Cardiac Nursing Quiz: ECG Rhythm Interpretation

1. Which ECG finding is characteristic of normal sinus rhythm?

PR interval 0.12–0.20 seconds, one P wave per QRS

PR interval >0.20 seconds, irregular QRS complexes

Absent P waves, wide QRS complexes

Multiple P waves before each QRS complex

2. A patient presents with a heart rate of 145 bpm, narrow QRS complexes, and a regular rhythm. What is the most likely diagnosis?

Atrial fibrillation

Supraventricular tachycardia

Ventricular tachycardia

Sinus bradycardia

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4. What is the normal duration of the QT interval?

0.12–0.20 seconds

0.36–0.44 seconds

>0.50 seconds

5. A patient exhibits a rhythm with a rate of 35 bpm and normal PR interval. Which term best describes this condition?

Sinus bradycardia

Heart block

Atrial flutter

Premature ventricular contraction

6. Which arrhythmia is characterized by a sawtooth pattern on the ECG?

Atrial fibrillation

Atrial flutter

Ventricular fibrillation

Sinus tachycardia

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8. A wide QRS complex rhythm with a rate of 180 bpm in an unstable patient is most consistent with which diagnosis?

Atrial fibrillation with rapid ventricular response

Ventricular tachycardia

Supraventricular tachycardia with aberrancy

Sinus tachycardia

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10. Which finding on ECG is consistent with acute myocardial infarction?

ST segment elevation in contiguous leads

Shortened PR interval

Prolonged QT interval only

Peaked T waves in all leads

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12. In complete heart block (third-degree AV block), which statement is true?

P waves and QRS complexes occur at independent rates

All P waves are followed by QRS complexes

PR interval is progressively prolonged

QRS complexes are narrow and regular

13. Which electrolyte abnormality is classically associated with peaked T waves on the ECG?

Hypokalemia

Hyperkalemia

Hypocalcemia

Hypomagnesemia

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15. A rhythm strip shows irregular QRS complexes without visible P waves and a ventricular rate of 110 bpm. What is the most likely diagnosis?

Atrial fibrillation with rapid ventricular response

Sinus arrhythmia

Atrial flutter with variable conduction

Premature atrial contractions

Cardiac Nursing Quiz: Can You Read Every ECG Rhythm?

1. Which ECG finding is characteristic of normal sinus rhythm?

2.

What first name or nickname would you like us to use?

2. A patient presents with a heart rate of 145 bpm, narrow QRS complexes, and a regular rhythm. What is the most likely diagnosis?

3. In atrial fibrillation, the ECG typically shows ____ instead of distinct P waves.

4. What is the normal duration of the QT interval?

5. A patient exhibits a rhythm with a rate of 35 bpm and normal PR interval. Which term best describes this condition?

6. Which arrhythmia is characterized by a sawtooth pattern on the ECG?

7. In second-degree AV block Type II (Mobitz II), the ECG shows ____ followed by a dropped QRS complex.

8. A wide QRS complex rhythm with a rate of 180 bpm in an unstable patient is most consistent with which diagnosis?

9. The ST segment represents the period between ____ and the beginning of the T wave.

10. Which finding on ECG is consistent with acute myocardial infarction?

11. A premature beat that originates from the ventricles will produce a ____ QRS complex on the ECG.

12. In complete heart block (third-degree AV block), which statement is true?

13. Which electrolyte abnormality is classically associated with peaked T waves on the ECG?

14. Asystole on the ECG appears as a ____ line with no electrical activity.

15. A rhythm strip shows irregular QRS complexes without visible P waves and a ventricular rate of 110 bpm. What is the most likely diagnosis?