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Match the Column-I with Column-II.

1. P-wave - Depolarisation of atria
2. QRS complex - Depolarisation of ventricles
3. T-wave - Coronary ischemia
4. Reduction in the size of T-wave - Repolarisation of atria

Correct answer: P-wave - Depolarisation of atria

Solution

The P-wave represents atrial depolarisation, so that pair is correct. The other options are mismatched: QRS is ventricular depolarisation, T-wave is ventricular repolarisation, and atrial repolarisation is usually hidden by the QRS complex.

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