Cardiac Dysrhythmias Advanced Questions with kk kk kk kk
Correct Answers 2025 kk kk kk
1. What is the pacemaker of the heart normally?
kk kk kk kk kk kk kk Correct ans kk -
SA Node. Where does the SA node originate?
kk kk kk kk kk kk kk kk Correct ans kk -
Upper right atrium. What is the pathway of conduction in the heart?
kk kk kk kk kk kk kk kk kk kk kk kk
Correct ans - SA node kk k k kk
➔ atria -> AV node -> bundle of his -> bundle branches -
kk kk kk kk kk kk kk kk kk kk kk kk
> purkinje fibers -> ventricles.
kk kk kk kk
2. What does stimulation of the vagus nerve cause?
kk Correct ans - kk kk kk kk kk kk kk
Decreased firing of the SA node and slowed impulse conduction of the AV
kk kk kk kk kk kk kk kk kk kk kk kk kk
node.
kk
3. What does stimulation of the sympathetic nerves cause?
kk Correct ans - kk kk kk kk kk kk kk k k
Increased firing of the SA node and increased impulse through the AV node, a
kk kk kk kk kk kk kk kk kk kk kk kk kk kk
nd cardiac contractility.
kk kk kk
4. What does the P wave represent? kk Correct ans - kk kk kk kk k k k k k k kk k k k k k k
Time for the passage of the electrical impulse through the atrium causing atri
kk kk kk kk kk kk kk kk kk kk kk kk
al depolarization (contraction).
kk kk kk
5. What is the normal P wave duration? kk kk kk kk kk kk Correct ans kk k k k k - k k 0.06 - 0.12. kk kk
6. What is a possible variation cause of a P wave?
kk kk kk kk kk kk kk kk kk Correct ans kk -
Disturbance in conduction within the atria.
kk kk kk kk kk kk
7. What does the PR interval represent? kk Correct ans - kk kk kk kk k k k k k k kk k k k k k k
The measure from the beginning of the P wave to the beginning of the QRS co
kk kk kk kk kk kk kk kk kk kk kk kk kk kk kk
mplex, represents time taken for impulse to spread through the atria, AV node, a
kk kk kk kk kk kk kk kk kk kk kk kk kk kk
nd bundle of his, the bundle branches and purkinje fibers, to a point of immediat
kk kk kk kk kk kk kk kk kk kk kk kk kk kk kk
ely preceding ventricular contraction.
kk kk kk kk
8. What is the normal PRUinterval? kk kk kk kk Correct ans kk k k k k - k k 0.12 - 0.20. kk kk
9. What is a possible variation cause with PR interval?
kk kk Correct ans
kk - kk kk kk kk kk kk
Disturbance in conduction usually in the AV node, bundle of his, or bundle
kk kk kk kk kk kk kk kk kk kk kk kk kk
branches but can be atria as well.
kk kk kk kk kk kk kk
10. What does the QRS interval represent? kk Correct ans - kk kk kk kk k k k k kk k k
Measure from beginning to end of QRS complex, represent time taken for d
kk kk kk kk kk kk kk kk kk kk kk kk
epolarization (contraction) of both ventricles (systole).
kk kk kk kk kk kk
11. What is the normal QRS interval? kk kk kk kk kk Correct ans kk k k k k - k k <0.12.
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kk k k k k kk k k kk k k k k k k k k k k
GMT -
k k k k
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, 12. What is a possible variation cause with the QRS interval?
kk kk kk Correct ans kk kk kk kk kk kk kk -
Disturbance in conduction in the bundle branches or in the ventricles.
kk kk kk kk kk kk kk kk kk kk kk
13. What does the ST Segment represent?kk Correct ans - kk kk kk kk k k k k k k k k kk k k k k k k
Measure from the S wave of the QRS complex to the beginning of the T wave;
kk kk kk kk kk kk kk kk kk kk kk kk kk kk kk
represents time between ventricular depolarization and repolarization (Diastole);
kk kk kk kk kk kk kk kk
should be isoelectric (flat).
kk kk kk kk
14. What is the normal ST segment? kk kk kk kk kk k k k k Correct ans kk k k k k k k - 0.12. k k
15. What is a possible variation cause with the ST segment?
kk kk kk kk kk kk kk kk kk Correct ans kk -
Disturbance usually caused by ischemia, injury or infarction.
