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Free Practice Quiz Question List

1 ECG Monitoring Fundamentals Online Quiz Questions

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

20 questions
01
Choose one
1 point

A standard diagnostic ECG is called a 12-lead ECG. Which statement correctly distinguishes its leads from its electrodes?

  1. A

    It uses 12 electrodes to produce 12 leads.

  2. B

    It uses 10 electrodes to produce 12 leads.

  3. C

    It uses 12 electrodes to produce 10 leads.

02
True or false
1 point

True or false: An ECG records the heart's electrical activity, not the mechanical contraction itself.

  1. A

    True

  2. B

    False

03
Choose one
1 point

A patient is walking during continuous bedside telemetry, so the limb electrodes are placed on the torso. Is this tracing equivalent to a standard diagnostic 12-lead ECG?

  1. A

    Yes. Torso placement produces the same tracing as standard limb placement.

  2. B

    No. Torso placement is a monitoring configuration, not a substitute for a standard diagnostic 12-lead ECG.

  3. C

    Yes, provided the patient is walking.

04
Choose one
1 point

A patient has intermittent palpitations that do not occur during a clinic visit. Which monitor is often the better general match when symptoms may occur over a longer period?

  1. A

    A Holter monitor, because it records continuously during a shorter, defined period.

  2. B

    An event monitor, because intermittent symptoms may occur over a longer period.

  3. C

    Either device is always interchangeable, regardless of symptom frequency.

05
Choose all
1 point

Select all of the following that can be sources of ECG artifact.

  1. A

    Respiration or movement

  2. B

    Skeletal-muscle activity from shivering or tremor

  3. C

    Loose or dried electrodes causing poor contact

  4. D

    Electrical interference

  5. E

    A normal PR interval

06
Choose all
1 point

A patient's telemetry signal is noisy, and one electrode is partly detached. Select all practical steps that can help improve signal quality.

  1. A

    Reattach or replace the partly detached electrode.

  2. B

    Prepare the skin and apply the electrode to clean, dry skin.

  3. C

    Reduce movement or cable tugging where possible.

  4. D

    Check that cables and connections are secure.

  5. E

    Move the electrode away from its intended location to avoid the noisy signal.

  6. F

    Pull the cable taut so it cannot move.

07
Fill in the blank
1 point

In standard chest-lead placement, V4 is placed at the .

08
Fill in the blank
1 point

The PR interval includes conduction through the .

09
Open ended
1 point

Explain why correct electrode placement matters when obtaining a diagnostic 12-lead ECG, and state what should be done if a diagnostic tracing is needed.

10
Choose one
1 point

After V2 and V4 have been positioned correctly, where should V3 be placed?

  1. A

    At the left midaxillary line, level with V4.

  2. B

    Midway between V2 and V4.

  3. C

    At the left anterior axillary line, level with V4.

11
True or false
1 point

True or false: If a monitor displays a sudden chaotic rhythm while the patient is alert and speaking, the patient's appearance alone is enough to rule out a serious rhythm.

  1. A

    True

  2. B

    False

12
Choose one
1 point

When placing V4, V5, and V6, which positioning relationship should be maintained?

  1. A

    Place V5 and V6 level with V4.

  2. B

    Place V5 and V6 progressively higher than V4.

  3. C

    Place V5 and V6 progressively lower than V4.

13
Written response
1 point

How many electrodes are used to produce a standard 12-lead ECG?

14
Choose one
1 point

A learner says a standard 12-lead ECG must use 12 electrodes. Which correction is accurate?

  1. A

    It uses 12 electrodes to produce 10 leads.

  2. B

    It uses 10 electrodes to produce 12 leads.

  3. C

    It uses 12 electrodes to produce 12 leads.

  4. D

    It uses 10 electrodes to produce 10 leads.

15
Written response
1 point

Where should electrode V4 be placed for a standard 12-lead ECG?

16
Choose one
1 point

After correctly placing V2 and V4, where should V3 be placed?

  1. A

    At the left anterior axillary line, level with V4.

  2. B

    At the left midaxillary line, level with V4 and V5.

  3. C

    Midway between V2 and V4.

  4. D

    At the fifth intercostal space at the left midclavicular line.

17
Choose one
1 point

A patient has intermittent palpitations that are not occurring during the clinic visit. Which is the better general match for monitoring over a longer period: a Holter monitor or an event monitor?

  1. A

    A Holter monitor, because it records continuously for a longer period than an event monitor.

  2. B

    An event monitor, because symptoms are intermittent and may occur over a longer period.

  3. C

    A standard diagnostic 12-lead ECG, because it continuously records symptoms at home.

  4. D

    Bedside telemetry, because it is designed for longer-term monitoring outside the clinic.

18
Written response
1 point

What electrical event does the QRS complex represent?

19
True or false
1 point

For a patient walking during continuous bedside telemetry, placing limb electrodes on the torso can reduce motion-related artifact, but this does not make the tracing equivalent to a standard diagnostic 12-lead ECG. True or false?

  1. A

    True

  2. B

    False

20
Written response
1 point

A clinician reviewing an ECG identifies the waveform that represents electrical depolarization of the atria. Which ECG component is it?