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1 ECG Fundamentals and a Systematic Reading Method Online Quiz Questions

Use this free practice quiz with 20 questions to review 1 ECG Fundamentals and a Systematic Reading Method, test your knowledge, and prepare for your next test or exam.

20 questions
01
True or false
1 point

True or false: An ECG tracing by itself determines what treatment a patient should receive.

  1. A

    True

  2. B

    False

02
Fill in the blank
1 point

To position chest lead V3, place it .

03
Fill in the blank
1 point

At a standard paper speed of 25 mm/s, one small horizontal box represents seconds.

04
Written response
1 point

At standard paper speed, a regular rhythm has three large boxes between consecutive R waves. Using 300÷3300 \div 3, what is the estimated ventricular rate? Enter a value in beats per minute.

05
Choose one
1 point

An ECG rhythm is irregular. Which method is appropriate for estimating the ventricular rate?

  1. A

    Use 300 divided by the number of large boxes between two consecutive R waves.

  2. B

    Count QRS complexes in a 10-second recording and multiply by six.

  3. C

    Count P waves in a 10-second recording and divide by six.

  4. D

    Use the interval between the first and last QRS complex without considering the recording duration.

06
True or false
1 point

True or false: A QRS duration under 120 ms is generally considered narrow.

  1. A

    True

  2. B

    False

07
Written response
1 point

What is the name of the interval measured from the beginning of the QRS to the end of the T wave?

08
Choose one
1 point

When placing the chest electrodes, where should V6 be positioned?

  1. A

    Fourth intercostal space at the right sternal border.

  2. B

    Fifth intercostal space at the midclavicular line.

  3. C

    Level with V4 at the midaxillary line.

  4. D

    Level with V4 at the anterior axillary line.

09
True or false
1 point

True or false: In a systematic ECG reading sequence, verify tracing quality and lead placement before assessing rate and rhythm.

  1. A

    True

  2. B

    False

10
Choose all
1 point

Select all statements that correctly pair ECG lead groups with the regions they view.

  1. A

    Leads II, III, and aVF view the inferior region.

  2. B

    Leads I and aVL view the high lateral region.

  3. C

    Leads V1 and V2 view the anterior region.

  4. D

    Leads V3 and V4 view the anterior region.

  5. E

    Leads V5 and V6 view the septal region.

11
Choose one
1 point

Using the quick limb-lead quadrant check, how should you describe an ECG with a predominantly negative QRS in lead I and a predominantly positive QRS in aVF?

  1. A

    Usually a normal axis.

  2. B

    A rightward axis.

  3. C

    A possible leftward axis; inspect lead II.

  4. D

    An extreme axis.

12
Choose all
1 point

Select all features included in morphology inspection during a systematic ECG reading.

  1. A

    P-wave appearance.

  2. B

    QRS shape.

  3. C

    PR interval measurement.

  4. D

    R-wave progression across V1–V6.

  5. E

    T-wave appearance.

  6. F

    Frontal QRS axis.

13
Open ended
1 point

An ECG has an irregular rhythm. Outline a systematic approach to reading and summarizing it, including an appropriate rate-estimation method and the main rhythm features to assess. Explain why rate alone is not enough to classify the rhythm.

14
Choose one
1 point

Which statement correctly distinguishes an ECG lead from an electrode?

  1. A

    A lead is a body-attached sensor, while an electrode is a view of electrical activity.

  2. B

    A lead is a view of electrical activity, while an electrode is a body-attached sensor.

  3. C

    A lead is a type of waveform, while an electrode is a paper measurement.

  4. D

    A lead is a calibration setting, while an electrode is a heart rhythm.

15
Choose one
1 point

When placing the chest electrodes, where should V3 be positioned?

  1. A

    At the fourth intercostal space at the right sternal border.

  2. B

    At the fifth intercostal space at the midclavicular line.

  3. C

    Midway between V2 and V4.

  4. D

    At the midaxillary line, level with V4.

16
Choose one
1 point

At the standard paper speed of 25 mm/s, how much time does one small horizontal box represent?

  1. A

    0.04 s

  2. B

    0.20 s

  3. C

    0.40 s

  4. D

    1.00 s

17
Written response
1 point

Which form of the QT interval should be assessed because the QT interval varies with heart rate?

18
Written response
1 point

At standard paper speed, a regular rhythm has four large boxes between consecutive R waves. Using the 300 method, estimate the ventricular rate in beats/min.

19
Choose one
1 point

In the systematic 12-lead reading sequence, what should you do immediately after determining the axis?

  1. A

    Inspect morphology, including R-wave progression and T waves.

  2. B

    Measure the PR, QRS, and QT/QTc intervals.

  3. C

    Estimate the rate again using a different method.

  4. D

    Summarize the tracing before assessing intervals.

20
Choose one
1 point

When reviewing ST segments, which approach best follows the systematic method?

  1. A

    Diagnose a specific condition from any isolated ST change.

  2. B

    Ignore reciprocal changes if an ST abnormality is present.

  3. C

    Assess for abnormalities in anatomically related contiguous leads and consider reciprocal changes.

  4. D

    Assess ST elevation or depression without considering the leads involved.