1. The main pacemaker for a patient with sinus bradycardia is:
A. SA node
B. Ectopic atrial
C. AV node
D. Either A or B
2. In sinus bradycardia, the atrial rate must be ____________ 60 BPM.
3. In sinus bradycardia, the main pacemaker is firing at a slow rate. For some patients, this slower rate can be normal. It is also seen normally in athletic individuals and in patients during sleep. True or False.
4. In sinus bradycardia, the entire complex is broader, leading to a slower rate. True or False.
5. What phase of the action potential is lengthened in sinus bradycardia?
A. Phase 1
B. Phase 2
C. Phase 3
D. Phase 4
6. A slightly prolonged QT interval and QTc are considered normal in sinus bradycardia. True or False.
7. The main electrocardiographic segment that is lengthened in sinus bradycardia is (pick the best one):
A. PR interval
B. QRS interval
C. QT interval
D. QTc
8. The P wave should be upright in leads ____________, ____________,and ____________ in any sinus beat.
9. Myocardial infarctions can lead to sinus bradycardia. True or False.
10. Hemodynamically significant sinus bradycardia in a patient having an acute myocardial infarction should not be treated because they will get better as the patient’s ischemia resolves. True or False.