What is commonly seen on an EKG in patients with hypokalemia?

In patients with hypokalemia, U waves are a characteristic finding on an electrocardiogram (EKG). These U waves typically appear as small, rounded deflections following the T wave. The presence of U waves is attributed to altered repolarization processes in the heart, which can occur due to low potassium levels. They are often most prominent in the precordial leads, especially in leads V2 to V4.

U waves can represent delayed ventricular repolarization, which is directly influenced by the extracellular concentration of potassium. As potassium levels decrease, the normal repolarization pathways may become altered, resulting in this distinct EKG finding. It is essential for healthcare providers to recognize U waves, as they can serve as a clinical indicator of hypokalemia and prompt necessary interventions.