kk kk kk kk kk kk kk kk
16. What does the T wave represent? kk Correct ans - kk kk kk kk k k k k k k kk k k k k k k
Represents time for ventricular repolarization, should be upright. kk kk kk kk kk kk kk
17. What is the normal T wave? kk kk kk kk kk k k k k Correct ans kk k k k k k k - k k 0.16.
18. What is a possible variation cause for a T wave?
kk kk Correct ans -
kk kk kk kk kk kk kk kk k k
Disturbance usually caused by electrolyte disturbances; ischemia or i
kk kk kk kk kk kk kk kk kk
nfarction.
kk
19. What does the QT interval represent?
kk Correct ans - kk kk kk kk k k k k k k kk k k k k k k
Measured from beginning of the QRS to end of the T wave, represents time t aken
kk kk kk kk kk kk kk kk kk kk kk kk kk kk kk
for entire electrical depolarization and repolarization of the ventricles.
kk kk kk kk kk kk kk kk kk
20. What is the normal QT interval? kk kk kk kk kk Correct ans kk - k k 0.34 - 0.43. kk kk
21. What is the possible variation cause for a QT interval?
kk kk Correct ans -
kk kk kk kk kk kk kk kk
Disturbance usually affected repolarization more than depolarization and ca
kk kk kk kk kk kk kk kk kk
use by drugs, electrolyte imbalances, and change in hr.
kk kk kk kk kk kk kk kk kk
22. What is the normal firing of the SA Node?
kk kk kk kk kk kk kk kk Correct ans kk - 60 - k k kk
100 times/min.
kk kk
23. What is the normal firing of the AV Node?
kk kk kk kk kk kk kk kk Correct ans kk - 40 -
k k kk
60 times/min.
kk kk
24. What is the normal firing of the Bundle of HIS/Purkinje Fibers?
kk kk kk kk kk kk kk kk kk kk
Correct
ans - 20 - k k kk
40 times/min. kk
25. What are the characteristics of Normal Sinus Rhythm?
kk kk kk kk kk kk kk Correct ans kk -
60 - 100 bpm, regular, normal P wave/PR and QRS.
kk kk kk kk kk kk kk kk kk kk
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kk k k k k kk k k kk k k k k k k k k k k
GMT -
k k k k
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Correct Answers 2025 kk kk kk
1. What is the pacemaker of the heart normally?
kk kk kk kk kk kk kk Correct ans kk -
SA Node. Where does the SA node originate?
kk kk kk kk kk kk kk kk Correct ans kk -
Upper right atrium. What is the pathway of conduction in the heart?
kk kk kk kk kk kk kk kk kk kk kk kk
Correct ans - SA node kk k k kk
➔ atria -> AV node -> bundle of his -> bundle branches -
kk kk kk kk kk kk kk kk kk kk kk kk
> purkinje fibers -> ventricles.
kk kk kk kk
2. What does stimulation of the vagus nerve cause?
kk Correct ans - kk kk kk kk kk kk kk
Decreased firing of the SA node and slowed impulse conduction of the AV
kk kk kk kk kk kk kk kk kk kk kk kk kk
node.
kk
3. What does stimulation of the sympathetic nerves cause?
kk Correct ans - kk kk kk kk kk kk kk k k
Increased firing of the SA node and increased impulse through the AV node, a
kk kk kk kk kk kk kk kk kk kk kk kk kk kk
nd cardiac contractility.
kk kk kk
4. What does the P wave represent? kk Correct ans - kk kk kk kk k k k k k k kk k k k k k k
Time for the passage of the electrical impulse through the atrium causing atri
kk kk kk kk kk kk kk kk kk kk kk kk
al depolarization (contraction).
kk kk kk
5. What is the normal P wave duration? kk kk kk kk kk kk Correct ans kk k k k k - k k 0.06 - 0.12. kk kk
6. What is a possible variation cause of a P wave?
kk kk kk kk kk kk kk kk kk Correct ans kk -
Disturbance in conduction within the atria.
kk kk kk kk kk kk
7. What does the PR interval represent? kk Correct ans - kk kk kk kk k k k k k k kk k k k k k k
The measure from the beginning of the P wave to the beginning of the QRS co
kk kk kk kk kk kk kk kk kk kk kk kk kk kk kk
mplex, represents time taken for impulse to spread through the atria, AV node, a
kk kk kk kk kk kk kk kk kk kk kk kk kk kk
nd bundle of his, the bundle branches and purkinje fibers, to a point of immediat
kk kk kk kk kk kk kk kk kk kk kk kk kk kk kk
ely preceding ventricular contraction.
