survival analysis (log-rank test) showed that spontaneous type-1 electrocardiogram pattern (P = 0.008), symptoms at presentation (syncope) (P = 0.012), family history of sudden cardiac death (P < 0.001), positive EPS (P = 0.024), fragmented QRS (P = 0.004), and QRS duration in lead V2 > 113 ms (P < 0.001) are predictors of future arrhythmic events. Event rates were 0%, 4%, and 60% among patients with 0-1 risk factor, 2-3 risk factors, and 4-5 risk factors, respectively (P < 0.001). Current multiparametric score models exhibit an excellent negative predictive value and perform well in risk stratification of BrS patients. CONCLUSIONS Multiparametric models including common risk factors appear to provide better risk stratification of BrS patients than single factors alone.
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Affiliation(s)
- Konstantinos P Letsas
- Second Department of Cardiology, Laboratory of Invasive Cardiac Electrophysiology, "Evangelismos" General Hospital of Athens, Ispilantou 45-47, 10676, Athens, Greece
| | - George Bazoukis
- Second Department of Cardiology, Laboratory of Invasive Cardiac Electrophysiology, "Evangelismos" General Hospital of Athens, Ispilantou 45-47, 10676, Athens, Greece
| | - Michael Efremidis
- Second Department of Cardiology, Laboratory of Invasive Cardiac Electrophysiology, "Evangelismos" General Hospital of Athens, Ispilantou 45-47, 10676, Athens, Greece
| | - Stamatis Georgopoulos
- Second Department of Cardiology, Laboratory of Invasive Cardiac Electrophysiology, "Evangelismos" General Hospital of Athens, Ispilantou 45-47, 10676, Athens, Greece
| | | | - Nikolaos Fragakis
- Cardiology Unit, Second Propedeutic Department of Internal Medicine, Hippokration Hospital of Thessaloniki, Thessaloniki, Greece
| | - Dimitrios Asvestas
- Second Department of Cardiology, Laboratory of Invasive Cardiac Electrophysiology, "Evangelismos" General Hospital of Athens, Ispilantou 45-47, 10676, Athens, Greece
| | - Konstantinos Vlachos
- Second Department of Cardiology, Laboratory of Invasive Cardiac Electrophysiology, "Evangelismos" General Hospital of Athens, Ispilantou 45-47, 10676, Athens, Greece
| | - Athanasios Saplaouras
- Second Department of Cardiology, Laboratory of Invasive Cardiac Electrophysiology, "Evangelismos" General Hospital of Athens, Ispilantou 45-47, 10676, Athens, Greece
| | - Antigoni Sakellaropoulou
- Second Department of Cardiology, Laboratory of Invasive Cardiac Electrophysiology, "Evangelismos" General Hospital of Athens, Ispilantou 45-47, 10676, Athens, Greece
| | - Panagiotis Mililis
- Second Department of Cardiology, Laboratory of Invasive Cardiac Electrophysiology, "Evangelismos" General Hospital of Athens, Ispilantou 45-47, 10676, Athens, Greece
| | | | - Georgios Giannopoulos
- Department of Cardiology, "G. Gennimatas" General Hospital of Athens, Athens, Greece
| | | | - Stylianos Tzeis
- Department of Cardiology, Henry Dunant Hospital, Athens, Greece
| | | | - Apostolos Katsivas
- First Department of Cardiology, Athens Red Cross Hospital, Athens, Greece
| | - Spyridon Deftereos
- Department of Cardiology, "G. Gennimatas" General Hospital of Athens, Athens, Greece
| | - Stavros Stavrakis
- Second Department of Cardiology, Laboratory of Invasive Cardiac Electrophysiology, "Evangelismos" General Hospital of Athens, Ispilantou 45-47, 10676, Athens, Greece.,University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Antonios Sideris
- Second Department of Cardiology, Laboratory of Invasive Cardiac Electrophysiology, "Evangelismos" General Hospital of Athens, Ispilantou 45-47, 10676, Athens, Greece
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26
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Tse G, Zhou J, Lee S, Liu T, Bazoukis G, Mililis P, Wong ICK, Chen C, Xia Y, Kamakura T, Aiba T, Kusano K, Zhang Q, Letsas KP. Incorporating Latent Variables Using Nonnegative Matrix Factorization Improves Risk Stratification in Brugada Syndrome. J Am Heart Assoc 2020; 9:e012714. [PMID: 33170070 PMCID: PMC7763720 DOI: 10.1161/jaha.119.012714] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Background A combination of clinical and electrocardiographic risk factors is used for risk stratification in Brugada syndrome. In this study, we tested the hypothesis that the incorporation of latent variables between variables using nonnegative matrix factorization can improve risk stratification compared with logistic regression. Methods and Results This was a retrospective cohort study of patients presented with Brugada electrocardiographic patterns between 2000 and 2016 from Hong Kong, China. The primary outcome was spontaneous ventricular tachycardia/ventricular fibrillation. The external validation cohort included patients from 3 countries. A total of 149 patients with Brugada syndrome (84% males, median age of presentation 50 [38–61] years) were included. Compared with the nonarrhythmic group (n=117, 79%), the spontaneous ventricular tachycardia/ ventricular fibrillation group (n=32, 21%) were more likely to suffer from syncope (69% versus 37%, P=0.001) and atrial fibrillation (16% versus 4%, P=0.023) as well as displayed longer QTc intervals (424 [399–449] versus 408 [386–425]; P=0.020). No difference in QRS interval was observed (108 [98–114] versus 102 [95–110], P=0.104). Logistic regression found that syncope (odds ratio, 3.79; 95% CI, 1.64–8.74; P=0.002), atrial fibrillation (odds ratio, 4.15; 95% CI, 1.12–15.36; P=0.033), QRS duration (odds ratio, 1.03; 95% CI, 1.002–1.06; P=0.037) and QTc interval (odds ratio, 1.02; 95% CI, 1.01–1.03; P=0.009) were significant predictors of spontaneous ventricular tachycardia/ventricular fibrillation. Increasing the number of latent variables of these electrocardiographic indices incorporated from n=0 (logistic regression) to n=6 by nonnegative matrix factorization improved the area under the curve of the receiving operating characteristics curve from 0.71 to 0.80. The model improves area under the curve of external validation cohort (n=227) from 0.64 to 0.71. Conclusions Nonnegative matrix factorization improves the predictive performance of arrhythmic outcomes by extracting latent features between different variables.
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Affiliation(s)
- Gary Tse
- Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular disease Department of Cardiology Tianjin Institute of Cardiology Second Hospital of Tianjin Medical University Tianjin P.R. China.,Department of Cardiology The First Affiliated Hospital of Dalian Medical University Dalian China
| | - Jiandong Zhou
- School of Data Science City University of Hong Kong Hong Kong Hong Kong SAR People's Republic of China
| | - Sharen Lee
- Laboratory of Cardiovascular Physiology Chinese University Shenzhen Institute Shenzhen P.R. China
| | - Tong Liu
- Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular disease Department of Cardiology Tianjin Institute of Cardiology Second Hospital of Tianjin Medical University Tianjin P.R. China
| | - George Bazoukis
- Second Department of Cardiology Laboratory of Cardiac Electrophysiology Evangelismos General Hospital of Athens Athens Greece
| | - Panagiotis Mililis
- Second Department of Cardiology Laboratory of Cardiac Electrophysiology Evangelismos General Hospital of Athens Athens Greece
| | - Ian C K Wong
- School of Pharmacy University College London London UK.,Department of Pharmacology and Pharmacy University of Hong Kong Pokfulam Hong Kong
| | - Cheng Chen
- Department of Cardiology The First Affiliated Hospital of Dalian Medical University Dalian China
| | - Yunlong Xia
- Department of Cardiology The First Affiliated Hospital of Dalian Medical University Dalian China
| | | | - Takeshi Aiba
- National Cerebral and Cardiovascular Center Osaka Japan
| | - Kengo Kusano
- National Cerebral and Cardiovascular Center Osaka Japan
| | - Qingpeng Zhang
- School of Data Science City University of Hong Kong Hong Kong Hong Kong SAR People's Republic of China
| | - Konstantinos P Letsas
- Second Department of Cardiology Laboratory of Cardiac Electrophysiology Evangelismos General Hospital of Athens Athens Greece
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27
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Abela M, Sharma S. Electrocardiographic interpretation in athletes. Minerva Cardiol Angiol 2020; 69:533-556. [PMID: 33059398 DOI: 10.23736/s2724-5683.20.05331-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Participation in regular exercise of moderate intensity is associated with a plethora of systemic benefits, including a reduction in risk factors for coronary atherosclerosis; however, intensive exercise may paradoxically culminate in sudden cardiac arrest among individuals harboring arrhythmogenic substrates. The precise mechanism for arrhythmogenesis is likely multifactorial, however, surges in catecholamines, electrolyte shifts, acid-base disturbances, increased core temperature and demand myocardial ischemia are potential contributors. Although most deaths occur in middle aged and older males with atherosclerotic coronary artery disease, a significant proportion also affect young athletes with inherited or congenital cardiac abnormalities. The impact of such catastrophes on society, particularly when a young high-profile athlete is affected could be considered a justified reason for identifying individuals who may be at risk. Given the rarity of deaths in young athletes, only the simplest screening test, such as the 12-lead electrocardiography (ECG) may be considered to be cost effective. The ECG is effective for detecting serious electrical diseases in young athletes such as congenital electrical accessory pathways and ion channel diseases but can also identify athletes with potential life-threatening structural diseases such as hypertrophic and arrhythmogenic cardiomyopathy. One of the concerns about ECG screening is that regular intensive exercise results in several physiological alterations in cardiac structure and function that are reflected on the athlete's ECG. Sinus bradycardia, first-degree atrioventricular block, incomplete right bundle branch block, minor J-point elevation and large QRS voltages are common. Conversely, some repolarization anomalies affecting the ST segment, T waves and QT interval may overlap with patterns observed in patients with serious cardiac diseases. The situation is complicated further because age, sex and ethnicity of the athletes also influence the ECG and there is a risk that erroneous interpretation could have serious consequences. This review will describe the normal electrical patterns of the "athlete's heart" and provide insights into differentiation physiological electrical patterns from those observed in serious cardiac disease.
