Which of the following is a small upward curve that represents the sinoatrial node impulse, wave of depolarization through the atria, and resultant contraction?
A. P wave
B. S wave
C. S-T segment
D. Q wave
E. R wave
A. P wave
The P wave represents the sinoatrial node impulse, wave of depolarization through the atria, and the resultant contraction.
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