What type of aberrant conduction is typically associated with a right bundle branch block?

The type of aberrant conduction typically associated with a right bundle branch block is characterized by a wide QRS complex with a specific pattern known as an rsR' pattern, especially seen in lead V1 of an electrocardiogram (ECG).

In the case of right bundle branch block, the electrical impulse encounters a delay in its conduction through the right bundle branch. As a result, the depolarization of the right ventricle occurs later than that of the left ventricle. This delay is what leads to a wide QRS complex on the ECG, typically measuring more than 120 milliseconds. The rsR' pattern observed in lead V1 indicates that there are two positive deflections, with the R wave being followed by a smaller R’ wave. This characteristic waveform is an important diagnostic feature of right bundle branch block and allows clinicians to distinguish it from other types of conduction abnormalities.

Understanding the morphology of the QRS complex, particularly in lead V1, is crucial in identifying the presence of a right bundle branch block and aids in the overall assessment of cardiac conduction system function.