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2021年1月28日 · Standard or Precordial Masquerading Bundle Branch Block (MBBB). In both types, RBBB is shown by typical RSR’ pattern in lead V1. LBBB pattern with near-absence of S waves in lead I in the limb leads. Left axis deviation and QS complexes in Leads II, III, aVF and M pattern in lead aVL.

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2015年11月6日 · Introduction: Masquerading bundle branch block (MBBB) is a rare cardiac conduction anomaly characterized in the Electrocardiogram (EKG) by Right Bundle Branch Block in the precordial leads and Left Bundle Branch Block in frontal leads. The available evidence indicates that it carries poor prognosis and that it is often underdiagnosed.

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2025年1月23日 · Current electrocardiographic (ECG) definitions cannot distinguish pronounced conduction delay (first-degree block) from complete conduction block. We are presenting here 2 cases of first-degree left bundle branch block (LBBB) that may be relevant when interpreting findings and observations during conduction system pacing.

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