human circulatory system

Question

The QRS complex in a standard ECG represents:

RankGuru · Accepted Answer

1. **P-wave**: Represents atrial depolarisation (contraction of the atria).
2. **QRS Complex**: Represents ventricular depolarisation, which marks the start of ventricular contraction (systole).
3. **T-wave**: Represents ventricular repolarisation (recovery/relaxation).
4. **Conclusion**: The QRS complex specifically corresponds to the depolarisation of the ventricles.

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human circulatory system

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