Which wave in an electrocardiogram represents ventricular repolarization?

The correct answer is the T Wave, as it specifically represents the process of ventricular repolarization in an electrocardiogram (ECG or EKG). During this phase, the ventricles recover from the depolarization that led to contraction, allowing them to reset before the next heartbeat.

Repolarization is critical because it prepares the ventricles for their next round of contraction, ensuring effective and coordinated heart function. The T Wave reflects the electrical activity as the ventricles transition from a contracted state back to a resting state, which is essential for maintaining normal heart rhythms and overall cardiovascular health.

In contrast, the P Wave is associated with atrial depolarization, which occurs earlier in the cardiac cycle when the atria contract. The QRS Complex represents ventricular depolarization, which is the process by which the ventricles contract. The U Wave, while it can appear in some ECGs, is not commonly analyzed and does not have a centralized role in the standard understanding of ventricular repolarization compared to the T Wave.