Question
The diagram given here is the standard ECG of a normal person. The P- wave represents the
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Contraction of both the atria
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initiation of the ventricular contraction
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the beginning of the systole
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end of systole
Solution
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.
