Which ECG wave represents repolarization of the ventricles?

The T wave on an electrocardiogram (ECG) represents the repolarization of the ventricles. During this phase, the ventricular muscle cells recover from the depolarization that occurred during the QRS complex, which represents ventricular contraction. The process of repolarization is essential for the heart to reset and prepare for the next heartbeat.

In contrast, the P wave indicates atrial depolarization, occurring when the atria contract. The QRS complex reflects the electrical impulse that causes the ventricles to depolarize and contract, while the PR interval represents the time taken for the electrical impulse to travel from the atria to the ventricles. Understanding these distinctions is crucial as they highlight the different phases of the cardiac cycle and how the heart functions. Hence, it is clear that the T wave is specifically associated with ventricular repolarization.