Fascicular block (hemiblock): Left anterior & left posterior fascicular block

Fascicular block (hemiblock): Left anterior & left posterior fascicular block

Fascicular block (hemiblock): left anterior fascicular block & left posterior fascicular block Fascicular blocks were previously referred to as  hemiblocks,  but the latter term has been deprecated. The left bundle branch is subdivided into the following two fascicles: (1)  the anterior (anterosuperior) fascicle , which delivers the electrical impulse to the anterior wall of the left ventricle; (2)  the posterior (posteroinferior) fascicle , which delivers the electrical impulse to the posterior and inferior walls of the left ventricle. Anatomical or functional block in the anterior fascicle leads to left anterior fascicular block. Similarly, left posterior fascicular block is due to block in the posterior fascicle. Approximately 5–10% of all individuals have a third fascicle –  the median or centroseptal fascicle  – which gives off  Purkinje fibers  to the interventricular septum. Fascicular blocks occur due to anatomical or functional blocks in a fascicle. This alters the  ECG  curve in a cha…

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