RBBB stands for which conduction abnormality?

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Multiple Choice

RBBB stands for which conduction abnormality?

Explanation:
RBBB stands for Right Bundle Branch Block, a conduction abnormality in which the right bundle branch of the heart’s His-Purkinje system is slowed or blocked. Because the right ventricle loses its rapid, synchronized activation, the ventricles depolarize in a delayed sequence, producing a longer QRS duration (typically >120 ms) and a characteristic ECG pattern such as an rsR’ (the “bunny ears”) in the right precordial leads (V1–V2) with broad S waves in the left-sided leads. The other choices aren’t standard cardiac conduction terms—basilar or brachial blocks aren’t recognized as heart conduction abnormalities—and left bundle branch block would be labeled differently as LBBB.

RBBB stands for Right Bundle Branch Block, a conduction abnormality in which the right bundle branch of the heart’s His-Purkinje system is slowed or blocked. Because the right ventricle loses its rapid, synchronized activation, the ventricles depolarize in a delayed sequence, producing a longer QRS duration (typically >120 ms) and a characteristic ECG pattern such as an rsR’ (the “bunny ears”) in the right precordial leads (V1–V2) with broad S waves in the left-sided leads. The other choices aren’t standard cardiac conduction terms—basilar or brachial blocks aren’t recognized as heart conduction abnormalities—and left bundle branch block would be labeled differently as LBBB.

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