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Affiliation(s)
- Mark Abela
- Department of Cardiology, Mater Dei Hospital, Msida, Malta - .,Malta Medical School, University of Malta, Msida, Malta - .,St. George's University Hospitals, NHS Foundation Trust, St George's University, London, UK -
| | - Sanjay Sharma
- St. George's University Hospitals, NHS Foundation Trust, St George's University, London, UK
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Malik BR, Ali Rudwan AM, Abdelghani MS, Mohsen M, Khan SHA, Aljefairi N, Mahmoud E, Asaad N, Hayat SA. Brugada Syndrome: Clinical Features, Risk Stratification, and Management. Heart Views 2020; 21:88-96. [PMID: 33014301 PMCID: PMC7507903 DOI: 10.4103/heartviews.heartviews_44_20] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Accepted: 03/29/2020] [Indexed: 01/25/2023] Open
Abstract
In 1992, the Brugada brothers published a patient series of aborted sudden death, who were successfully resuscitated from ventricular fibrillation (VF). These patients had a characteristic coved ST-segment elevation in the right precordial leads on their 12-lead electrocardiogram with no apparent structural heart abnormality. This disease was referred to as “right bundle branch block, persistent ST-segment elevation, and sudden death syndrome.” The term Brugada syndrome (BrS) was first coined for this new arrhythmogenic entity in 1996. BrS is more prevalent in Southeast Asian ethnic groups and was considered a familial disease due to the presence of syncope and/or sudden deaths in several members of the same family, however, the genetic alteration was only noted in 1998. The genetic characterization of BrS has proven to be challenging. The most common and well-established BrS genotype involves loss-of-function mutations in the SCN5A gene, but only represents between 15% and 30% of the diagnosed patients. Patients with BrS can present with a range of symptoms which can include syncope, seizures, and nocturnal agonal breathing due to polymorphic ventricular tachycardia or VF. If these arrhythmias are sustained, sudden cardiac death may result. Despite the significant progress on the understanding of BrS over the last two decades, there remain a number of uncertainties and challenges; we present an update review on the subject.
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Affiliation(s)
| | | | | | - Mohammed Mohsen
- Department of Electrophysiology, Heart Hospital, Hamad Medical Corporation, Doha, Qatar
| | - Shahul Hameed A Khan
- Department of Electrophysiology, Heart Hospital, Hamad Medical Corporation, Doha, Qatar
| | - Nora Aljefairi
- Department of Electrophysiology, Heart Hospital, Hamad Medical Corporation, Doha, Qatar
| | - Elsayed Mahmoud
- Department of Electrophysiology, Heart Hospital, Hamad Medical Corporation, Doha, Qatar
| | - Nidal Asaad
- Department of Electrophysiology, Heart Hospital, Hamad Medical Corporation, Doha, Qatar
| | - Sajad Ahmed Hayat
- Department of Electrophysiology, Heart Hospital, Hamad Medical Corporation, Doha, Qatar
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29
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Romero D, Behar N, Petit B, Probst V, Sacher F, Mabo P, Hernández AI. Dynamic changes in ventricular depolarization during exercise in patients with Brugada syndrome. PLoS One 2020; 15:e0229078. [PMID: 32126115 PMCID: PMC7053736 DOI: 10.1371/journal.pone.0229078] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Accepted: 01/29/2020] [Indexed: 11/18/2022] Open
Abstract
Brugada syndrome (BS) is a genetic pathological condition associated with a high risk for sudden cardiac death (SCD). Ventricular depolarization disorders have been suggested as a potential electrophysiological mechanism associated with high SCD risk on patients with BS. This paper aims to characterize the dynamic changes of ventricular depolarization observed during physical exercise in symptomatic and asymptomatic BS patients. To this end, cardiac ventricular depolarization features were automatically extracted from 12-lead ECG recordings acquired during standardized exercise stress test in 110 BS patients, of whom 25 were symptomatic. Conventional parameters were evaluated, including QRS duration, R and S wave amplitudes ( AR, AS), as well as QRS morphological features, such as up-stroke and down-stroke slopes of the R and S waves ( UR, DR and US). The effects of physical exercise and recovery on the dynamics of these markers were assessed in both BS populations. Features showing significantly different dynamics between the studied groups were used alone and in combination with the clinical characteristics of the patients in a logistic regression analysis. Results show larger changes in the second half of the QRS complex through AS and US measured in the right precordial leads for asymptomatic patients, especially during recovery, when the vagal tone is more pronounced. Multivariate analysis involving both types of features resulted in a reduced model of three relevant features ( ΔAS in lead V2, Sex and heart rate recovery, HRR), which achieved a suitable discrimination performance between groups; sensitivity = 80% and specificity = 75% (AUC = 83%). However, after controlling the model for possible confounding factors, only one feature ( ΔAS) remained meaningful. This adjusted model significantly improved the overall discrimination performance by up to: sensitivity = 84% and specificity = 100% (AUC = 94%). The study highlights the importance of physical exercise test to unmask differentiated behaviors between symptomatic and asymptomatic BS patients through depolarization dynamic analysis. This analysis together with the obtained model may help to identify asymptomatic patients at low or high risk of future cardiac events, but it should be confirmed by further prospective studies.
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Affiliation(s)
- Daniel Romero
- Univ Rennes, CHU Rennes, Inserm, LTSI - UMR 1099, Rennes, France
| | - Nathalie Behar
- Univ Rennes, CHU Rennes, Inserm, LTSI - UMR 1099, Rennes, France
| | - Bertrand Petit
- Service Cardiologie, GH Sud. Saint Pierre La Réunion, Saint-Pierre, France
| | | | | | - Philippe Mabo
- Univ Rennes, CHU Rennes, Inserm, LTSI - UMR 1099, Rennes, France
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30
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Tian C, An N, Yuan M, Wang L, Zhang H, Li X, Yang X, Li Y, Kusano KF, Gao Y, Xing Y. A Pooled Analysis of the Prognostic Significance of Brugada Syndrome with Atrial Fibrillation. Curr Pharm Des 2020; 26:129-137. [PMID: 31942857 DOI: 10.2174/1381612826666200114112029] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Accepted: 12/31/2019] [Indexed: 12/25/2022]
Abstract
Background:
Guidelines have previously suggested that atrial fibrillation (AF) is associated with an
increased risk of arrhythmic death in Brugada syndrome (BrS) patients. However, only two articles consisting of
17 AF patients with BrS supported these views. The risk stratification of BrS patients with AF remains controversial.
Thus, a meta-analysis is used to estimate the risk stratification of BrS patients with AF.
Methods:
We searched for relevant studies published from 2000 to December 30, 2018. A total of 1712 patients
with BrS from five studies were included: 200 patients (12%) were reported with AF, among whom 37 patients
(19%) had arrhythmic events.
Results:
BrS patients with AF in all studies (OR 1.92, 95% CI:0.91to 4.04, P =0.09; Heterogeneity: P = 0.03,
I2=61%) and some European studies (OR 1.12, 95% CI: 0.18 to 6.94, P=0.91; Heterogeneity: P = 0.006, I2=80%)
did not display a higher risk of arrhythmic events than those without AF, but BrS patients with AF in Japanese
studies (OR 2.32, 95% CI: 1.37 to 3.93, P=0.002; Heterogeneity: P = 0.40, I2=0%) had a higher risk of arrhythmic
events than those without AF. The proportion of BrS patients with AF was greater in Japanese studies than in
some European studies (16% vs. 9%, P<0.001).
Conclusions:
On the whole, BrS patients with AF showed no higher risk of arrhythmic events than those without
AF, but BrS patients with AF in Japan had a higher risk of arrhythmic events than those without AF.
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Affiliation(s)
- Chao Tian
- Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, China
| | - Na An
- Key Laboratory of Chinese Internal Medicine of Ministry of Education and Beijing, Dongzhimen Hospital Affiliated to Beijing University of Chinese Medicine, Beijing, China
| | - Mengchen Yuan
- Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, China
| | - Liqin Wang
- Key Laboratory of Chinese Internal Medicine of Ministry of Education and Beijing, Dongzhimen Hospital Affiliated to Beijing University of Chinese Medicine, Beijing, China
| | - Hanlai Zhang
- Key Laboratory of Chinese Internal Medicine of Ministry of Education and Beijing, Dongzhimen Hospital Affiliated to Beijing University of Chinese Medicine, Beijing, China
| | - Xinye Li
- Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, China
| | - Xinyu Yang
- Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, China
| | - Yanda Li
- Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, China
| | - Kengo F. Kusano
- Division of Arrhythmia and Electrophysiology, Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center, Osaka, Japan
| | - Yonghong Gao
- Key Laboratory of Chinese Internal Medicine of Ministry of Education and Beijing, Dongzhimen Hospital Affiliated to Beijing University of Chinese Medicine, Beijing, China
| | - Yanwei Xing
- Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, China
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Rattanawong P, Kewcharoen J, Techorueangwiwat C, Kanitsoraphan C, Mekritthikrai R, Prasitlumkum N, Puttapiban P, Mekraksakit P, Vutthikraivit W, Sorajja D. Wide QRS complex and the risk of major arrhythmic events in Brugada syndrome patients: A systematic review and meta-analysis. J Arrhythm 2020; 36:143-152. [PMID: 32071633 PMCID: PMC7011812 DOI: 10.1002/joa3.12290] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Revised: 11/18/2019] [Accepted: 12/01/2019] [Indexed: 01/11/2023] Open
Abstract
BACKGROUND Brugada syndrome (BrS) is an inherited arrhythmic disease associated with an increased risk of major arrhythmic events (MAE). Previous studies reported that a wide QRS complex may be useful as a predictor of MAE in BrS patients. We aimed to assess the correlation of wide QRS complex with MAE by a systematic review and meta-analysis. METHODS We comprehensively searched the databases of MEDLINE and EMBASE from inception to June 2019. Included studies were cohort and case control studies that reported QRS duration and the relationship between wide QRS complex (>120 milliseconds) and MAE (sudden cardiac death, sudden cardiac arrest, ventricular fibrillation, sustained ventricular tachycardia, or appropriate shock). Data from each study were combined using the random-effects model. RESULTS Twenty-two studies from 2007 to 2018 were included in this meta-analysis involving 4,814 BrS patients. The mean age was 46.1 ± 12.8 years. The patients were predominately men (77.6%). Wide QRS duration was an independent predictor of MAE (pooled risk ratio 1.55, 95% confidence interval: 1.04-2.30, P = .30, I 2 = 38.4%). QRS duration was wider in BrS who had history of MAE (weight mean difference = 8.12 milliseconds, 95% confidence interval: 5.75-10.51 milliseconds). CONCLUSIONS Our study demonstrated that QRS duration is wider in BrS who had history of MAE, and a wide QRS complex is associated with 1.55 times higher risk of MAE in BrS populations. Wide QRS complex can be considered for risk stratification in prediction of MAE in patients with BrS, especially when considering implantable cardioverter-defibrillator placement in asymptomatic patients.
