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Dec 20, 2017

Know what a normal LBBB “looks” like:

1) QRS duration greater than 120 ms
2) Negative QRS Complex in V1
3) Positive QRS Complex in lateral leads (I, aVL, V5-V6)

LBBB causes a repolarization abnormality:

Consider a “repol” abnormality when there is a “general pattern of ST discordance”, meaning the ST...