1. The entire ECG is:
A. 3 seconds long
B. 6 seconds long
C. 9 seconds long
D. Variable
E. None of the above
2. The electrical axis is the sum total of all the vectors generated by the action potentials of all of the ventricular myocytes. True or False.
3. Which one is correct when we refer to the normal quadrant?
A. Lead I is positive.
B. Lead aVF is positive.
C. Both A and B are correct.
D. None of the above
4. Which one is correct when we refer to the left quadrant?
A. Lead I is negative.
B. Lead aVF is positive.
C. Both A and B are correct.
D. None of the above
5. Which one is correct when we refer to the right quadrant?
A. Lead I is negative.
B. Lead aVF is negative.
C. Both A and B are correct.
D. None of the above
6. Which one is correct when we refer to the extreme right quadrant?
A. Lead I is negative.
B. Lead aVF is negative.
C. Both A and B are correct.
D. None of the above
7. Because all RSR’ complexes are close in appearance, all you need to diagnose RBBB is to identify their presence in V1. True or False.
8. The three major criteria for diagnosing RBBB include:
A. QRS ≥ 0.12 seconds
B. Slurred S wave in leads I and V6
C. RSR’ pattern in V1
D. All of the above
E. None of the above
9. In RBBB, there can be a negative complex in V1 or V2. True or False.
10. The major criteria for diagnosing LBBB include:
A. QRS ≥ 0.12 seconds
B. Broad, monomorphic S wave in leads I and V6
C. Broad, monomorphic R wave in V1
D. All of the above
E. None of the above