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Brugada ECG patterns in athletes
1Division of Cardiology, Cardiac Electrophysiology, UNC School of Medicine, 160 Dental Circle, CB 7075, Chapel Hill, NC.
Insights
Brugada syndrome, a cause of sudden cardiac death, involves abnormal heart electrical activity. This review clarifies diagnostic electrocardiogram (ECG) patterns and evaluation criteria, especially for athletes.
Area of Science:
- Cardiology
- Electrophysiology
- Sudden Cardiac Death
Background:
- Brugada syndrome accounts for significant sudden cardiac deaths globally, particularly in individuals with structurally normal hearts.
- The arrhythmogenic substrate is linked to heterogeneous repolarization and depolarization in the right ventricle's outflow tract.
Purpose of the Study:
- To review Brugada syndrome, its electrocardiogram (ECG) patterns, and diagnostic criteria.
- To address challenges in distinguishing Brugada patterns, especially in athletes.
- To provide recommendations for evaluating Brugada ECG patterns.
Main Methods:
- Review of existing literature on Brugada syndrome and ECG patterns.
- Analysis of proposed criteria for assessing Brugada ECG patterns.
- Emphasis on the importance of correct precordial ECG lead placement.
Main Results:
- The diagnostic coved Type I ECG pattern is infrequently observed.
- Differentiating Type 2 (saddleback) and other Brugada-like patterns poses diagnostic challenges.
- Various criteria exist for assessing Brugada ECG patterns.
Conclusions:
- Accurate ECG interpretation and lead placement are crucial for diagnosing Brugada syndrome.
- Recent criteria and evaluation recommendations are presented to aid clinicians.
- Further clarity is needed for differentiating Brugada patterns, particularly in specific populations like athletes.
Abstract:
Brugada syndrome is responsible for up to 4% of all sudden cardiac deaths worldwide and up to 20% of sudden cardiac deaths in patients with structurally normal hearts. Heterogeneity of repolarization and depolarization, particularly over the right ventricle and the outflow tract, is responsible for the arrhythmogenic substrate. The coved Type I ECG pattern is considered diagnostic of the syndrome but its prevalence is very low. Distinguishing between a saddle back Type 2 Brugada pattern and one of many "Brugada-like" patterns presents challenges especially in athletes. A number of criteria have been proposed to assess Brugada ECG patterns. Proper precordial ECG lead placement is paramount. This paper reviews Brugada syndrome, Brugada ECG patterns, and recently proposed criteria. Recommendations for evaluating a Brugada ECG pattern are provided.
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