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Affiliation(s)
- Pattara Rattanawong
- Department of Cardiovascular MedicineMayo ClinicPhoenixAZUSA
- Faculty of Medicine Ramathibodi HospitalMahidol UniversityBangkokThailand
| | - Jakrin Kewcharoen
- University of Hawaii Internal Medicine Residency ProgramHonoluluHIUSA
| | | | | | | | | | | | - Poemlarp Mekraksakit
- Department of Internal MedicineTexas Tech University Health Sciences CenterLubbockTXUSA
| | - Wasawat Vutthikraivit
- Department of Internal MedicineTexas Tech University Health Sciences CenterLubbockTXUSA
| | - Dan Sorajja
- Department of Cardiovascular MedicineMayo ClinicPhoenixAZUSA
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32
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Isbister JC, Krahn AD, Semsarian C, Sy RW. Brugada Syndrome: Clinical Care Amidst Pathophysiological Uncertainty. Heart Lung Circ 2020; 29:538-546. [PMID: 31959551 DOI: 10.1016/j.hlc.2019.11.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Revised: 11/14/2019] [Accepted: 11/25/2019] [Indexed: 12/11/2022]
Abstract
Brugada syndrome (BrS) is a complex clinical entity with ongoing conjecture regarding its genetic basis, underlying pathophysiology, and clinical management. Within this paradigm of uncertainty, clinicians are faced with the challenge of caring for patients with this uncommon but potentially fatal condition. This article reviews the current understanding of BrS and highlights the "known unknowns" to reinforce the need for flexible clinical practice in parallel with ongoing scientific discovery.
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Affiliation(s)
- Julia C Isbister
- Agnes Ginges Centre for Molecular Cardiology at Centenary Institute, University of Sydney, Sydney, NSW, Australia; Faculty of Medicine and Health, University of Sydney, Sydney, NSW, Australia; Department of Cardiology, Royal Prince Alfred Hospital, Sydney, NSW, Australia
| | - Andrew D Krahn
- Division of Cardiology, University of British Columbia, Vancouver, Canada
| | - Christopher Semsarian
- Agnes Ginges Centre for Molecular Cardiology at Centenary Institute, University of Sydney, Sydney, NSW, Australia; Faculty of Medicine and Health, University of Sydney, Sydney, NSW, Australia; Department of Cardiology, Royal Prince Alfred Hospital, Sydney, NSW, Australia
| | - Raymond W Sy
- Faculty of Medicine and Health, University of Sydney, Sydney, NSW, Australia; Department of Cardiology, Royal Prince Alfred Hospital, Sydney, NSW, Australia.
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33
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Supreeth RN, Francis J. Fragmented QRS - Its significance. Indian Pacing Electrophysiol J 2019; 20:27-32. [PMID: 31843558 PMCID: PMC6994396 DOI: 10.1016/j.ipej.2019.12.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2019] [Accepted: 12/11/2019] [Indexed: 12/16/2022] Open
Abstract
Fragment QRS (fQRS) complex is a myocardial conduction abnormality that indicates myocardial scar. It is defined as additional notches in the QRS complex. Though initially fQRS was defined in the setting of normal QRS duration (<120 m s), later it has been expanded to include conditions with wide QRS complexes as in bundle branch block, ventricular ectopy and paced rhythm, when more than 2 notches are present. It is an important, yet often overlooked marker of mortality and arrhythmic events in many cardiac diseases. The significance of fQRS lies in the fact that it just requires a surface ECG for its recording and the value of information about the condition of the heart it dispenses based on the clinical setting. We review the role of fQRS in predicting adverse cardiac events in various conditions.
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Affiliation(s)
- R N Supreeth
- Baby Memorial Hospital, Kozhikode, Kerala, India
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34
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Nagase S, Kamakura T, Kataoka N, Wada M, Yamagata K, Ishibashi K, Inoue YY, Miyamoto K, Noda T, Aiba T, Izumi C, Noguchi T, Yasuda S, Shimizu W, Kamakura S, Kusano K. Low-Voltage Type 1 ECG Is Associated With Fatal Ventricular Tachyarrhythmia in Brugada Syndrome. J Am Heart Assoc 2019; 7:e009713. [PMID: 30571377 PMCID: PMC6404198 DOI: 10.1161/jaha.118.009713] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Background Epicardial mapping can reveal low‐voltage areas on the right ventricular outflow tract in patients with Brugada syndrome with several ventricular fibrillation (VF) episodes. A type 1 ECG is associated with an abnormal electrogram on right ventricular outflow tract epicardium. This study investigated the clinical significance of the amplitude of type 1 ECGs in patients with Brugada syndrome. Methods and Results In 209 patients with Brugada syndrome with a spontaneous type 1 ECG (26 resuscitated from VF, 54 with syncope, and 129 asymptomatic), the amplitude of the ECG in leads exhibiting type 1 was measured among V1 to V3 leads positioned in the standard and upper 1 and 2 intercostal spaces. The number of ECG leads exhibiting type 1 did not differ among groups. The averaged amplitude of type 1 ECG was, however, significantly smaller in the group resuscitated from VF than in the asymptomatic group (P<0.05). Moreover, the minimum amplitude of type 1 ECG was significantly smaller in the group resuscitated from VF than in the group with syncope and the asymptomatic group (P<0.05 and P<0.01, respectively). During follow‐up (56±48 months), VF occurred in 29 patients. Kaplan‐Meier analysis revealed that patients with the minimum amplitude of type 1 ECG lower than or at the median value had a higher incidence of VF (log‐rank test, P<0.01). In multivariate analysis, syncope, past VF episode, and minimum amplitude of type 1 ECG ≤0.8 mV were independent predictors of VF events during follow‐up. Conclusions Low‐voltage type 1 ECG is highly and independently related to fatal ventricular tachyarrhythmia in patients with Brugada syndrome.
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Affiliation(s)
- Satoshi Nagase
- 1 Division of Arrhythmia and Electrophysiology Department of Cardiovascular Medicine National Cerebral and Cardiovascular Center Suita Japan
| | - Tsukasa Kamakura
- 1 Division of Arrhythmia and Electrophysiology Department of Cardiovascular Medicine National Cerebral and Cardiovascular Center Suita Japan
| | - Naoya Kataoka
- 1 Division of Arrhythmia and Electrophysiology Department of Cardiovascular Medicine National Cerebral and Cardiovascular Center Suita Japan
| | - Mitsuru Wada
- 1 Division of Arrhythmia and Electrophysiology Department of Cardiovascular Medicine National Cerebral and Cardiovascular Center Suita Japan
| | - Kenichiro Yamagata
- 1 Division of Arrhythmia and Electrophysiology Department of Cardiovascular Medicine National Cerebral and Cardiovascular Center Suita Japan
| | - Kohei Ishibashi
- 1 Division of Arrhythmia and Electrophysiology Department of Cardiovascular Medicine National Cerebral and Cardiovascular Center Suita Japan
| | - Yuko Y Inoue
- 1 Division of Arrhythmia and Electrophysiology Department of Cardiovascular Medicine National Cerebral and Cardiovascular Center Suita Japan
| | - Koji Miyamoto
- 1 Division of Arrhythmia and Electrophysiology Department of Cardiovascular Medicine National Cerebral and Cardiovascular Center Suita Japan
| | - Takashi Noda
- 1 Division of Arrhythmia and Electrophysiology Department of Cardiovascular Medicine National Cerebral and Cardiovascular Center Suita Japan
| | - Takeshi Aiba
- 1 Division of Arrhythmia and Electrophysiology Department of Cardiovascular Medicine National Cerebral and Cardiovascular Center Suita Japan
| | - Chisato Izumi
- 1 Division of Arrhythmia and Electrophysiology Department of Cardiovascular Medicine National Cerebral and Cardiovascular Center Suita Japan
| | - Teruo Noguchi
- 1 Division of Arrhythmia and Electrophysiology Department of Cardiovascular Medicine National Cerebral and Cardiovascular Center Suita Japan
| | - Satoshi Yasuda
- 1 Division of Arrhythmia and Electrophysiology Department of Cardiovascular Medicine National Cerebral and Cardiovascular Center Suita Japan
| | - Wataru Shimizu
- 2 Department of Cardiovascular Medicine Nippon Medical School Tokyo Japan
| | - Shiro Kamakura
- 1 Division of Arrhythmia and Electrophysiology Department of Cardiovascular Medicine National Cerebral and Cardiovascular Center Suita Japan
| | - Kengo Kusano
- 1 Division of Arrhythmia and Electrophysiology Department of Cardiovascular Medicine National Cerebral and Cardiovascular Center Suita Japan
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35
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Snir AD, Raju H. Current Controversies and Challenges in Brugada Syndrome. Eur Cardiol 2019; 14:169-174. [PMID: 31933686 PMCID: PMC6950287 DOI: 10.15420/ecr.2019.12.2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2019] [Accepted: 06/06/2019] [Indexed: 12/12/2022] Open
Abstract
More than three decades since its initial description in 1993, Brugada syndrome remains engulfed in controversy. This review aims to shed light on the main challenges surrounding the diagnostic pathway and criteria, risk stratification of asymptomatic patients, pharmacological and interventional risk modification strategies as well as our current pathophysiological understanding of the disease.
