ECG Question #4


Use the ECG strip above to answer the following questions:

Ventricular depolarization is represented by which area of the ECG strip?


  1. QRS complex
    • Rationale:
  2. P wave
    • Rationale:
  3. ST segment
    • Rationale:
  4. PR interval
    • Rationale:



The QRS complex represents ventricular depolarization. The P wave represents atrial depolarization. The ST segment represents early ventricular repolarization. The PR interval represents the time needed for sinus node stimulation, atrial depolarization, and conduction through the AV node before ventricular depolarization occurs.

Learning Outcomes

Test Taking Tip

Video Rationale