What characteristic finding on an EKG is indicative of Brugada syndrome?

What characteristic finding on an EKG is indicative of Brugada syndrome?

• A. Right bundle branch block QRS with ST segment elevation in leads V1-V3
• B. Flat, depressed ST segment in lead II
• C. Normal sinus rhythm
• D. Significant Q waves in lead V5

Answer: (A)

Brugada syndrome is characterized by a specific pattern on the EKG known as a right bundle branch block (RBBB) pattern with associated ST segment elevation in the right precordial leads, specifically V1 to V3. This finding is crucial for identifying Brugada syndrome, a genetic condition that can lead to life-threatening arrhythmias.

In individuals with this syndrome, the RBBB manifests as a wide QRS complex, and the ST segment elevation observed in leads V1 to V3 is typically followed by a negative T wave. This distinctive EKG finding is of paramount importance because it signifies an increased risk for sudden cardiac events.

The other EKG findings presented do not align with the recognized features of Brugada syndrome. For example, a flat or depressed ST segment in lead II is suggestive of different cardiac conditions and does not correlate with Brugada syndrome. Similarly, a normal sinus rhythm does not display any of the structural or electrical abnormalities associated with this syndrome, and significant Q waves in lead V5 also indicate other types of myocardial pathology, rather than the hallmark traits of Brugada syndrome. Therefore, the presence of right bundle branch block and the specific pattern of ST segment elevation in leads V1-V3 is what makes the first choice