A) onset of ventricular ejection
B) end of arterial contraction
C) beginning of atrial contraction
D) None of these
Correct Answer: C
Solution :
P wave is produced by activation of SA node. In fact it represents atrial contraction. It is the first upward deflection caused by the passage of the action current over the auricles. Its average duration is about 0.1 second.You need to login to perform this action.
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