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Affiliation(s)
- Afik D Snir
- Royal Prince Alfred HospitalSydney, Australia
| | - Hariharan Raju
- Faculty of Medicine and Health Sciences, Macquarie UniversitySydney, Australia
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Giustetto C, Nangeroni G, Cerrato N, Rudic B, Tülümen E, Gribaudo E, Giachino DF, Barbonaglia L, Biava LM, Carvalho P, Bergamasco L, Borggrefe M, Gaita F. Ventricular conduction delay as marker of risk in Brugada Syndrome. Results from the analysis of clinical and electrocardiographic features of a large cohort of patients. Int J Cardiol 2019; 302:171-177. [PMID: 31771792 DOI: 10.1016/j.ijcard.2019.11.121] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 10/04/2019] [Accepted: 11/15/2019] [Indexed: 02/09/2023]
Abstract
BACKGROUND Brugada Syndrome is a genetic arrhythmogenic disease with a variable clinical spectrum. The role of clinical and ECG parameters in the risk stratification is still uncertain. AIMS In a large cohort of Brugada patients we analysed clinical and ECG features to determine the variables with prognostic value for the occurrence of a first documented arrhythmic event and for recurrences. METHODS We enrolled 614 patients, subdivided into 3 groups according to their clinical presentation: 531 (88%) asymptomatic, 69 (10%) with previous unexplained syncope and 14 (2%) with aborted sudden death. We also compared the ECG characteristics of patients with a single documented arrhythmic event (either at presentation or at follow-up, 17 patients), with those of patients with arrhythmic recurrences (13 patients). RESULTS The event rate was 1.3% in the asymptomatic patients and 15% among patients with unexplained syncope (median follow-up 6 years), p < 0.0001. In both groups a QRS duration ≥110 ms in lead II and/or V6 and/or S wave duration ≥40 ms in lead I and/or II were significant risk factors for the occurrence and timing of events at follow-up. The same ECG risk factors were also significantly associated with arrhythmic recurrences. CONCLUSIONS The arrhythmic risk of Brugada patients is related not only to the symptoms at presentation, but also to the presence of a ventricular conduction delay (QRS duration ≥ 110 ms and/or S wave duration ≥ 40 ms). The ECG conduction parameters also affect the timing of events and recurrences.
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Affiliation(s)
- Carla Giustetto
- Division of Cardiology, University of Torino, Department of Medical Sciences, "Città della Salute e della Scienza" Hospital, Torino, Italy.
| | - Giulia Nangeroni
- Division of Cardiology, University of Torino, Department of Medical Sciences, "Città della Salute e della Scienza" Hospital, Torino, Italy
| | - Natascia Cerrato
- Division of Cardiology, University of Torino, Department of Medical Sciences, "Città della Salute e della Scienza" Hospital, Torino, Italy
| | - Boris Rudic
- 1st Department of Medicine-Cardiology, University Medical Center Mannheim, Mannheim, Germany; DZHK (German Center for Cardiovascular Research), Partner Site Heidelberg/Mannheim, Mannheim, Germany
| | - Erol Tülümen
- 1st Department of Medicine-Cardiology, University Medical Center Mannheim, Mannheim, Germany; DZHK (German Center for Cardiovascular Research), Partner Site Heidelberg/Mannheim, Mannheim, Germany
| | - Elena Gribaudo
- Division of Cardiology, University of Torino, Department of Medical Sciences, "Città della Salute e della Scienza" Hospital, Torino, Italy
| | - Daniela Francesca Giachino
- Medical Genetics, University of Torino, Department of Clinical and Biological Sciences, San Luigi Gonzaga Hospital, Orbassano, Italy
| | | | - Lorenza Michela Biava
- Division of Cardiology, University of Torino, Department of Medical Sciences, "Città della Salute e della Scienza" Hospital, Torino, Italy
| | - Paula Carvalho
- Division of Cardiology, University of Torino, San Luigi Gonzaga Hospital, Orbassano, Italy
| | - Laura Bergamasco
- Division of Cardiology, University of Torino, Department of Medical Sciences, "Città della Salute e della Scienza" Hospital, Torino, Italy
| | - Martin Borggrefe
- 1st Department of Medicine-Cardiology, University Medical Center Mannheim, Mannheim, Germany; DZHK (German Center for Cardiovascular Research), Partner Site Heidelberg/Mannheim, Mannheim, Germany
| | - Fiorenzo Gaita
- Division of Cardiology, University of Torino, Department of Medical Sciences, "Città della Salute e della Scienza" Hospital, Torino, Italy
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37
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Boukens BJ, Opthof T, Coronel R. J-Waves in Epicardial Electrograms Can Guide Ablation of Arrhythmogenic Substrates. Circ Res 2019; 124:205-207. [PMID: 30653434 DOI: 10.1161/circresaha.118.314414] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Bastiaan J Boukens
- From the Department of Medical Biology (B.J.B.), Amsterdam Cardiovascular Sciences, University of Amsterdam, Amsterdam UMC, the Netherlands
| | - Tobias Opthof
- Department of Experimental Cardiology (T.O., R.C.), Amsterdam Cardiovascular Sciences, University of Amsterdam, Amsterdam UMC, the Netherlands
| | - Ruben Coronel
- Department of Experimental Cardiology (T.O., R.C.), Amsterdam Cardiovascular Sciences, University of Amsterdam, Amsterdam UMC, the Netherlands.,IHU Liryc, Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, France (R.C.)
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38
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Pranata R, Yonas E, Vania R, Huang I. Markers of ventricular repolarization as an additional non-invasive electrocardiography parameters for predicting ventricular tachycardia/fibrillation in patients with Brugada Syndrome - A systematic review and meta-analysis. Indian Pacing Electrophysiol J 2019; 19:205-210. [PMID: 31238124 PMCID: PMC6904796 DOI: 10.1016/j.ipej.2019.06.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Accepted: 06/21/2019] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND Controversies surrounded the management of asymptomatic Brugada syndrome. Prognostication using electrophysiology study (EPS) is disputable. Non-invasive parameters may be a valuable additional tool for risk stratification. We aim to evaluate the use markers of ventricular repolarization including Tpeak-to-Tend (TpTe), Tpe Dispersion, TpTe/QT ratio, and QTc interval as additional non-invasive electrocardiography parameters for predicting ventricular tachycardia/fibrillation in patients with Brugada syndrome. METHODS We performed a comprehensive search on TpTe, Tpe Dispersion, TpTe/QT ratio, and QTc interval as a predictor for ventricular tachycardia(VT)/fibrillation(VF)/aborted sudden cardiac death/appropriate ICD shock in patients with Brugada syndromes up until October 2018. RESULTS We included ten studies in the qualitative synthesis and eight studies in meta-analysis. There were a total of 2126 subjects from ten studies. We found that TpTe interval (mean difference 11.97 m s [5.02-18.91]; p < 0.001; I2 80% possibly on ≥80-100 m s and maximum QTc interval (mean difference 11.42 m s [5.90-16.93], p < 0.001; I2 28%) were the most potential ECG parameters to predict VT/VF/AT/SCD. Tpe dispersion and TpTe/QT ratio have a high heterogeneity. Upon sensitivity analysis, there is no single study found to markedly affect heterogeneity of Tpe dispersion and TpTe/QT ratio. Removal of a study reduced maximum QTc interval heterogeneity to 0%. CONCLUSIONS Measurement of TpTe interval, Tp-e dispersion, TpTe/QT ratio, and QTc interval on ECG emerge as a promising prognostication tool which needs further investigations with a more standardized method, outcome, and cut-off points. As for now, only maximum QTc interval has a reliable result with low heterogeneity sufficiently reliable for prognostication.
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Affiliation(s)
- Raymond Pranata
- Faculty of Medicine, Universitas Pelita Harapan, Tangerang, Indonesia.
| | - Emir Yonas
- Faculty of Medicine, Universitas YARSI, Jakarta, Indonesia.
| | - Rachel Vania
- Faculty of Medicine, Universitas Pelita Harapan, Tangerang, Indonesia.
| | - Ian Huang
- Faculty of Medicine, Universitas Pelita Harapan, Tangerang, Indonesia.
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Kewcharoen J, Rattanawong P, Kanitsoraphan C, Mekritthikrai R, Prasitlumkum N, Putthapiban P, Mekraksakit P, Pattison RJ, Vutthikraivit W. Atrial fibrillation and risk of major arrhythmic events in Brugada syndrome: A meta-analysis. Ann Noninvasive Electrocardiol 2019; 24:e12676. [PMID: 31353765 DOI: 10.1111/anec.12676] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Accepted: 07/03/2019] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Brugada syndrome (BrS) is a common cause of sudden cardiac death (SCD). There is recent evidence that atrial fibrillation (AF) is associated with increased risk of SCD in general population. However, whether AF increases a risk of major arrhythmic events (MAE) in patients with BrS is still unclear. We performed a systematic review and meta-analysis to explore the effect of AF on MAE in BrS population. METHODS We searched the databases of MEDLINE and EMBASE from inception to March 2019. Included studies were published cohort studies reporting rates of MAE (ventricular fibrillation, sustained ventricular tachycardia, SCD, or sudden cardiac arrest) in BrS patients, with and without previous documented AF. Data from each study were combined using the random-effects model. RESULTS Six studies from 1,703 patients were included. There was a significant association between AF and an increased risk of MAE in patients with BrS (pooled OR = 2.37, 95% CI = 1.36-4.13, p-value = .002, I2 = 40.3%). CONCLUSIONS Our meta-analysis demonstrated that AF is associated with an increased risk of MAE in patients with BrS.
