ECG Exam Questions With Correct Answers 100%
Guarantee Pass 2026
1. What is the normal duration range for the QRS complex on an ECG?
0.10 to 0.15 seconds
0.06 to 0.10 seconds
0.12 to 0.20 seconds
0.02 to 0.05 seconds
2. The ability of a cardiac tissue to produce its own impulses is known as:
Contractility
Autorhythmicity
Excitability
3. Describe the significance of accurately measuring the apical pulse in cardiac
assessments.
The apical pulse is not significant in cardiac assessments.
Measuring the apical pulse only indicates blood pressure levels.
The apical pulse is primarily used to assess lung function.
Accurately measuring the apical pulse provides important
information about the heart's rhythm and rate, which is crucial for
assessing cardiac function.
4. Describe the significance of the small blocks on ECG paper in relation to
heart rate calculation.
The small blocks indicate the strength of the heart's electrical signals.
The small blocks represent different phases of the cardiac cycle.
, The small blocks help in calculating heart rate by providing a time
reference for the intervals between heartbeats.
The small blocks are used to measure blood pressure during ECG
monitoring.
5. Describe the impact of electrode type on the quality of ECG tracings.
All electrodes produce the same quality of ECG tracings.
Wet electrodes are less effective than dry electrodes for ECG
monitoring.
The type of electrode used can significantly affect the quality of
ECG tracings, with dry electrodes often providing less reliable
signals compared to wet electrodes.
Electrode type does not influence ECG tracing quality.
6. Describe how the characteristics of the QRS complex can help identify the
location of the pacemaker in the heart.
A narrow QRS complex suggests that the pacemaker is in the A-V
junction, indicating normal conduction through the ventricles.
A prolonged PR interval indicates the pacemaker is in the sinoatrial
node, affecting atrial contraction.
A flat T wave shows that the pacemaker is in the atria, indicating no
ventricular contraction.
A wide QRS complex indicates the pacemaker is in the ventricles,
suggesting delayed conduction.
7. What is the normal heart rate set by the sinoatrial (SA) node, the primary
pacemaker of the heart?
40 to 60 beats per minute
, 60 to 100 beats per minute
80 to 120 beats per minute
100 to 120 beats per minute
8. On its own, the A-V node depolarizes at a rate of:
80-100/minute
40-60/minute
20-40/minute
60-80/minute
9. What is the intrinsic rate of the AV node?
20-40 times/minute
80-100 times/minute
60-80 times/minute
40-60 times/minute
10. Each large block on the EKG paper is equal to ____ seconds.
0.20
4
20
, 0.04
11. What is the normal pacing rate of the A-V node in beats per minute?
100 to 120 beats per minute
60 to 100 beats per minute
20 to 40 beats per minute
40 to 60 beats per minute
12. If the conductive gel is allowed to dry before applying the ECG electrodes,
what impact might this have on the ECG results?
It will have no effect on the ECG results.
It may lead to poor signal quality and inaccurate readings.
It will enhance the clarity of the ECG waveforms.
It will improve the adhesion of the electrodes to the skin.
13. Rhythms and beats originating in the A-V node may be called:
ventricular
junctional
fiberous
atrial
14. Describe the significance of the P wave in the context of the cardiac cycle.
The P wave indicates ventricular depolarization, leading to ventricular
contraction.
The P wave represents atrial depolarization, which is crucial for
initiating the contraction of the atria.
Guarantee Pass 2026
1. What is the normal duration range for the QRS complex on an ECG?
0.10 to 0.15 seconds
0.06 to 0.10 seconds
0.12 to 0.20 seconds
0.02 to 0.05 seconds
2. The ability of a cardiac tissue to produce its own impulses is known as:
Contractility
Autorhythmicity
Excitability
3. Describe the significance of accurately measuring the apical pulse in cardiac
assessments.
The apical pulse is not significant in cardiac assessments.
Measuring the apical pulse only indicates blood pressure levels.
The apical pulse is primarily used to assess lung function.
Accurately measuring the apical pulse provides important
information about the heart's rhythm and rate, which is crucial for
assessing cardiac function.
4. Describe the significance of the small blocks on ECG paper in relation to
heart rate calculation.
The small blocks indicate the strength of the heart's electrical signals.
The small blocks represent different phases of the cardiac cycle.
, The small blocks help in calculating heart rate by providing a time
reference for the intervals between heartbeats.
The small blocks are used to measure blood pressure during ECG
monitoring.
5. Describe the impact of electrode type on the quality of ECG tracings.
All electrodes produce the same quality of ECG tracings.
Wet electrodes are less effective than dry electrodes for ECG
monitoring.
The type of electrode used can significantly affect the quality of
ECG tracings, with dry electrodes often providing less reliable
signals compared to wet electrodes.
Electrode type does not influence ECG tracing quality.
6. Describe how the characteristics of the QRS complex can help identify the
location of the pacemaker in the heart.
A narrow QRS complex suggests that the pacemaker is in the A-V
junction, indicating normal conduction through the ventricles.
A prolonged PR interval indicates the pacemaker is in the sinoatrial
node, affecting atrial contraction.
A flat T wave shows that the pacemaker is in the atria, indicating no
ventricular contraction.
A wide QRS complex indicates the pacemaker is in the ventricles,
suggesting delayed conduction.
7. What is the normal heart rate set by the sinoatrial (SA) node, the primary
pacemaker of the heart?
40 to 60 beats per minute
, 60 to 100 beats per minute
80 to 120 beats per minute
100 to 120 beats per minute
8. On its own, the A-V node depolarizes at a rate of:
80-100/minute
40-60/minute
20-40/minute
60-80/minute
9. What is the intrinsic rate of the AV node?
20-40 times/minute
80-100 times/minute
60-80 times/minute
40-60 times/minute
10. Each large block on the EKG paper is equal to ____ seconds.
0.20
4
20
, 0.04
11. What is the normal pacing rate of the A-V node in beats per minute?
100 to 120 beats per minute
60 to 100 beats per minute
20 to 40 beats per minute
40 to 60 beats per minute
12. If the conductive gel is allowed to dry before applying the ECG electrodes,
what impact might this have on the ECG results?
It will have no effect on the ECG results.
It may lead to poor signal quality and inaccurate readings.
It will enhance the clarity of the ECG waveforms.
It will improve the adhesion of the electrodes to the skin.
13. Rhythms and beats originating in the A-V node may be called:
ventricular
junctional
fiberous
atrial
14. Describe the significance of the P wave in the context of the cardiac cycle.
The P wave indicates ventricular depolarization, leading to ventricular
contraction.
The P wave represents atrial depolarization, which is crucial for
initiating the contraction of the atria.
