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=== | ===LAFB=== | ||
[[Image:LAHB.png|thumb| Left anterior hemiblock]] | [[Image:LAHB.png|thumb| Left anterior hemiblock]] | ||
;Criteria for left anterior fascicular block | |||
:left axis deviation (<-30°) | |||
:no or very small S in lead I | |||
:normal small q in lead I | |||
:S > R in leads II and III | |||
:no or very few QRS widening | |||
In ''left anterior fascicular block'' the anterior part (fascicle) of the left bundle is slow. This results in delayed depolarisation of the upper anterior part of the left ventricle. On the ECG this results in left axis deviation. The QRS width is <0,12 seconds in isolated LAFB. | |||
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