Which wave on an EKG represents the repolarization of the ventricles?

The wave that represents the repolarization of the ventricles on an EKG is the T wave. During the cardiac cycle, after the ventricles have depolarized and contracted (which is represented by the QRS complex), they must then repolarize to prepare for the next heartbeat. This repolarization process occurs as the electrical activity returns to a resting state, and it is visually represented on the EKG by the T wave.

The significance of the T wave is that it reflects the recovery phase of the ventricular muscle, indicating that the heart is getting ready to contract again. This phase is crucial for maintaining proper heart rhythm and function. Discrepancies or abnormalities in the T wave can indicate possible cardiac issues, such as ischemia or electrolyte imbalances.

Understanding the role of the T wave is essential for interpreting the EKG correctly and for assessing the electrical and mechanical functioning of the heart.