Use reasoning to answer the following question.
Context: The P wave in the ECG represents atrial depolarization, which results in atrial contraction, or atrial systole.\n\nQuestion: the p-wave phase of an electrocardiogram (ecg) represents?

atrial depolarization , which results in atrial contraction , or atrial systole
The relevant information to answer the above question is: The P wave in the ECG represents atrial depolarization, which results in atrial contraction, or atrial systole.

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The answer is atrial depolarization , which results in atrial contraction , or atrial systole