What EKG changes may be observed in patients with hypokalemia?

In patients with hypokalemia, one of the most notable EKG changes is the presence of prominent U waves, which occur after the T wave. Hypokalemia can lead to a prolonged repolarization of the cardiac myocytes, which is reflected in the EKG as widened T waves and increased amplitude of U waves. U waves are best seen in the precordial leads and can become so pronounced that they might be mistaken for T waves.

Additionally, the combination of broad T waves along with the presence of prominent U waves is a classic finding associated with low potassium levels. Monitoring these changes is important because hypokalemia can precipitate life-threatening arrhythmias if not addressed promptly. Understanding these specific EKG changes helps healthcare providers assess the severity of hypokalemia and implement appropriate interventions.