A left anterior fascicular block can also occur in the setting of a bifascicular or trifascicular block. Below is a bifascicular block with a LAFB on ECG. Note there is also a right bundle branch ...

LPHB ― occurs on the ECG when the posterior fascicle of the left bundle branch is no longer able to conduct action potentials. This is much less common than a left anterior fascicular block, or ...

left anterior fascicular block and atrial fibrillation. Several common heritable cardiomyopathies including HCM, ARVC and familial dilated cardiomyopathy may present with ECG abnormalities prior to ...