Feb 18, 2025 · In left anterior fascicular block (LAFB), impulses are conducted to the left ventricle via the posterior fascicle, producing characteristic ECG changes

May 24, 2022 · A left anterior fascicular block is the term for something interfering with your heartbeat’s signal when it gets to the left anterior fascicle of your heart’s left bundle branch. This makes your heart’s left ventricle contract later than your heart’s right ventricle.

Nov 18, 2024 · Left anterior fascicular block (LAFB), a pattern (formerly called left anterior hemiblock) seen on the surface electrocardiogram (ECG), results when normal electrical activity in the His-Purkinje system is delayed or interrupted.

LAFB — which is also known as left anterior hemiblock (LAHB) — occurs when a cardiac impulse spreads first through the left posterior fascicle, causing a delay in activation of the anterior and upper parts of the LV.

ECG criteria for left anterior fascicular block (LAFB) Electrical axis between -45° to -90°. If the electrical axis is -30° to -45, probable LAFB may be diagnosed.

Mar 17, 2025 · Left fascicular blocks, also called left hemiblocks, are conduction disturbances in one of two fascicles of the left bundle branch. The left bundle branch is divided into two fascicles, the anterior fascicle and the posterior fascicle.

An ECG Left Anterior Fascicular Block (LAFB) is a heart condition. It shows up on an electrocardiogram. It means the heart's electrical system is not working right in the left anterior fascicle of the left bundle branch.

The criteria to diagnose a LAFB, or LAHB, on ECG include the following: A very quick way to diagnose a left anterior fascicular block on ECG is to first identify the left axis deviation;...

Feb 3, 2021 · Left anterior fascicular block (LAFB) or Left anterior hemiblock (LAH) is a type of unifascicular block of left bundle branch with typical ECG pattern – left axis deviation; ECG features

Disruption of both fascicles produces the familiar left bundle branch block (LBBB) pattern, but each fascicle can be affected independently – resulting in either left anterior fascicular block (LAFB) or left posterior fascicular block (LPFB).