Question

atrial depolarization causes the _______.

Explanation:

In the context of cardiac electrophysiology (a subfield of Medicine and Health within Natural Science), atrial depolarization is the electrical activation of the atria. This electrical event causes the P wave on an electrocardiogram (ECG) and also leads to atrial contraction (atrial systole). The most direct and classic answer related to the electrical tracing (ECG) or the mechanical event is that atrial depolarization causes the P wave (on ECG) or atrial contraction. If we consider the ECG aspect, the P wave represents atrial depolarization.

Answer:

P wave (or atrial contraction)