**ECG/EKG basic interpretation quiz** for nurses!

This quiz will test your knowledge on how to analyze the PQRST complex on an ECG strip. You will be required to identify where atrial and ventricular depolarization and repolarization occur in the PQRST complex along with how the electrical conduction system works within the heart to cause the heart to contract.

As the nurse, it is important you are familiar with how to count the rate, determine if the rhythm is regular, measure the PR interval, QRS complexes, and how normal p-waves, ST segments, and t-waves should look.

If you are interested in learning more about ECG/EKG interpretation check out the series on YouTube. Don’t forget to review the ECG notes before taking this quiz.

## ECG/EKG Interpretation Basics Quiz for Nurses

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## ECG/EKG Interpretation Basics Quiz for Nurses

1. When heart muscle cells are in the resting state they have what type of charge?

A. Negative

B. Positive

C. Neutral

D. Depolarized

The answer is A: negative

2. The process that causes a heart cell to contract is known as?

A. Repolarization

B. Polarization

C. Depolarization

The answer is C: Depolarization

3. When a heart muscle cell goes back into its negatively charged state, or in other words, when it relaxes this is known as?

A. Repolarization

B. Polarization

C. Depolarization

The answer is A: repolarization

4. Which part of the electrical conduction system is located in the upper part of the right atrium and is responsible for atrial depolarization?

A. AV node

B. Bundle of His

C. Purkinje Fibers

D. SA node

The answer is D: SA node

5. Once electrical signals pass through the Bundle of His, they next travel to?

A. AV node

B. Bundle branches

C. SA node

D. Purkinje Fibers

The answer is B: bundle branches

6. Select the characteristics of the AV node: (select all that apply)

A. It is known as the pacemaker.

B. It causes a delay in electrical signal transfer so the atria can fully empty into the ventricles.

C. It’s known as the gatekeeper.

D. It fires and sends impulses to cause atrial depolarization of the right and left atria.

E. It’s found in the lower part of the right atrium just above the tricuspid valve.

F. It’s found in the upper part the right atrium.

The answers are: B, C, and E

7. On an EKG/ECG strip each small square represents how many seconds of time?

A. 0.20 second

B. 0.02 seconds

C. 0.12 seconds

D. 0.04 seconds

The answer is D: 0.04 seconds

8. The nurse is assessing an ECG strip and counts 30 LARGE squares. How many seconds of time did the nurse count?

A. 30 seconds

B. 10 seconds

C. 6 seconds

D. 60 seconds

The answer is C: 6 seconds

9. Which part of the PQRST complex represents atrial depolarization?

A. P-wave

B. QRS complex

C. T-wave

D. ST segment

The answer is A: p-wave

10. The nurse is assessing an ECG strip and begins measuring at the beginning of the p-wave to the beginning of the QRS complex. What is the nurse measuring?

A. P-wave

B. ST segment

C. PR interval

D. PR segment

The answer is C: PR interval

11. Which part of the PQRST complex represents ventricular depolarization?

A. P-wave

B. QRS complex

C. T-wave

D. ST segment

The answer is B: QRS complex

12. Which part of PQRST complex represents ventricular repolarization?

A. QRS complex

B. ST segment

C. T-wave

D. P-wave

The answer is C: T-wave

13. What is the point where the QRS complex meets the ST segment?A. R-point

B. PR interval

C. QT interval

D. J-point

The answer is D: J-point

14. A normal PR interval should measure between?

A. 0.04-0.12 seconds

B. 0.20-0.36 seconds

C. 0.12-0.20 seconds

D. 0.35-0.40 seconds

The answer is C: 0.12-0.20 seconds

15. Select all the characteristics a normal p-wave should have?

A. One p-wave should accompany a QRS complex.

B. They should measure more than 0.36 seconds in duration.

C. P-waves should be flat.

D. P-waves should be round and upright.

E. Multiple p-waves can accompany a QRS complex.

The answers are A and D.

16. A QRS complex should measure no more than?

A. 0.20 seconds

B. 0.12 seconds

C. 0.08 seconds

D. 0.04 seconds

The answer is B: 0.12 seconds

17. Use the figure at the top of the quiz to answer the next few questions: What is the atrial rate?

A. 100

B. 90

C. 80

D. 60

The answer is C: 80

18. What is the ventricular rate?

A. 100

B. 90

C. 80

D. 60

The answer is C: 80

19. What is the approximate measurement of the PR interval?

A. 0.12 seconds

B. 0.20 seconds

C. 0.04 seconds

D. 0.08 seconds

The answer is A: 0.12 seconds

20. What is the approximate measurement of the QRS complex?

A. 0.12 seconds

B. 0.20 seconds

C. 0.04 seconds

D. 0.08 seconds

The answer is D: 0.08 seconds

21. What is your interpretation of the rhythm above?

A. First degree heart block

B. Normal sinus rhythm

C. Sinus tachycardia

D. Atrial fibrillation

The answer is B: Normal Sinus Rhythm

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