Which of the following correctly explain...

Which of the following correctly explains a phase`//`event in cardiac cycle in a standard electrocardiogram

A

QRS complex indicates atrial contrac- tion

B

ORS complex indicates ventricular con- traction

C

Time between S and T represents atri- al systole

D

P-wave indicates beginning of ventricu- lar contraction

Verified by Experts

The correct Answer is:

b

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