Q 1: What does P wave represent? 
Q 2: What is the normal duration of P wave?
Q 3: What is the normal voltage of P wave?

Q 4: What is the duration and voltage of P wave in this EKG?
Q 5: Which is the best lead to look at P wave?
Q 6: What does an abnormal P wave represent?

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Answers

Q 1: What does P wave represent? 

P wave: represents depolarization of both atria


Q 2: What is the normal duration of P wave?

The P wave in general should not be more than 1 box wide


Q 3: What is the normal voltage of P wave?

The P wave in general should not be more than  1 box tall.

Q 4: What is the duration and voltage of P wave in this EKG?

Duration 0.06 secs and 2 mV in amplitude

Q 5: Which is the best lead to look at P wave?

The best lead to look at the P wave is V1.

Q 6: What does an abnormal P wave represent?

If  P wave exceeds the normal range for duration or voltage, it generally means that either or both atria is enlarged (hypertrophied)

If P wave contour