A 27-year-old male asked:
At what level in mmol/l does low potassium have the potential to cause dangerous heart arythmias? less than 2.5? etc
1 doctor answer • 1 doctor weighed in
Pathology 49 years experience
Critically low: Normal serum potassium levels are generally considered to be between 3.5 and 5.0 mEq/L. Levels above 5.0 mEq/L indicate hyperkalemia, and those below 3.5 mEq/L indicate hypokalemia.
A very low potassium level (less than 2.5 mmol/L) can be life-threatening and requires urgent medical attention.
It is worse if the person is taking digoxin.
246 viewsAnswered >2 years ago
Last updated Nov 19, 2018
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