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Hypokalemia
There may be no symptoms at all, but severe hypokalemia may cause:
- Muscle weakness and myalgia
- Increased risk of hyponatremia with resultant confusion and seizures
- Disturbed heart rhythm (ranging from ectopy to arrhythmias)
- Serious arrhythmias
EKG changes associated with hypokalemia:
- Flattened (notched) T waves
- U waves
- ST depression
- Prolonged QT interval1
1. http://en.wikipedia.org/wiki/Hypokalemia
First answer by Porkdisco. Last edit by Porkdisco. Contributor trust: 400 [recommend contributor]. Question popularity: 28 [recommend question]





