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Bifascicular block

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Bifascicular block

Bifascicular block
Classification and external resources
ICD-10 I45.2
ICD-9 426.53

Bifascicular block is a conduction abnormality in the heart where two of the three main fascicles of the His/Purkinje system are blocked.

Most commonly, it refers to a combination of right bundle branch block (RBBB) and either left anterior fascicular block (LAFB) or left posterior fascicular block (LPFB), with the former being more common.[1]

Some authors consider left bundle branch block (LBBB) to be a technical bifascicular block, since the block occurs above the bifurcation of the left anterior and left posterior fascicles of the left bundle branch.

Treatment

In those with bifascicular block and no symptoms, little with respect to treatment is needed. In those with syncope, a pacemaker is recommended.

References

  1. ^ "Lesson VI - ECG Conduction Abnormalities". Archived from the original on 16 January 2009. Retrieved 2009-01-07. 

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