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

Options

A. Beginning of the systole
B. End of systole
C. Contraction of both the atria
D. Initiation of the ventricular contraction

Answer

3

Explanation

Both the option (1) and (3) , are correct . P wave represent atrial depolarisation, i.e., atrial systole (contraction of atria ). Cardiac cycle consits of first systole of heart followed by desatole . Cardiac systole consists of first atrial systole followed by ventricular systole . Thus beginning of systole of heart is represented by atrial systole which is further respresented by the P wave