studentparamedics:

You can distinguish between Left Bundle Branch Block and Right Bundle Branch Block simply by looking at the QRS morphology in V1 and V6.If the QRS looks like W in V1 and M in V6 it is LBBB. (WiLLiaM)If the QRS looks like M in V1 and W in V6 it is RBBB. (MoRRoW)studentparamedics:You can distinguish between Left Bundle Branch Block and Right Bundle Branch Block simply by looking at the QRS morphology in V1 and V6.If the QRS looks like W in V1 and M in V6 it is LBBB. (WiLLiaM)If the QRS looks like M in V1 and W in V6 it is RBBB. (MoRRoW)