Hemiblocks

Question 1

EKG findings with LBBB where the L anterior fascicle blocked

Answer 1

• small r w/ deep S in II, III, aVF
• small q with tall R in I and aVL
• wide QRS
• LAD

Question 2

generally describe LBBB where the L anterior fascicle is blocked

Answer 2

• depolarization starts at L posterior fascicle
• movement is directed inferior and posterior

Question 3

EKG findings of LBBB with L posterior fascicle block

4

Answer 3

• small r with deep S in I and aVL
• small q with tall R in II, III, aVF
• +/- QRS widening
• RAD

Question 4

general info on LBBB with L posterior fascicle block

2

Answer 4

• depolarization begins in the L anterior fascicle
• movement is superior and anterior

Question 5

generally where to look for:
* L anterior fascicular block
* L posterior fascicular block

Answer 5

• lead I
• aVF