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Affiliation(s)
- Jakrin Kewcharoen
- University of Hawaii Internal Medicine Residency Program, Honolulu, HI, USA
| | - Pattara Rattanawong
- University of Hawaii Internal Medicine Residency Program, Honolulu, HI, USA.,Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | | | | | - Narut Prasitlumkum
- University of Hawaii Internal Medicine Residency Program, Honolulu, HI, USA
| | | | - Poemlarp Mekraksakit
- Department of Internal Medicine, Texas Tech University Health Sciences Center, Lubbock, TX, USA
| | - Robert J Pattison
- University of Hawaii Internal Medicine Residency Program, Honolulu, HI, USA
| | - Wasawat Vutthikraivit
- Department of Internal Medicine, Texas Tech University Health Sciences Center, Lubbock, TX, USA
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40
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Ragab AAY, Houck CA, van der Does LJME, Lanters EAH, Muskens AJQM, de Groot NMS. QRS Vector Magnitude as Predictor of Ventricular Arrhythmia in Patients With Brugada Syndrome. Am J Cardiol 2019; 123:1962-1966. [PMID: 30955864 DOI: 10.1016/j.amjcard.2019.03.018] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 03/08/2019] [Accepted: 03/14/2019] [Indexed: 11/30/2022]
Abstract
Risk stratification is the most challenging part in management of patients with Brugada syndrome (BrS). Conduction delay in the right ventricular outflow tract (RVOT) is the major mechanism underlying ventricular tachyarrhythmia (VTA) in BrS. However, QRS duration was not useful in stratifying high-risk patients in large registries. Reconstructing the traditional 12-lead electrocardiogram into QRS vector magnitude can be used to quantify depolarization dispersion and identify high-risk BrS patients. The aim of the study is to test the significance of the QRSvm as a predictor for VTA in patients with BrS. In this retrospective cohort, we included 136 patients (47 ± 15 years, 66% male) who visited outpatient clinic for cardiogenetic screening. All medical records were examined, all 12- lead electrocardiograms were reconstructed into QRSvm using Kors' quasiorthogonal method and were assessed for the presence of electrocardiographic signs indicative of RVOT conduction delay including R wave sign, deep SI, SII >SIII pattern, and Tzou criteria. QRSvm was significantly lower in patients who either presented with VTA or developed VTA during follow-up (1.24 ± 0.35 vs 1.78 ± 0.42 mV, p < 0.001). Positive RVOT conduction delay signs occurred more frequently in symptomatic patients (20% vs 7%, p < 0.001).The area under receiver operator characteristic curve for QRSvm was 0.85 (95% confidence interval [CI] 0.77 to 0.92). Using QRSvm cutoff of 1.55 mV, sensitivity and specificity were 89% and 71%, respectively. Multivariate regression analysis showed that QRSvm and RVOT signs are independent predictors for VTA in BrS patients (QRS vector magnitude: odds ratio 3.68, 95% CI 2.4 to 6.2, p = 0.001; RVOT: odds ratio 2.6, 95% CI 1.4 to 4.9, p = 0.001). In conclusion, not only electrocardiographic signs indicative of RVOT conduction delay but also QRSvm can be used as a predictor for VTA events in BrS patients.
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Affiliation(s)
- Ahmed A Y Ragab
- Department of Cardiology, Erasmus University Medical Center, Rotterdam, the Netherlands
| | - Charlotte A Houck
- Department of Cardiology, Erasmus University Medical Center, Rotterdam, the Netherlands
| | | | - Eva A H Lanters
- Department of Cardiology, Erasmus University Medical Center, Rotterdam, the Netherlands
| | - Agnes J Q M Muskens
- Department of Cardiology, Erasmus University Medical Center, Rotterdam, the Netherlands
| | - Natasja M S de Groot
- Department of Cardiology, Erasmus University Medical Center, Rotterdam, the Netherlands.
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41
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Chen C, Tan Z, Zhu W, Fu L, Kong Q, Xiong Q, Yu J, Hong K. Brugada syndrome with SCN5A mutations exhibits more pronounced electrophysiological defects and more severe prognosis: A meta-analysis. Clin Genet 2019; 97:198-208. [PMID: 30963536 DOI: 10.1111/cge.13552] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 03/25/2019] [Accepted: 03/26/2019] [Indexed: 12/19/2022]
Abstract
Whether the presence of SCN5A mutation is a predictor of BrS risk remains controversial, and patient selection bias may have weakened previous findings. Therefore, we performed this study to clarify the clinical characteristics and outcomes of BrS probands with SCN5A mutations. We systematically retrieved eligible studies published through October 2018. A total of 17 studies enrolling 1780 BrS patients were included. Overall, our results found that compared with BrS patients without SCN5A mutations, patients with SCN5A mutations exhibited a younger age at the onset of symptoms and higher rate of the spontaneous type-1 electrocardiogram pattern, more pronounced conduction or repolarization abnormalities, and increased atrial vulnerability. In addition, the presence of SCN5A mutations was associated with an elevated risk of major arrhythmic events in both Asian (odds ratio [OR] = 1.82, 95% confidence interval [CI] 1.07-3.11; P = .03) and Caucasian (OR = 2.24, 95% CI 1.02-4.90; P = .04) populations. In conclusions, patients with SCN5A mutations exhibit more pronounced electrophysiological defects and more severe prognosis. Clinicians should be cautious when utilizing genetic testing for risk stratification or treatment guidance before determining whether the causal relationship regarding SCN5A mutation status is an independent predictor of risk.
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Affiliation(s)
- Chen Chen
- Department of Cardiovascular Medicine, the Second Affiliated Hospital of Nanchang University, Nanchang 330006, China
| | - Zhaochong Tan
- Department of Cardiovascular Medicine, the Second Affiliated Hospital of Nanchang University, Nanchang 330006, China
| | - Wengen Zhu
- Department of Cardiovascular Medicine, the Second Affiliated Hospital of Nanchang University, Nanchang 330006, China
| | - Linghua Fu
- Department of Cardiovascular Medicine, the Second Affiliated Hospital of Nanchang University, Nanchang 330006, China
| | - Qiling Kong
- Department of Cardiovascular Medicine, the Second Affiliated Hospital of Nanchang University, Nanchang 330006, China
| | - Qinmei Xiong
- Department of Cardiovascular Medicine, the Second Affiliated Hospital of Nanchang University, Nanchang 330006, China
| | - Jianhua Yu
- Department of Cardiovascular Medicine, the Second Affiliated Hospital of Nanchang University, Nanchang 330006, China
| | - Kui Hong
- Department of Cardiovascular Medicine, the Second Affiliated Hospital of Nanchang University, Nanchang 330006, China.,Jiangxi Key Laboratory of Molecular Medicine, Nanchang 330006, China.,Department of Genetic Medicine, the Second Affiliated Hospital of Nanchang University, Nanchang 330006, China
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Delise P, Probst V, Allocca G, Sitta N, Sciarra L, Brugada J, Kamakura S, Takagi M, Giustetto C, Calo L. Clinical outcome of patients with the Brugada type 1 electrocardiogram without prophylactic implantable cardioverter defibrillator in primary prevention: a cumulative analysis of seven large prospective studies. Europace 2019; 20:f77-f85. [PMID: 29036426 PMCID: PMC6018881 DOI: 10.1093/europace/eux226] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2017] [Accepted: 06/17/2017] [Indexed: 12/31/2022] Open
Abstract
Aims Patients with the Brugada type 1 ECG (Br type 1) without previous aborted sudden death (aSD) who do not have a prophylactic ICD constitute a very large population whose outcome is little known. The objective of this study was to evaluate the risk of SD or aborted SD (aSD) in these patients. Methods and results We conducted a meta-analysis and cumulative analysis of seven large prospective studies involving 1568 patients who had not received a prophylactic ICD in primary prevention. Patients proved to be heterogeneous. Many were theoretically at low risk, in that they had a drug-induced Br type 1 (48%) and/or were asymptomatic (87%), Others, in contrast, had one or more risk factors. During a mean/median follow-up ranging from 30 to 48 months, 23 patients suffered SD and 1 had aSD. The annual incidence of SD/aSD was 0.5% in the total population, 0.9% in patients with spontaneous Br type 1 and 0.08% in those with drug-induced Br type 1 (P = 0.0001). The paper by Brugada et al. reported an incidence of SD more than six times higher than the other studies, probably as a result of selection bias. On excluding this paper, the annual incidence of SD/aSD in the remaining 1198 patients fell to 0.22% in the total population and to 0.38 and 0.06% in spontaneous and drug-induced Br type 1, respectively. Of the 24 patients with SD/aSD, 96% were males, the mean age was 39 ± 15 years, 92% had spontaneous Br type 1, 61% had familial SD (f-SD), and only 18.2% had a previous syncope; 43% had a positive electrophysiological study. Multiple meta-analysis of individual trials showed that spontaneous Br type 1, f-SD, and previous syncope increased the risk of SD/aSD (RR 2.83, 2.49, and 3.03, respectively). However, each of these three risk factors had a very low positive predictive value (PPV) (1.9-3.3%), while negative predictive values (NPV) were high (98.5-99.7%). The incidence of SD/aSD was only slightly higher in patients with syncope than in asymptomatic patients (2% vs. 1.5%, P = 0.6124). Patients with SD/aSD when compared with the others had a mean of 1.74 vs. 0.95 risk factors (P = 0.026). Conclusion (i) In patients with Br type 1 ECG without an ICD in primary prevention, the risk of SD/aSD is low, particularly in those with drug-induced Br type 1; (ii) spontaneous Br type 1, f-SD, and syncope increase the risk. However, each of these risk factors individually has limited clinical usefulness, owing to their very low PPV; (iii) patients at highest risk are those with more than one risk factor.
