Introduction to 12-Lead ECG: The Art of Interpretation


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1: The axis in a LBBB can be a:

Normal axis

Right axis

Left axis

Any of the above

2: The most common axis in LBBB is:

Normal axis

Right axis

Left axis

Extreme right axis

3: If the QRS is wider than or equal to 0.12 seconds, it is an:

LBBB pattern

RBBB pattern

IVCD

Any one of the above

4: The QRS complexes in LBBBs are _____ in lead V₁.

positive

negative

variable

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