kk kk kk kk
8. What is the normal PRUinterval? kk kk kk kk Correct ans kk k k k k - k k 0.12 - 0.20. kk kk
9. What is a possible variation cause with PR interval?
kk kk Correct ans
kk - kk kk kk kk kk kk
Disturbance in conduction usually in the AV node, bundle of his, or bundle
kk kk kk kk kk kk kk kk kk kk kk kk kk
branches but can be atria as well.
kk kk kk kk kk kk kk
10. What does the QRS interval represent? kk Correct ans - kk kk kk kk k k k k kk k k
Measure from beginning to end of QRS complex, represent time taken for d
kk kk kk kk kk kk kk kk kk kk kk kk
epolarization (contraction) of both ventricles (systole).
kk kk kk kk kk kk
11. What is the normal QRS interval? kk kk kk kk kk Correct ans kk k k k k - k k <0.12.
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kk k k k k kk k k kk k k k k k k k k k k
GMT -
k k k k
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, 12. What is a possible variation cause with the QRS interval?
kk kk kk Correct ans kk kk kk kk kk kk kk -
Disturbance in conduction in the bundle branches or in the ventricles.
kk kk kk kk kk kk kk kk kk kk kk
13. What does the ST Segment represent?kk Correct ans - kk kk kk kk k k k k k k k k kk k k k k k k
Measure from the S wave of the QRS complex to the beginning of the T wave;
kk kk kk kk kk kk kk kk kk kk kk kk kk kk kk
represents time between ventricular depolarization and repolarization (Diastole);
kk kk kk kk kk kk kk kk
should be isoelectric (flat).
kk kk kk kk
14. What is the normal ST segment? kk kk kk kk kk k k k k Correct ans kk k k k k k k - 0.12. k k
15. What is a possible variation cause with the ST segment?
kk kk kk kk kk kk kk kk kk Correct ans kk -
Disturbance usually caused by ischemia, injury or infarction.
kk kk kk kk kk kk kk kk
16. What does the T wave represent? kk Correct ans - kk kk kk kk k k k k k k kk k k k k k k
Represents time for ventricular repolarization, should be upright. kk kk kk kk kk kk kk
17. What is the normal T wave? kk kk kk kk kk k k k k Correct ans kk k k k k k k - k k 0.16.
18. What is a possible variation cause for a T wave?
kk kk Correct ans -
kk kk kk kk kk kk kk kk k k
Disturbance usually caused by electrolyte disturbances; ischemia or i
kk kk kk kk kk kk kk kk kk
nfarction.
kk
19. What does the QT interval represent?
kk Correct ans - kk kk kk kk k k k k k k kk k k k k k k
Measured from beginning of the QRS to end of the T wave, represents time t aken
kk kk kk kk kk kk kk kk kk kk kk kk kk kk kk
for entire electrical depolarization and repolarization of the ventricles.
kk kk kk kk kk kk kk kk kk
20. What is the normal QT interval? kk kk kk kk kk Correct ans kk - k k 0.34 - 0.43. kk kk
21. What is the possible variation cause for a QT interval?
kk kk Correct ans -
kk kk kk kk kk kk kk kk
Disturbance usually affected repolarization more than depolarization and ca
kk kk kk kk kk kk kk kk kk
use by drugs, electrolyte imbalances, and change in hr.
kk kk kk kk kk kk kk kk kk
22. What is the normal firing of the SA Node?
kk kk kk kk kk kk kk kk Correct ans kk - 60 - k k kk
100 times/min.
kk kk
23. What is the normal firing of the AV Node?
kk kk kk kk kk kk kk kk Correct ans kk - 40 -
k k kk
60 times/min.
kk kk
24. What is the normal firing of the Bundle of HIS/Purkinje Fibers?
kk kk kk kk kk kk kk kk kk kk
Correct
ans - 20 - k k kk
40 times/min. kk
25. What are the characteristics of Normal Sinus Rhythm?
kk kk kk kk kk kk kk Correct ans kk -
60 - 100 bpm, regular, normal P wave/PR and QRS.
kk kk kk kk kk kk kk kk kk kk
This study source was downloaded by 100000894421506 from CourseHero.com on 01-17-2025 19:29:01
kk k k k k kk k k kk k k k k k k k k k k
GMT -
k k k k
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