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Affiliation(s)
- Pietro Delise
- Ospedale P. Pederzoli, via Monte Baldo 24, Peschiera del Garda (Verona), Italy.,Divisione di Cardiologia, Ospedale di Conegliano, via Brigata Bisagno 4, 31015 Conegliano (Treviso), Italy
| | - Vincent Probst
- Service de cardiologie du CHU de Nantes, Hopital Nord, Bd Jacques Monod 44093, Nantes Cedex, France
| | - Giuseppe Allocca
- Divisione di Cardiologia, Ospedale di Conegliano, via Brigata Bisagno 4, 31015 Conegliano (Treviso), Italy
| | - Nadir Sitta
- Divisione di Cardiologia, Ospedale di Conegliano, via Brigata Bisagno 4, 31015 Conegliano (Treviso), Italy
| | - Luigi Sciarra
- Divion of Cardiology, Casilino Hospital, Roma, Italy
| | - Josep Brugada
- Cardiovascular Institute, Hospital Clinic Pediatric Arrhythmia Unit, Hospital Sant Joan de Deu University of Barcellona, Barcellona, Spain
| | - Shiro Kamakura
- Division of Cardiology, National Cardiovascular Center, Suita, Japan
| | - Masahiko Takagi
- Department of Internal Medicine and Cardiology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Carla Giustetto
- Division of Cardiology, Cardinal Massaia Hospital, University of Torino, Italy
| | - Leonardo Calo
- Divion of Cardiology, Casilino Hospital, Roma, Italy
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Subramanian M, Prabhu MA, Rai M, Harikrishnan MS, Sekhar S, Pai PG, Natarajan KU. A novel prediction model for risk stratification in patients with a type 1 Brugada ECG pattern. J Electrocardiol 2019; 55:65-71. [PMID: 31082614 DOI: 10.1016/j.jelectrocard.2019.04.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 03/23/2019] [Accepted: 04/03/2019] [Indexed: 10/27/2022]
Abstract
BACKGROUND Risk stratification in Brugada syndrome remains a controversial and unresolved clinical problem, especially in asymptomatic patients with a type 1 ECG pattern. The purpose of this study is to derive and validate a prediction model based on clinical and ECG parameters to effectively identify patients with a type 1 ECG pattern who are at high risk of major arrhythmic events (MAE) during follow-up. METHODS This study analysed data from 103 consecutive patients with Brugada Type 1 ECG pattern and no history of previous cardiac arrest. The prediction model was derived using logistic regression with MAE as the primary outcome, and patient demographic and electrocardiographic parameters as potential predictor variables. The model was externally validated in an independent cohort of 42 patients. RESULTS The final model (Brugada Risk Stratification [BRS] score) consisted of 4 independent predictors (1 point each) of MAE during follow-up (median 85.3 months): spontaneous type 1 pattern, QRS fragments in inferior leads≥3,S wave upslope duration ratio ≥ 0.8, and T peak - T end ≥ 100 ms. The BRS score (AUC = 0.95,95% CI 0.0.92-0.98) stratifies patients with a type 1 ECG pattern into low (BRS score ≤ 2) and high (BRS score ≥ 3) risk classes, with a class specific risk of MAE of 0-1.1% and 92.3-100% across the derivation and validation cohorts, respectively. CONCLUSIONS The BRS score is a simple bed-side tool with high predictive accuracy, for risk stratification of patients with a Brugada Type 1 ECG pattern. Prospective validation of the prediction model is necessary before this score can be implemented in clinical practice.
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Affiliation(s)
- Muthiah Subramanian
- Department of Cardiology at Amrita Institute of Medical Sciences, Amritha Vishhwa Vidhyapeetham, Ponekkara, Kochi, Kerala 682041, India
| | - Mukund A Prabhu
- Department of Cardiology at Amrita Institute of Medical Sciences, Amritha Vishhwa Vidhyapeetham, Ponekkara, Kochi, Kerala 682041, India.
| | - Maneesh Rai
- Department of Cardiology at Kasturba Medical College, Light House Hill Road, Hampankatta, Mangaluru, Karnataka 575001, India
| | - M S Harikrishnan
- Department of Cardiology at Amrita Institute of Medical Sciences, Amritha Vishhwa Vidhyapeetham, Ponekkara, Kochi, Kerala 682041, India
| | - Saritha Sekhar
- Department of Cardiology at Amrita Institute of Medical Sciences, Amritha Vishhwa Vidhyapeetham, Ponekkara, Kochi, Kerala 682041, India
| | - Praveen G Pai
- Department of Cardiology at Amrita Institute of Medical Sciences, Amritha Vishhwa Vidhyapeetham, Ponekkara, Kochi, Kerala 682041, India
| | - Kumaraswamy U Natarajan
- Department of Cardiology at Amrita Institute of Medical Sciences, Amritha Vishhwa Vidhyapeetham, Ponekkara, Kochi, Kerala 682041, India
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Nagayama T, Nagase S, Kamakura T, Wada M, Ishibashi K, Inoue YY, Miyamoto K, Noda T, Aiba T, Takaki H, Sugimachi M, Shimizu W, Noguchi T, Yasuda S, Kamakura S, Kusano K. Clinical and Electrocardiographic Differences in Brugada Syndrome With Spontaneous or Drug-Induced Type 1 Electrocardiogram. Circ J 2019; 83:532-539. [DOI: 10.1253/circj.cj-18-0643] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Tomomi Nagayama
- Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center
- Department of Cardiovascular Medicine, Fukuoka City Hospital
| | - Satoshi Nagase
- Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center
| | - Tsukasa Kamakura
- Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center
| | - Mitsuru Wada
- Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center
| | - Kohei Ishibashi
- Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center
| | - Yuko Y. Inoue
- Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center
| | - Koji Miyamoto
- Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center
| | - Takashi Noda
- Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center
| | - Takeshi Aiba
- Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center
| | - Hiroshi Takaki
- Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center
| | - Masaru Sugimachi
- Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center
| | - Wataru Shimizu
- Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center
- Department of Cardiovascular Medicine, Nippon Medical School
| | - Teruo Noguchi
- Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center
| | - Satoshi Yasuda
- Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center
| | - Shiro Kamakura
- Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center
| | - Kengo Kusano
- Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center
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Yang Y, Hu D, Sacher F, Kusano KF, Li X, Barajas-Martinez H, Hocini M, Li Y, Gao Y, Shang H, Xing Y. Meta-Analysis of Risk Stratification of SCN5A With Brugada Syndrome: Is SCN5A Always a Marker of Low Risk? Front Physiol 2019; 10:103. [PMID: 30837887 PMCID: PMC6389868 DOI: 10.3389/fphys.2019.00103] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Accepted: 01/28/2019] [Indexed: 12/17/2022] Open
Abstract
Background: SCN5A with Brugada syndrome (BrS) is not commonly considered as an independent risk marker for subsequent cardiac events. However, the risk of SCN5A combined with other clinical characteristics has not been fully investigated. Objectives: The aim of this study is to investigate and evaluate risk stratification and related risk factors of SCN5A in BrS. Methods: The databases of PubMed, EMBASE, Cochrane Library, MEDLINE, Chinese National Knowledge Infrastructure (CNKI) and Wanfang Data were searched for related studies published from January 2002 to May 2018 followed by meta-analysis. The BrS patients who underwent SCN5A gene tests were included. The prognosis and risk stratification of SCN5A combined with symptoms and asymptoms diagnosis in BrS, electrophysiology study (EPS) were then investigated and evaluated. Outcomes were defined as ventricular tachycardia/fibrillation (VT/VF), sudden cardiac death (SCD). Results: Eleven suitable studies involving 1892 BrS patients who underwent SCN5A gene tests were identified. SCN5A (+) was not considered to be a significant predictor of future cardiac events (95% CI: 0.89-2.11; P = 0.15; I 2 = 0%). However, SCN5A (+) patients with symptoms at diagnosis revealed a higher prevalence of future VT/VF, SCD compared to SCN5A (-) patients with symptoms at diagnosis. (95% CI: 1.06-3.70; P = 0.03 I 2 = 0%) Among asymptomatic patients, the risk did not significantly differ between SCN5A (+) patients and SCN5A (-) patients. (95% CI: 0.51-4.72; P = 0.45 I 2 = 0 %). In an investigation involving patients in EPS (-) BrS electrocardiogram (ECG), the risk of SCN5A (+) is higher than that of SCN5A (-) (P < 0.001). Conclusions: In BrS patients with symptoms at diagnosis or EPS (-), the meta-analysis suggests that SCN5A (+) are at a higher risk of arrhythmic events than SCN5A (-).
