What EKG change is commonly associated with hyperkalemia?

Peaked T waves are a classic electrocardiogram (EKG) change that is commonly observed in patients with hyperkalemia. As the potassium levels in the blood rise, it affects the cardiac action potentials, leading to alterations in the repolarization phase of the cardiac cycle. The most notable change seen in the EKG is the appearance of T waves that are taller and more pointed than normal. This change occurs due to the effects of elevated potassium on myocardial cell membrane potential, which enhances the rapid depolarization and results in prominent T waves.

Other EKG changes can occur with significant hyperkalemia, such as QRS widening and, eventually, ST segment alterations. However, peaked T waves are typically the first and most characteristic change that clinicians will look for when assessing a patient for potential hyperkalemia. This recognition is critical, as it can guide further evaluation and management of the patient's potassium levels and overall cardiac stability. Understanding these changes is essential for early detection and intervention in hyperkalemic patients.