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Transient high-degree right bundle branch block masking the type 1 Brugada ECG pattern associated with possible transient early repolarization syndrome.

Andrés Ricardo Pérez RieraRaimundo Barbosa BarrosRodrigo Daminello-RaimundoLuiz Carlos de AbreuKjell Nikus
Published in: Annals of noninvasive electrocardiology : the official journal of the International Society for Holter and Noninvasive Electrocardiology, Inc (2019)
The Brugada syndrome (BrS) was the last electrocardiographic syndrome described in the 20th century. The initial description included right bundle branch block (RBBB), persistent ST-segment elevation in the right precordial leads, absence of structural heart disease, and propensity to unexplained syncope and/or sudden death mainly during nocturnal rest. Currently, we know that the first three components are not constant or true since RBBB is present in only 28% of cases, the ST-segment elevation is dynamic, at times absent, and there are discrete structural changes in the right ventricular outflow tract. Additionally, the presence of RBBB can hide the typical type 1 Brugada ECG pattern. We present a very unusual case of spontaneous transient RBBB that revealed a hidden type 1 Brugada ECG pattern that could be seen in the beat with normal ventricular conduction.
Keyphrases
  • heart rate
  • heart rate variability
  • cerebral ischemia
  • case report
  • left ventricular
  • heart failure
  • blood pressure
  • pulmonary embolism
  • pulmonary hypertension
  • single cell
  • brain injury
  • mitral valve