Ownclasses

The diagram given here is the standard ECG of a normal person. The P- wave represents the

  • Contraction of both the atria

  • initiation of the ventricular contraction

  • the beginning of the systole

  • end of systole

Answer

A.

Contraction of both the atria

In ECG, P - wave represents the depolarization of atria which leads to contraction of both atria. T- wave represents the return of ventricles from excited to a normal state. The QRS complex represents the depolarisation of the ventricles which initiates ventricular contraction. The contraction starts shortly after  Q and marks the beginning of systole.

In ECG, P - wave represents the depolarization of atria which leads to contraction of both atria. T- wave represents the return of ventricles from excited to a normal state. The QRS complex represents the depolarisation of the ventricles which initiates ventricular contraction. The contraction starts shortly after  Q and marks the beginning of systole.