1. In an ectopic atrial rhythm, the primary pacemaker is found in the inferior part of the atria. It is always near the AV node. True or False.
2. The P-wave morphology in an ectopic atrial rhythm is always inverted in leads II, III, and aVF. True or False.
3. In an ectopic atrial rhythm, the P-wave morphology in leads II, III, and aVF:
A. May be inverted
B. May be upright
C. Is always different from the morphology of the sinus P wave
D. All of the above
4. For simplicity, the PR interval in an ectopic atrial rhythm:
A. Is greater than or equal to 0.12 seconds
B. Is always less than 0.12 seconds
C. May be prolonged
D. Both A and C
5. The QRS morphology and the interval involved should be exactly the same when the patient is in an ectopic atrial rhythm as when the patient is in normal sinus rhythm. In some cases, however, rate-related aberrancy may develop. True or False.
6. If the patient normally has a wide QRS complex because of either a left or right bundle branch block, an ectopic atrial rhythm will also show the same bundle branch block pattern. True or False.
7. Ectopic atrial rhythms are easily diagnosed based on P-wave morphology. True or False.
8. Which of the following is useful in determining an ectopic atrial rhythm?
A. The PR segment
B. P-wave morphology
C. QT interval
D. PR interval
E. Both B and D
Find the correct match:
9. Inverted P wave, PR interval of 0.20 seconds
A. Ectopic atrial rhythm
B. Junctional rhythm
C. Normal sinus rhythm
10. Inverted P wave, PR interval of 0.10 seconds
A. Ectopic atrial rhythm
B. Junctional rhythm
C. Normal sinus rhythm