ECG Question #9
A nurse on the telemetry unit is caring for a client with a potassium of 5.6 mEq/L. The nurse anticipates changes in the ECG which would include the following finding:
- A prolonged QT interval
- Delayed SA note impulse activity
- Peaked T waves
- Inverted U wave
A peaked T wave is represented as repolarization of the ventricles. Serum potassium levels may cause the T wave to become peaked and tall. An elevated serum potassium level does not prolong the QT interval, delay the impulse traveling from the SA node, or invert the U wave.