U wave

U wave is a wave on an ECG that follows the T wave. It is usually in the same direction as the T wave and is generally considered to be a normal part of the ECG. However, in some cases, the U wave can be a sign of a medical condition.

Overview

The U wave is not always present on an ECG, and its absence is not usually a cause for concern. It is most commonly seen in slow heart rates, such as during sleep or in athletes. The exact cause of the U wave is not known, but it is thought to be related to the repolarization of the Purkinje fibers or the Papillary muscles.

Clinical significance

In some cases, the U wave can be a sign of a medical condition. For example, a prominent U wave can be a sign of Hypokalemia, a condition characterized by low levels of potassium in the blood. Other conditions that can cause a prominent U wave include Hypercalcemia, Hypothermia, and certain medications.

Inverted U waves can be a sign of Ischemia, a condition in which there is a lack of blood flow and oxygen to a part of the body. This is often a sign of a serious heart condition and requires immediate medical attention.

See also

• Electrocardiogram
• Hypokalemia
• Hypercalcemia
• Hypothermia
• Ischemia

References

U wave Resources
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