Southeast Asian Brugada Syndrome Cohort

Study Overview
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Brief Summary
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Brugada syndrome (BrS) is the leading cause of sudden death in young Asian adults including Thailand. This syndrome may be hereditary and involve mutations in certain genes. Aim of the study is to identify the relationship between genetic variants and the diagnosis/clinical severity of patients with BrS.

Detailed Description
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This cohort study recruits BrS patients with confirmed Brugada type 1 ECG and healthy volunteers in Thailand. Data collection consists of demographic, clinical data, ECG and blood sample for genetic studies. Genotyping was done by whole genome sequencing and SNP array then compared between cases and controls. Each BrS patient will be followed up prospectively for symptoms and AICD shock. Subsequently, the study will analyze relationship between genetic variants and clinical data against clinical severity of BrS patients.

Official Title
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Discovering the Genetic Causes of Brugada Syndrome in Thais and Southeast Asian Population

Conditions
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Brugada Syndrome

Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Thai nationality The patient has at least one of confirmed Brugada type 1 ECG in at least one of right precordial leads (v1 or v2) with or without pharmacologic provocative testing. The confirmed ECG is standard 12 lead ECG or Brugada lead Exclusion Criteria: The patient has other cardiac diseases such as ischemic heart disease, valvular heart disease, congenital heart disease, myocarditis and pericarditis The patient has type 2 or type 3 Brugada ECG without type 1 ECG during pharmacologic provocative testing and/or Brugada lead The patient had one time of Brugada type 1 ECG during drug use without reproducibility
Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Case<br>Thai patients with diagnosed Brugada syndrome by confirmed Brugada type 1 ECG. | |
| Control<br>Healthy volunteers without Brugada marker from ECG. | |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Relationship between genetic variants and Brugada syndrome (Brugada syndrome phenotype) | Case-Control study of genetic variants in BrS cases vs controls. Genetic study was done by whole genome sequencing and SNP array. Association analysis assessed by polygenic risk score and regression coefficients. | 7 years | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Natural history of Brugada syndrome (survival from arrhythmic events) | Cohort study to followed up BrS patients with or with arrhythmic events which assessed by survival curve analysis. | 7 years | 
| Epidemiology of Brugada syndrome | To study prevalence of Brugada syndrome in Thailand. | 7 years | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Brugada Syndrome, Genetics, Epidemiology, Thai, Southeast Asia