Left Anterior Fascicular Block
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Heart Block -> Left Anterior Fascicular Block
Left Anterior Fascicular Block Definition
An impairment of transmission of the cardiac electrical impulse along the fibers of the left anterior fascicle. In left anterior fascicular block (LAFB) the posteroinferior regions of the left ventricular endocardium are activated abnormally before the anterosuperior left ventricular area. After emerging from the posteroinferior division of the left bundle branch, the impulse first propagates in an inferior, rightward, and usually anterior direction for a short period of time. This orientation is responsible for the small q waves in leads I and aVL and for the r waves in leads II, III, and aVF.
Left Anterior Fascicular Block Synonyms
Left Anterior Fascicular Block, LAFB, LEFT ANTERIOR FASCICULAR BLOCK, Left Anterior Hemiblock, Left anterior fascicular block
Terms in Left Anterior Fascicular Block category
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