ECG Practice Test: Basic Interpretation

1. Question 1
   • Ventricular repolarization
   • Ventricular depolarization
   • Atrial repolarization
   • Atrial relaxation
2. Question 2
   • T wave
   • QRS complex
   • P wave
   • PR segment
3. Question 3
   • The cell becomes electrically activated
   • The cell stops conducting electrical impulses
   • The cell permanently loses excitability
   • The cell returns to its resting electrical state
4. Question 4
   • The electrical recovery of a cardiac cell
   • The movement of an electrode on the skin
   • The mechanical filling of the ventricles
   • The initial activation of the atria
5. Question 5
   • Three positive electrodes connected in series
   • Two positive chest electrodes only
   • One positive electrode and one negative electrode
   • One chest electrode and no reference electrode
6. Question 6
   • Lead III
   • Lead I
   • Lead II
   • Lead aVF
7. Question 7
   • 4
   • 3
   • 12
   • 6
8. Question 8
   • 42 beats/min
   • 60 beats/min
   • 70 beats/min
   • 84 beats/min
9. Question 9
   • 110 beats/min
   • 55 beats/min
   • 100 beats/min
   • 165 beats/min
10. Question 10
    • It averages the number of beats over a known time interval
    • It identifies the pacemaker without examining P waves
    • It eliminates all artifact from the recording
    • It measures the QT interval automatically
11. Question 11
    • Mechanical contraction always initiates depolarization
    • Electrode placement creates the cardiac depolarization
    • Electrical depolarization precedes the associated mechanical contraction
    • Repolarization is identical to ventricular contraction
12. Question 12
    • Bipolar lead
    • Unipolar lead
    • Calibration lead
    • Mechanical lead
13. Question 13
    • P wave
    • Q wave
    • T wave
    • R wave
14. Question 14
    • It estimates rate by dividing QRS complexes by 10
    • It estimates rate by multiplying counted QRS complexes by 10
    • It requires counting P waves only
    • It can be used only when the rhythm is perfectly regular
15. Question 15
    • QRS width, electrode brand, QT interval, respiratory rate
    • QT interval, symptoms, blood pressure, P waves, rate
    • Rate, rhythm, P waves, PR interval, QRS, QT interval
    • T waves, lead placement, medication list, PR interval
16. Question 16
    • Alternating narrow and wide QRS complexes
    • Similar R-R intervals throughout the strip
    • A changing baseline with frequent artifact
    • Variable P-wave shapes with no pattern
17. Question 17
    • PR interval
    • QT interval
    • R-R interval
    • ST segment
18. Question 18
    • It measures ventricular repolarization
    • It is definitely prolonged
    • It is too short to include atrial depolarization
    • It is within the usual adult reference range
19. Question 19
    • The time from the P wave to the T wave only
    • The time required for ventricular depolarization
    • The time between successive ventricular beats
    • The time required for atrial repolarization
20. Question 20
    • 0.04 seconds
    • 0.12 seconds
    • 0.24 seconds
    • 0.18 seconds
21. Question 21
    • PR segment
    • PR interval
    • R-R interval
    • QT interval
22. Question 22
    • Measure only the T waves
    • Ignore the strip because artifact cannot be corrected
    • Classify the rhythm immediately as ventricular tachycardia
    • Confirm signal quality and assess the patient or monitor source
23. Question 23
    • Regularly irregular
    • Irregularly irregular
    • Regular
    • Asystolic
24. Question 24
    • ST segment
    • R-R interval
    • QT interval
    • PR interval
25. Question 25
    • R-R intervals are identical throughout
    • R-R intervals vary without a repeating pattern
    • R-R intervals alternate in a repeating pattern
    • No electrical activity is present
26. Question 26
    • Wide
    • Absent
    • A normal P wave
    • Narrow
27. Question 27
    • A completely chaotic baseline
    • Only wide ventricular complexes without atrial activity
    • No visible P waves and unpredictable R-R intervals
    • Consistent P waves with a predictable relationship to QRS complexes
28. Question 28
    • No consistent relationship between P waves and QRS complexes
    • Chaotic ventricular activity without identifiable complexes
    • A continuous sawtooth baseline with no atrial activity
    • A normal-appearing P wave before each QRS with a fast rate
29. Question 29
    • A fast, irregular rhythm with no P waves
    • A slow, regular rhythm with a P wave before each QRS
    • Wide complexes with a chaotic baseline
    • Sawtooth atrial activity with variable conduction
30. Question 30
    • Regular rhythm with identical P waves
    • Chaotic ventricular waveform without organized electrical activity
    • Regular wide-complex rhythm with one P wave before every QRS
    • Irregularly irregular rhythm with no consistent P waves

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