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Affiliation(s)
- Yihan Yang
- Guang'anmen Hospital, Chinese Academy of Chinese Medical Sciences, Beijing, China
- Beijing University of Chinese Medicine, Beijing, China
| | - Dan Hu
- Department of Cardiology and Cardiovascular Research Institution, Renmin Hospital of Wuhan University, Wuhan, China
| | - Frederic Sacher
- Hôpital Cardiologique Haut Lévêque, Lyric institute, Université de Bordeaux, Bordeaux-Pessac, France
| | - Kengo F. Kusano
- Division of Arrhythmia and Electrophysiology, Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center, Osaka, Japan
| | - Xinye Li
- Guang'anmen Hospital, Chinese Academy of Chinese Medical Sciences, Beijing, China
- Beijing University of Chinese Medicine, Beijing, China
| | | | - Mélèze Hocini
- Hôpital Cardiologique Haut Lévêque, Lyric institute, Université de Bordeaux, Bordeaux-Pessac, France
| | - Yanda Li
- Guang'anmen Hospital, Chinese Academy of Chinese Medical Sciences, Beijing, China
| | - Yonghong Gao
- Key Laboratory of Chinese Internal Medicine of the Ministry of Education, Dongzhimen Hospital Affiliated to Beijing University of Chinese Medicine, Beijing, China
| | - Hongcai Shang
- Key Laboratory of Chinese Internal Medicine of the Ministry of Education, Dongzhimen Hospital Affiliated to Beijing University of Chinese Medicine, Beijing, China
| | - Yanwei Xing
- Guang'anmen Hospital, Chinese Academy of Chinese Medical Sciences, Beijing, China
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Li X, Sacher F, Kusano KF, Barajas-Martinez H, Liu N, Li Y, Gao Y, Liu T, Shang H, Antzelevitch C, Hu D, Xing Y. Pooled Analysis of Risk Stratification of Spontaneous Type 1 Brugada ECG: Focus on the Influence of Gender and EPS. Front Physiol 2019; 9:1951. [PMID: 30766491 PMCID: PMC6365464 DOI: 10.3389/fphys.2018.01951] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Accepted: 12/22/2018] [Indexed: 11/13/2022] Open
Abstract
Aims: Risk stratification of patients with Brugada syndrome (BrS) is vital for accurate prognosis and therapeutic decisions. Spontaneous Type 1 ST segment elevation is generally considered to be an independent risk factor for arrhythmic events. Other risk factors include gender, syncope, sudden cardiac arrest (SCA), and positive electrophysiological study (EPS). However, the further risk stratification of spontaneous type 1 combined with the other risk factors remains unclear. The present study pooled data from 4 large trials aiming to systematically evaluate the risk of spontaneous Type-1 ECG when combined with one or more of these other recognized risk factors. Methods: We searched for related studies published from November 2, 2002 to February 10, 2018 in PubMed, EMBASE, Cochrane Library, MEDLINE, Chinese National Knowledge Infrastructure (CNKI), and Wanfang Databases. The pooled data were evaluated combining each risk factor with the presence of a spontaneous Type-1 ECG. All analyses were performed using Review Manager, version 5.0.12. Results: Four eligible studies involving 1,338 patients (85% males, mean age: 48.1 ± 18.1 years) were enrolled. Spontaneous Type-1 ECG was associated with higher risk for ventricular tachycardia/fibrillation (VT/VF) than cases with non-Type 1 ECG in males (odds ratio: 95% CI: 1.84–5.17; P < 0.0001), but not in females (P = 0.29). Among spontaneous Type-1 cases with syncope or with positive EPS, the difference was not statistically significant (P = 0.06 and 0.07, respectively). Patients with Type-1 ECGs and positive EPS were at higher risk than those with negative EPS (95% CI: 1.10–5.04; P = 0.03). Pooled analysis showed an association of Spontaneous Type-1 ECG, Type-1 ECGs combined with male, and Type-1 ECGs combined with positive EPS between increased risk of arrhythmic events. Conclusion: Our results indicate that in BrS patients, a spontaneous Type-1 ECG is an independent risk factor for SCD in males, but not in females. A spontaneous Type-1 BrS is associated with a worse prognosis when combined with positive EPS
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Affiliation(s)
- Xinye Li
- Guang'anmen Hospital, Chinese Academy of Chinese Medical Sciences, Beijing, China.,College of Acupuncture and Massage, Beijing University of Chinese Medicine, Beijing, China
| | - Frédéric Sacher
- Hôpital Cardiologique Haut Lévêque, Lyric Institute, Université de Bordeaux, Bordeaux-Pessac, France
| | - Kengo F Kusano
- Division of Arrhythmia and Electrophysiology, Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center, Osaka, Japan
| | | | - Nian Liu
- Beijing Anzhen Hospital, Capital Medical University, Beijing, China
| | - Yanda Li
- Guang'anmen Hospital, Chinese Academy of Chinese Medical Sciences, Beijing, China
| | - Yonghong Gao
- The Key Laboratory of Chinese Internal Medicine of the Ministry of Education, Dongzhimen Hospital Affiliated to Beijing University of Chinese Medicine, Beijing, China
| | - Tong Liu
- Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular Disease, Department of Cardiology, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin, China
| | - Hongcai Shang
- The Key Laboratory of Chinese Internal Medicine of the Ministry of Education, Dongzhimen Hospital Affiliated to Beijing University of Chinese Medicine, Beijing, China
| | - Charles Antzelevitch
- Lankenau Institute for Medical Research and Jefferson Medical College, Philadelphia, PA, United States
| | - Dan Hu
- Department of Cardiology and Cardiovascular Research Institute, Renmin Hospital of Wuhan University, Wuhan, China.,Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Yanwei Xing
- Guang'anmen Hospital, Chinese Academy of Chinese Medical Sciences, Beijing, China
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47
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Leong KM, Ng FS, Jones S, Chow JJ, Qureshi N, Koa-Wing M, Linton NW, Whinnett ZI, Lefroy DC, Davies DW, Lim PB, Peters NS, Kanagaratnam P, Varnava AM. Prevalence of spontaneous type I ECG pattern, syncope, and other risk markers in sudden cardiac arrest survivors with Brugada syndrome. PACING AND CLINICAL ELECTROPHYSIOLOGY: PACE 2019; 42:257-264. [DOI: 10.1111/pace.13587] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Revised: 11/17/2018] [Accepted: 11/24/2018] [Indexed: 12/01/2022]
Affiliation(s)
- Kevin M.W. Leong
- National Heart and Lung Institute; Imperial College London; London UK
- Imperial College Healthcare NHS Trust; London UK
| | - Fu Siong Ng
- National Heart and Lung Institute; Imperial College London; London UK
- Imperial College Healthcare NHS Trust; London UK
| | - Sian Jones
- Imperial College Healthcare NHS Trust; London UK
| | - Ji-Jian Chow
- National Heart and Lung Institute; Imperial College London; London UK
- Imperial College Healthcare NHS Trust; London UK
| | | | | | - Nicholas W.F. Linton
- National Heart and Lung Institute; Imperial College London; London UK
- Imperial College Healthcare NHS Trust; London UK
| | - Zachary I. Whinnett
- National Heart and Lung Institute; Imperial College London; London UK
- Imperial College Healthcare NHS Trust; London UK
| | | | | | - Phang Boon Lim
- National Heart and Lung Institute; Imperial College London; London UK
- Imperial College Healthcare NHS Trust; London UK
| | - Nicholas S. Peters
- National Heart and Lung Institute; Imperial College London; London UK
- Imperial College Healthcare NHS Trust; London UK
| | - Prapa Kanagaratnam
- National Heart and Lung Institute; Imperial College London; London UK
- Imperial College Healthcare NHS Trust; London UK
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48
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Espinosa Á, Ripollés-Melchor J, Brugada R, Campuzano Ó, Sarquella-Brugada G, Abad-Motos A, Zaballos-García M, Abad-Torrent A, Prieto-Gundin A, Brugada J. Brugada Syndrome: anesthetic considerations and management algorithm. Minerva Anestesiol 2018; 85:173-188. [PMID: 30394071 DOI: 10.23736/s0375-9393.18.13170-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Brugada Syndrome is characterized by arrhythmogenic risk that may be exacerbated by different metabolic and pharmacological factors. Since its first description, knowledge of this syndrome and its detection by physicians belonging to different specialties have gradually increased. The risk of arrhythmias is well known to increase in the postoperative period, and this risk is particularly accentuated in patients with Brugada Syndrome. The purpose of this review is to analyze the relationship between this syndrome and anesthesia; establish recommendations for the safe management of these patients in the surgical setting; and update the relevant concepts regarding the safety of drug administration in individuals with Brugada Syndrome.
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Affiliation(s)
- Ángel Espinosa
- Department of Cardiothoracic Anesthesia, Mohammed Bin Khalifa Bin Salman Al Khalifa Cardiac Center, Royal Medical Services, Awali, Bahrain.,Evidence Anesthesia Review Group (EAR), Department of Pharmacology, Faculty of Medicine of Complutense University of Madrid, Madrid, Spain
| | - Javier Ripollés-Melchor
- Evidence Anesthesia Review Group (EAR), Department of Pharmacology, Faculty of Medicine of Complutense University of Madrid, Madrid, Spain - .,Department of Anesthesiology and Critical Care, Infanta Leonor University Hospital, Madrid, Spain.,Madrid Complutense University, Madrid, Spain.,Spanish Perioperative Audit and Research Network (RedGERM), Zaragoza, Spain
| | - Ramón Brugada
- Cardiovascular Genetics Center, Girona Biomedical Research Institute (IDIBGI), University of Girona, Girona, Spain.,Department of Medical Sciences, School of Medicine, University of Girona, Girona, Spain.,Cardiovascular Diseases Network Biomedical Research Center (CIBERCV), Madrid, Spain.,Department of Cardiology, Josep Trueta Hospital, Girona, Spain
| | - Óscar Campuzano
- Cardiovascular Genetics Center, Girona Biomedical Research Institute (IDIBGI), University of Girona, Girona, Spain.,Department of Medical Sciences, School of Medicine, University of Girona, Girona, Spain.,Cardiovascular Diseases Network Biomedical Research Center (CIBERCV), Madrid, Spain
| | - Georgia Sarquella-Brugada
- Department of Medical Sciences, School of Medicine, University of Girona, Girona, Spain.,Unit of Pediatric Arrhythmia, Department of Cardiology, Sant Joan de Déu Hospital, Barcelona, Spain.,Section of Arrhythmia, Department of Cardiology, Clinic Hospital, University of Barcelona, Barcelona, Spain
| | - Ane Abad-Motos
- Department of Anesthesiology and Critical Care, Infanta Leonor University Hospital, Madrid, Spain.,Madrid Complutense University, Madrid, Spain.,Spanish Perioperative Audit and Research Network (RedGERM), Zaragoza, Spain
