Bundle Branch Block

Question 1

LBBB and RBBB - QRS complex - over what width does it become a complete block?

Answer 1

QRS > 120ms = complete RBBB/LBBB

Question 2

QRS <120 ms - what does this mean

Answer 2

Incomplete RBBB/LBBB

Question 3

RBBB morphology on ECG:

What lead would you look at for the right side?

What do you look for when you get to this?

What shape is seen?

Answer 3

V1 QRS

M-shaped QRS complex

Question 4

LBBB morphology on ECG:

What wave in the QRS complex is missing?

Answer 4

Septal Q wave is missing