Where is the U wave typically observed in an EKG?

The U wave is typically seen following the T wave in an electrocardiogram (EKG). This wave represents the repolarization of the Purkinje fibers and is often subtle and not always present in every heartbeat. In a normal EKG, the sequence of the waves includes the P wave, QRS complex, T wave, and then, when present, the U wave comes after the T wave.

Understanding the U wave's position is important, as it can signal various cardiac conditions if it appears abnormally prominent or if its morphology changes. In clinical practice, identifying the U wave and its relationship to the T wave can provide insights into electrolyte imbalances or cardiac issues. The other options do not accurately describe the typical appearance of the U wave relative to the other components of the EKG.