Microvolt T-Wave Alternans Test

During an electrocardiogram (EKG or ECG), a T-wave represents the resetting of the electrical cells in your heart’s ventricles. Microvolt T-wave Alternans are slight differences in the T-wave from one beat to the next and may indicate your risk for abnormal heart rhythms. However, these differences are usually not visible to the naked eye during a routine EKG. A Microvolt T-wave Alternans test measures these slight differences and allows your doctor to identify problems with your heart that an EKG might not have detected.

The test is similar to an exercise stress test. Sensors are applied to your chest and back. They are connected to wires that lead to Microvolt T-wave Alternans equipment. Information will be collected while you are at rest and as you walk on a treadmill. If you are unable to use the treadmill, you may be given a drug to increase your heart rate.

Diagnoses these conditions:

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