Bundle Branch Blocks (Johnston)

Question 1

Which side of the septum is activated first in RBBB?

Answer 1

Left side

Question 2

When can you have a late intrinsic deflection?

Answer 2

Bundle branch block

Hypertrophy/dilated

Question 3

LBBB is more apt to occur with:

Answer 3

AORTIC STENOSIS
CARDIOMYOPATHY
HTN
Ischemia

Question 4

Describe the T wave in BBB

Answer 4

Polarity is opposite QRS direction

Due to BBB, there is disturbance in depolarization-repolarization

Question 5

If T wave polarity is in the same direction of the QRS complex, it is called a ___ T wave change and usually d/t ischemia (this is regarding T wave in BBB)

Answer 5

Primary