What does the QRS complex represent in an ECG?

What does the QRS complex represent in an ECG?
  1. The depolarisation of the atria
  2. The repolarisation of the atria
  3. The depolarisation of the ventricles
  4. The repolarisation of the ventricles

Solution

The QRS complex represents the depolarisation of the ventricles, which initiates the ventricular contraction.

Asked in: NCERT

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