Which EKG finding is associated with ventricular repolarization?

The T wave is specifically associated with ventricular repolarization in an electrocardiogram (EKG). After the ventricles have depolarized and contracted, they need to reset their electrical state to prepare for the next heartbeat. This resetting is represented by the T wave on the EKG. During this phase, the myocardial cells of the ventricles are repolarizing, which means they are returning to a resting state after the contraction, and this process results in the characteristic shape and duration of the T wave.

The other components of the EKG reflect different aspects of the cardiac cycle. The P wave corresponds to atrial depolarization, indicating when the atria contract. The QRS complex represents ventricular depolarization, which occurs just before the ventricles contract. The U wave, although observed in some EKGs, is less understood and may represent a late repolarization phase of the ventricles or another abnormality. Thus, the T wave is the key indicator of ventricular repolarization.