| | - Matilde Zaballos-García
- Department of Anesthesiology, Gregorio Marañón University General Hospital, Madrid, Spain.,Clinical Toxicology, Madrid Complutense University, Madrid, Spain
| | - Ana Abad-Torrent
- Department of Anesthesiology, Vall d'Hebron University Hospital, Barcelona, Spain
| | - Alejandra Prieto-Gundin
- Department of Pediatric Anesthesiology, Sant Joan de Déu Hospital, Barcelona Children's Hospital, Barcelona, Spain
| | - Josep Brugada
- Unit of Pediatric Arrhythmia, Department of Cardiology, Sant Joan de Déu Hospital, Barcelona, Spain.,Section of Arrhythmia, Department of Cardiology, Clinic Hospital, University of Barcelona, Barcelona, Spain
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49
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Tse G, Li KHC, Li G, Liu T, Bazoukis G, Wong WT, Chan MTV, Wong MCS, Xia Y, Letsas KP, Chan GCP, Chan YS, Wu WKK. Higher Dispersion Measures of Conduction and Repolarization in Type 1 Compared to Non-type 1 Brugada Syndrome Patients: An Electrocardiographic Study From a Single Center. Front Cardiovasc Med 2018; 5:132. [PMID: 30338262 PMCID: PMC6180153 DOI: 10.3389/fcvm.2018.00132] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Accepted: 09/04/2018] [Indexed: 12/26/2022] Open
Abstract
Background: Brugada syndrome (BrS) is a cardiac ion channelopathy that predisposes affected individuals to sudden cardiac death (SCD). Type 1 BrS is thought to take a more malignant clinical course than non-type 1 BrS. We hypothesized that the degrees of abnormal repolarization and conduction are greater in type 1 subjects and these differences can be detected by electrocardiography (ECG). Methods: Electrocardiographic data from spontaneous type 1 and non-type 1 BrS patients were analyzed. ECG parameters were measured from leads V1 to V3. Values were expressed as median [lower quartile-upper quartile] and compared using Kruskal-Wallis ANOVA. Results: Compared to non-type 1 BrS patients (n = 29), patients with spontaneous type 1 patterns (n = 22) showed similar (P > 0.05) heart rate (73 [64-77] vs. 68 [62-80] bpm), QRS duration (136 [124-161] vs. 127 [117-144] ms), uncorrected QT (418 [393-443] vs. 402 [386-424] ms) and corrected QT intervals (457 [414-474] vs. 430 [417-457] ms), JTpeak intervals (174 [144-183] vs. 174 [150-188] ms), Tpeak- Tend intervals (101 [93-120] vs. 99 [90-105] ms), Tpeak- Tend/QT ratios (0.25 [0.23-0.27] vs. 0.24 [0.22-0.27]), Tpeak- Tend/QRS (0.77 [0.62-0.87] vs. 0.77 [0.69-0.86]), Tpeak- Tend/(QRS × QT) (0.00074 [0.00034-0.00096] vs. 0.00073 [0.00048-0.00012] ms-1), index of Cardiac Electrophysiological Balance (iCEB, QT/QRS, marker of wavelength: 3.14 [2.56-3.35] vs. 3.21 [2.85-3.46]) and corrected iCEB (QTc/QRS: 3.25 [2.91-3.73] vs. 3.49 [2.99-3.78]). Higher QRS dispersion was seen in type 1 subjects (QRSd: 34 [24-66] vs. 24 [12-34] ms) but QT dispersion (QTd: 48 [39-71] vs. 43 [22-94] ms), QTc dispersion (QTcd: 52 [41-79] vs. 46 [23-104] ms), JTpeak dispersion (44 [23-62] vs. 45 [30-62] ms), Tpeak- Tend dispersion (28 [15-34] vs. 29 [22-53] ms) or Tpeak- Tend/QT dispersion (0.06 [0.03-0.08] vs. 0.08 [0.04-0.12]) did not differ between the two groups. Type 1 subjects showed higher (QRSd × Tpeak- Tend)/QRS (25 [19-44] vs. 19 [9-30] ms) but similar iCEB dispersion (0.83 [0.49-1.14] vs. 0.61 [0.34-0.92]) and iCEBc dispersion (0.93 [0.51-1.15] vs. 0.65 [0.39-0.96]). Conclusion: Higher levels of dispersion in conduction and repolarization are found in type 1 than non-type 1 BrS patients, potentially explaining the higher incidence of ventricular arrhythmias in the former group.
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Affiliation(s)
- Gary Tse
- Department of Medicine and Therapeutics, Faculty of Medicine, Chinese University of Hong Kong, Hong Kong, China
- Li Ka Shing Institute of Health Sciences, Faculty of Medicine, Chinese University of Hong Kong, Hong Kong, China
| | - Ka Hou Christien Li
- Department of Medicine and Therapeutics, Faculty of Medicine, Chinese University of Hong Kong, Hong Kong, China
- Li Ka Shing Institute of Health Sciences, Faculty of Medicine, Chinese University of Hong Kong, Hong Kong, China
- Faculty of Medicine, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Guangping Li
- Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular Disease, Department of Cardiology, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin, China
| | - Tong Liu
- Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular Disease, Department of Cardiology, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin, China
| | - George Bazoukis
- Laboratory of Cardiac Electrophysiology, Second Department of Cardiology, Evangelismos General Hospital of Athens, Athens, Greece
| | - Wing Tak Wong
- School of Life Sciences, The Chinese University of Hong Kong, Hong Kong, China
| | - Matthew T. V. Chan
- Department of Anaesthesia and Intensive Care, The Chinese University of Hong Kong, Hong Kong, China
| | - Martin C. S. Wong
- The Jockey Club School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong, China
| | - Yunlong Xia
- Department of Cardiology, First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Konstantinos P. Letsas
- Laboratory of Cardiac Electrophysiology, Second Department of Cardiology, Evangelismos General Hospital of Athens, Athens, Greece
| | - Gary Chin Pang Chan
- Department of Medicine and Therapeutics, Faculty of Medicine, Chinese University of Hong Kong, Hong Kong, China
| | - Yat Sun Chan
- Department of Medicine and Therapeutics, Faculty of Medicine, Chinese University of Hong Kong, Hong Kong, China
| | - William K. K. Wu
- Li Ka Shing Institute of Health Sciences, Faculty of Medicine, Chinese University of Hong Kong, Hong Kong, China
- Department of Anaesthesia and Intensive Care, The Chinese University of Hong Kong, Hong Kong, China
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50
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Yuan M, Tian C, Li X, Yang X, Wang X, Yang Y, Liu N, Kusano KF, Barajas-Martinez H, Hu D, Shang H, Gao Y, Xing Y. Gender Differences in Prognosis and Risk Stratification of Brugada Syndrome: A Pooled Analysis of 4,140 Patients From 24 Clinical Trials. Front Physiol 2018; 9:1127. [PMID: 30246798 PMCID: PMC6113678 DOI: 10.3389/fphys.2018.01127] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Accepted: 07/27/2018] [Indexed: 12/23/2022] Open
Abstract
Background: Male gender has been consistently shown to be a risk factor for a greater number of arrhythmic events in patients with Brugada Syndrome (BrS). However, there have been no large-scale comprehensive pooled analyses to statistically and systematically verify this association. Therefore, we conducted a pooled analysis on gender differences in prognosis and risk stratification of BrS with a largest sample capacity at present. Methods: We searched PubMed, Embase, Medline, Cochrane Library databases, Chinese National Knowledge Infrastructure, and Wanfang Data for relevant studies published from 2002 to 2017. The prognosis and risk stratification of BrS and risk factors were then investigated and evaluated according to gender. Results: Twenty-four eligible studies involving 4,140 patients were included in the analysis. Male patients (78.1%) had a higher risk of arrhythmic events than female patients (95% confidence interval: 1.46–2.91, P < 0.0001). Among the male population, there were statistical differences between symptomatic patients and asymptomatic patients (95% CI: 2.63–7.86, P < 0.00001), but in the female population, no statistical differences were found. In the female subgroup, electrophysiological study (EPS) positive patients had a tendency toward a higher risk of arrhythmic events than EPS-negative patients (95% CI: 0.93–29.77, P = 0.06). Conclusions: Male patients are at a higher risk of arrhythmic events than female patients. Within the male population, symptomatic patients have a significantly higher risk profile compared to asymptomatic patients, but no such differences are evident within the female population. Consequently, in the female population, the risk of asymptomatic patterns cannot be underestimated.
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Affiliation(s)
- Mengchen Yuan
- Guang'anmen Hospital, Chinese Academy of Chinese Medical Sciences, Beijing, China.,Key Laboratory of Chinese Internal Medicine of Ministry of Education and Beijing, Dongzhimen Hospital Affiliated to Beijing University of Chinese Medicine, Beijing, China
| | - Chao Tian
- Guang'anmen Hospital, Chinese Academy of Chinese Medical Sciences, Beijing, China.,Key Laboratory of Chinese Internal Medicine of Ministry of Education and Beijing, Dongzhimen Hospital Affiliated to Beijing University of Chinese Medicine, Beijing, China
| | - Xinye Li
- Guang'anmen Hospital, Chinese Academy of Chinese Medical Sciences, Beijing, China
| | - Xinyu Yang
- Guang'anmen Hospital, Chinese Academy of Chinese Medical Sciences, Beijing, China.,Key Laboratory of Chinese Internal Medicine of Ministry of Education and Beijing, Dongzhimen Hospital Affiliated to Beijing University of Chinese Medicine, Beijing, China
| | - Xiaofeng Wang
- Key Laboratory of Chinese Internal Medicine of Ministry of Education and Beijing, Dongzhimen Hospital Affiliated to Beijing University of Chinese Medicine, Beijing, China
| | - Yihan Yang
- Guang'anmen Hospital, Chinese Academy of Chinese Medical Sciences, Beijing, China.,Key Laboratory of Chinese Internal Medicine of Ministry of Education and Beijing, Dongzhimen Hospital Affiliated to Beijing University of Chinese Medicine, Beijing, China
| | - Nian Liu
- Department of Cardiology, Beijing An Zhen Hospital of the Capital University of Medical Sciences, Beijing, China
| | - Kengo F Kusano
- Division of Arrhythmia and Electrophysiology, Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan
| | | | - Dan Hu
- Masonic Medical Research Laboratory, Utica, NY, United States.,Hubei Key Laboratory of Cardiology, Department of Cardiology and Cardiovascular Research Institute, Renmin Hospital of Wuhan University, Wuhan, China
| | - Hongcai Shang
- Key Laboratory of Chinese Internal Medicine of Ministry of Education and Beijing, Dongzhimen Hospital Affiliated to Beijing University of Chinese Medicine, Beijing, China
| | - Yonghong Gao
- Key Laboratory of Chinese Internal Medicine of Ministry of Education and Beijing, Dongzhimen Hospital Affiliated to Beijing University of Chinese Medicine, Beijing, China
| | - Yanwei Xing
- Guang'anmen Hospital, Chinese Academy of Chinese Medical Sciences, Beijing, China
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