BCIT 7150 Systematic ECG Analysis 2026 | Questions & Verified
Answers | Latest Update | Graded A+
1. Describe the significance of R-R intervals in assessing heart rhythm.
R-R intervals are crucial for determining the regularity of the heart
rhythm and calculating the heart rate.
R-R intervals are used to measure blood pressure.
R-R intervals indicate the strength of the heart's contractions.
R-R intervals help in identifying the presence of heart murmurs.
2. The heart rate can be calculated from a regular EKG tracing. How is this
done?
Multiply the number of QRS complexes in a 15 second strip by 15
Multiply the number of QRS complexes in a 6 second strip by 10
Count the number of ST segments in a 30 minute strip
Count the number of p waves in a 15 second strip
3. The most accurate way to determine a heart rate on a rhythm strip is to use
the ______ _.
rapid estimation method
300 m dash
10-times method
1500 method
4. Multiple-choice: the calculation that the sequence method for determining
heart rate depends on is:
, The number of QRS intervals in a six second section of the EKG
print out.
The number of small boxes between QRS complexes.
The number of large boxes between QRS complexes.
The number of hash mark sections on the EKG print out.
5. Describe the significance of the T-wave in the context of cardiac electrical
activity.
The T-wave represents the process of ventricular repolarization,
which is essential for the heart to reset for the next contraction.
The T-wave reflects the duration of the PR interval, indicating
conduction speed.
The T-wave indicates atrial depolarization, which initiates the
heartbeat.
The T-wave shows the contraction of the ventricles during systole.
6. What is the normal range for the PR interval in an ECG strip?
0.20 to 0.25 seconds
0.12 to 0.20 seconds
0.08 to 0.12 seconds
0.25 to 0.30 seconds
7. If an ECG shows a prolonged QRS complex, what might this indicate about
the patient's cardiac condition, and what should be the next step in
management?
It suggests normal ventricular function, and no further action is
needed.
, It indicates a rapid heart rate, and the next step should be to
administer beta-blockers.
It shows atrial fibrillation, and the next step should be to start
anticoagulation therapy.
It may indicate a conduction delay, and the next step should be to
assess for underlying causes and consider further diagnostic
testing.
8. The normal positioning of the ST-segment is:
4 mm below the baseline
2 mm above the baseline
3 mm downsloping away from the baseline
on the baseline
9. Describe how the analysis of the PR interval can indicate conduction
problems in an ECG.
The PR interval reflects the time taken for electrical impulses to
travel from the atria to the ventricles; prolonged or shortened
intervals can indicate conduction delays or blocks.
The PR interval is unrelated to conduction problems.
The PR interval measures the heart rate and rhythm.
The PR interval indicates the strength of the heart's contractions.
10. What does the P wave represent in an ECG strip?
Ventricular depolarization
Ventricular repolarization
Atrial repolarization
Answers | Latest Update | Graded A+
1. Describe the significance of R-R intervals in assessing heart rhythm.
R-R intervals are crucial for determining the regularity of the heart
rhythm and calculating the heart rate.
R-R intervals are used to measure blood pressure.
R-R intervals indicate the strength of the heart's contractions.
R-R intervals help in identifying the presence of heart murmurs.
2. The heart rate can be calculated from a regular EKG tracing. How is this
done?
Multiply the number of QRS complexes in a 15 second strip by 15
Multiply the number of QRS complexes in a 6 second strip by 10
Count the number of ST segments in a 30 minute strip
Count the number of p waves in a 15 second strip
3. The most accurate way to determine a heart rate on a rhythm strip is to use
the ______ _.
rapid estimation method
300 m dash
10-times method
1500 method
4. Multiple-choice: the calculation that the sequence method for determining
heart rate depends on is:
, The number of QRS intervals in a six second section of the EKG
print out.
The number of small boxes between QRS complexes.
The number of large boxes between QRS complexes.
The number of hash mark sections on the EKG print out.
5. Describe the significance of the T-wave in the context of cardiac electrical
activity.
The T-wave represents the process of ventricular repolarization,
which is essential for the heart to reset for the next contraction.
The T-wave reflects the duration of the PR interval, indicating
conduction speed.
The T-wave indicates atrial depolarization, which initiates the
heartbeat.
The T-wave shows the contraction of the ventricles during systole.
6. What is the normal range for the PR interval in an ECG strip?
0.20 to 0.25 seconds
0.12 to 0.20 seconds
0.08 to 0.12 seconds
0.25 to 0.30 seconds
7. If an ECG shows a prolonged QRS complex, what might this indicate about
the patient's cardiac condition, and what should be the next step in
management?
It suggests normal ventricular function, and no further action is
needed.
, It indicates a rapid heart rate, and the next step should be to
administer beta-blockers.
It shows atrial fibrillation, and the next step should be to start
anticoagulation therapy.
It may indicate a conduction delay, and the next step should be to
assess for underlying causes and consider further diagnostic
testing.
8. The normal positioning of the ST-segment is:
4 mm below the baseline
2 mm above the baseline
3 mm downsloping away from the baseline
on the baseline
9. Describe how the analysis of the PR interval can indicate conduction
problems in an ECG.
The PR interval reflects the time taken for electrical impulses to
travel from the atria to the ventricles; prolonged or shortened
intervals can indicate conduction delays or blocks.
The PR interval is unrelated to conduction problems.
The PR interval measures the heart rate and rhythm.
The PR interval indicates the strength of the heart's contractions.
10. What does the P wave represent in an ECG strip?
Ventricular depolarization
Ventricular repolarization
Atrial repolarization
