Which readings on electrocardiogram (ECG) are characteristic of Brugada syndrome (BrS)?

Updated: Apr 03, 2020
  • Author: Jose M Dizon, MD; Chief Editor: Mikhael F El-Chami, MD  more...
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Answer

When the usual relative durations of repolarization are not altered, the T wave remains upright, causing a saddleback ECG pattern (type 2 or 3). When the alteration in repolarization is sufficient to cause a reversal of the normal gradient of repolarization, the T wave inverts, and the coved (type 1) ECG pattern is seen. In a similar way, a heterogeneous alteration in cardiac repolarization may predispose to the development of reentrant arrhythmias, termed phase 2 reentry, that can clinically cause ventricular tachycardia and ventricular fibrillation. [18]


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