also known as left anterior hemiblock, occurs when the anterior fascicle of the left bundle branch is no longer able to conduct action potentials. The criteria to diagnose a LAFB, or LAHB, on ECG ...

A left posterior fascicular block ― also known as a left posterior hemiblock, LPHB ― occurs on the ECG when the posterior fascicle of the left bundle branch is no longer able to conduct action ...