Brugada syndrome

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Brugada syndrome
ECG patterns in Brugada syndrome
Synonyms N/A
Pronounce N/A
Specialty N/A
Symptoms Syncope, sudden cardiac death
Complications N/A
Onset Typically in adulthood
Duration Lifelong
Types N/A
Causes Genetic mutations, primarily in the SCN5A gene
Risks Family history, male gender, fever
Diagnosis Electrocardiogram (ECG), genetic testing
Differential diagnosis Long QT syndrome, arrhythmogenic right ventricular dysplasia
Prevention Avoidance of certain medications, treatment of fever
Treatment Implantable cardioverter-defibrillator (ICD), medication
Medication N/A
Prognosis Variable, risk of sudden death
Frequency 1 in 5,000 to 10,000 people
Deaths N/A


Brugada Syndrome Brugada syndrome is a genetic disorder that results in abnormal electrical activity within the heart, leading to an increased risk of sudden cardiac death. It is characterized by a specific pattern on an electrocardiogram (ECG) and is often associated with ventricular fibrillation.

Epidemiology[edit]

Brugada syndrome is more prevalent in certain populations, particularly in Southeast Asia. It is estimated to affect 1 in 2,000 people worldwide. The condition is more common in males than females, with a male-to-female ratio of approximately 8:1.

Genetics[edit]

Brugada syndrome is primarily inherited in an autosomal dominant manner. Mutations in the SCN5A gene, which encodes the cardiac sodium channel, are the most common genetic cause. However, mutations in other genes such as CACNA1C, CACNB2, and SCN1B have also been implicated.

Pathophysiology[edit]

The hallmark of Brugada syndrome is the disruption of the normal electrical activity of the heart, particularly in the right ventricular outflow tract. This disruption is often due to a loss of function in the sodium channels, leading to a predisposition to ventricular arrhythmias.

Clinical Presentation[edit]

Patients with Brugada syndrome may be asymptomatic or present with symptoms such as:

  • Syncope
  • Palpitations
  • Sudden cardiac arrest

The condition is often diagnosed after a family member experiences sudden cardiac death or during an evaluation for syncope.

Diagnosis[edit]

The diagnosis of Brugada syndrome is primarily based on the characteristic ECG findings, which include:

  • Coved-type ST-segment elevation in the right precordial leads (V1-V3)

A provocative test with sodium channel blockers such as ajmaline or flecainide may be used to unmask the ECG pattern in suspected cases.

Management[edit]

The management of Brugada syndrome focuses on preventing sudden cardiac death. Treatment options include:

  • Implantable cardioverter-defibrillator (ICD) for high-risk patients
  • Avoidance of drugs that can exacerbate the condition
  • Lifestyle modifications, such as avoiding excessive alcohol and fever management

Prognosis[edit]

The prognosis of Brugada syndrome varies depending on the presence of symptoms and the risk of arrhythmias. Asymptomatic individuals with a normal ECG have a lower risk of sudden cardiac death compared to those with a history of syncope or documented ventricular arrhythmias.

Gallery[edit]

  • Brugada syndrome ECGs
    Brugada syndrome ECGs
  • Wavebreak and re-entry as a mechanism of arrhythmias
    Wavebreak and re-entry as a mechanism of arrhythmias
  • Brugada
    Brugada
  • Brugada syndrome type 1 example 1
    Brugada syndrome type 1 example 1
  • Brugada syndrome type 2 example 1
    Brugada syndrome type 2 example 1
  • AICD
    AICD

See Also[edit]

External Links[edit]



Cardiovascular disease A-Z

Most common cardiac diseases

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Genetic disorders relating to deficiencies of transcription factor or coregulators
(1) Basic domains
(2) Zinc finger
DNA-binding domains
(3) Helix-turn-helix domains
3.1
3.2
3.3
3.5
(4) β-Scaffold factors
with minor groove contacts
(0) Other transcription factors
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