Where does repolarization of the atria occur?

Repolarization of the atria occurs in the heart's atrial muscle cells as they return to their resting electrical state after depolarization. This process is represented by the T wave on an electrocardiogram (ECG), although it is often obscured by the larger QRS complex that represents ventricular depolarization. The repolarization of the atria is crucial for the proper timing of the heart's electrical cycle and ensures that the atria are ready for the next cycle of contraction.