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Free Practice Quiz Question List

2 ECG Interpretation Fundamentals Online Quiz Questions

Use this free practice quiz with 20 questions to review 2 ECG Interpretation Fundamentals, test your knowledge, and prepare for your next test or exam.

20 questions
01
True or false
1 point

In an emergency, ECG interpretation should not delay immediate assessment or treatment of the patient.

  1. A

    True

  2. B

    False

02
Fill in the blank
1 point

At the standard paper speed of 25 mm/s25\ \text{mm/s}, one large horizontal box represents .

03
Written response
1 point

When reviewing ECG waveforms and segments, which named segment should you inspect for its appearance?

04
Written response
1 point

At a paper speed of 25 mm/s25\ \text{mm/s}, a QRS complex spans 33 small horizontal boxes. What is its duration in seconds? Enter the value to the nearest hundredth of a second.

05
Choose one
1 point

An ECG has a measured PR interval of 0.24 s0.24\ \text{s}. Which interpretation is supported by the common adult reference range?

  1. A

    It is within the common adult reference range.

  2. B

    It indicates delayed atrioventricular conduction.

  3. C

    It indicates delayed ventricular activation.

  4. D

    It is a corrected QT measurement.

06
Fill in the blank
1 point

A rhythm is regular, with consistent P waves before each QRS and a stable PR interval. This pattern is typically described as .

07
Written response
1 point

For a regular rhythm, consecutive R waves are 44 large boxes apart. Using 300300 divided by the number of large boxes, what is the approximate rate in beats per minute?

08
Choose one
1 point

An irregular rhythm has 88 QRS complexes in a 6-second strip. Using the 6-second method, what is the approximate average ventricular rate?

  1. A

    Approximately 8 beats/min8\ \text{beats/min}

  2. B

    Approximately 48 beats/min48\ \text{beats/min}

  3. C

    Approximately 80 beats/min80\ \text{beats/min}

  4. D

    Approximately 100 beats/min100\ \text{beats/min}

09
True or false
1 point

A typical 12-lead ECG often includes a rhythm strip that is about 10 seconds long.

  1. A

    True

  2. B

    False

10
Choose all
1 point

Which actions belong in a repeatable ECG reading sequence? Select all that apply.

  1. A

    Confirm the tracing quality and calibration before interpreting measurements.

  2. B

    Delay immediate patient assessment until every ECG measurement is complete.

  3. C

    Assess rate and rhythm, including regularity and P-to-QRS relationships.

  4. D

    Assume every tracing provides enough information to assess all 12-lead findings.

  5. E

    Measure PR, QRS, and QT/QTc when they are interpretable.

  6. F

    Compare with prior ECGs when available and summarize important findings.

11
Choose one
1 point

Why should a reader avoid assuming that one rhythm strip provides a complete assessment of all 12-lead findings?

  1. A

    A single rhythm strip always provides enough information to assess all findings from a 12-lead ECG.

  2. B

    A single rhythm strip may not provide enough information to assess all 12-lead findings.

  3. C

    A rhythm strip can be used only to assess paper speed and gain.

12
Choose all
1 point

Which statements about QT and QTc are supported? Select all that apply.

  1. A

    QT varies with heart rate, so clinicians commonly consider QTc rather than raw QT.

  2. B

    Automated QTc values should be checked against the tracing and clinical context.

  3. C

    QT has the same interpretation at every heart rate, so correction is unnecessary.

  4. D

    QT prolongation can be associated with risk of serious ventricular arrhythmia.

13
Open ended
1 point

Write a concise one-sentence ECG description for a tracing with a regular rhythm, a ventricular rate of approximately 75 beats/min75\ \text{beats/min}, a consistent P wave before each narrow QRS, and a PR interval of about 0.16 s0.16\ \text{s}. Do not infer findings that are not provided.

14
Choose one
1 point

A tracing is recorded at the standard paper speed of 25 mm/s. How much time does a span of three large boxes represent?

  1. A

    0.20 s

  2. B

    0.60 s

  3. C

    1.00 s

  4. D

    1.20 s

15
Written response
1 point

In the repeatable ECG reading sequence, which step comes immediately after measuring intervals?

16
True or false
1 point

True or false: Because the QT interval varies with heart rate, clinicians commonly consider QTc and check automated QTc values against the tracing and clinical context.

  1. A

    True

  2. B

    False

17
Choose one
1 point

On a regular rhythm, consecutive R waves are four large boxes apart. What is the approximate heart rate?

  1. A

    60 beats/min

  2. B

    70 beats/min

  3. C

    75 beats/min

  4. D

    120 beats/min

18
Choose one
1 point

An irregular rhythm strip contains nine QRS complexes in six seconds. What average ventricular rate does the recommended estimate give?

  1. A

    60 beats/min

  2. B

    90 beats/min

  3. C

    100 beats/min

  4. D

    150 beats/min

19
Choose one
1 point

An ECG has a PR interval of 0.24 s. Which interpretation is supported by this measurement?

  1. A

    Delayed atrioventricular conduction

  2. B

    A normal PR interval

  3. C

    A QT interval that is independent of heart rate

  4. D

    A finding that by itself establishes a specific rhythm diagnosis

20
Choose one
1 point

A QRS duration measures 0.14 s. Which conclusion best follows from the common adult reference information?

  1. A

    It is within the usual QRS duration reference, so no context is needed.

  2. B

    It proves that the rhythm is sinus.

  3. C

    It is widened and indicates delayed or abnormal ventricular activation that needs contextual interpretation.

  4. D

    It means the PR interval is prolonged.