The criteria to diagnose a LAFB, or LAHB, on ECG include the following: Left axis deviation of at least -45 degrees The presence of a qR complex in lead I and a rS complex in lead III Usually a rS ...
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 ...
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