QRS complex represents____________?
Correct answer: B. Ventricular systole
- A. Atrial systole
- B. Ventricular systole
- C. Atrial diastole
- D. Ventricular diastole
Explanation
The QRS complex records ventricular depolarisation, which initiates ventricular contraction or ventricular systole. Students may choose atrial systole because it is also a contraction phase, but atrial depolarisation is represented mainly by the P wave.
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