Question. Context: The P wave in the ECG represents atrial depolarization, which results in atrial contraction, or atrial systole.

Question: the p-wave phase of an electrocardiogram (ecg) represents?
Answer. atrial depolarization , which results in atrial contraction , or atrial systole
What step-by-step reasoning justifies that answer?
Reasoning: 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.